fix(gemini): read GEMINI_MODEL from ~/.gemini/.env (#131 )

When using gemini backend without --model flag, now automatically reads GEMINI_MODEL from ~/.gemini/.env file, consistent with how claude backend reads model from settings.
feat: add feature-dev skill with 7-phase workflow
2026-02-05 02:30:26 +08:00 · 2026-01-23 12:03:50 +08:00 · 2026-01-23 12:01:31 +08:00 · 2026-01-23 12:01:04 +08:00 · 2026-01-23 12:00:55 +08:00 · 2026-01-23 12:00:47 +08:00
147 changed files with 12721 additions and 3502 deletions
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -1,209 +1,54 @@
 {
-  "name": "claude-code-dev-workflows",
+  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
+  "name": "myclaude",
+  "version": "5.6.1",
+  "description": "Professional multi-agent development workflows with OmO orchestration, Requirements-Driven and BMAD methodologies",
  "owner": {
-    "name": "Claude Code Dev Workflows",
-    "email": "contact@example.com",
-    "url": "https://github.com/cexll/myclaude"
-  },
-  "metadata": {
-    "description": "Professional multi-agent development workflows with Requirements-Driven and BMAD methodologies, featuring 16+ specialized agents and 12+ commands",
-    "version": "1.0.0"
+    "name": "cexll",
+    "email": "evanxian9@gmail.com"
  },
  "plugins": [
    {
-      "name": "requirements-driven-development",
-      "source": "./requirements-driven-workflow/",
-      "description": "Streamlined requirements-driven development workflow with 90% quality gates for practical feature implementation",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "requirements",
-        "workflow",
-        "automation",
-        "quality-gates",
-        "feature-development",
-        "agile",
-        "specifications"
-      ],
-      "category": "workflows",
-      "strict": false,
-      "commands": [
-        "./commands/requirements-pilot.md"
-      ],
-      "agents": [
-        "./agents/requirements-generate.md",
-        "./agents/requirements-code.md",
-        "./agents/requirements-testing.md",
-        "./agents/requirements-review.md"
-      ]
+      "name": "omo",
+      "description": "Multi-agent orchestration for code analysis, bug investigation, fix planning, and implementation with intelligent routing to specialized agents",
+      "version": "5.6.1",
+      "source": "./skills/omo",
+      "category": "development"
    },
    {
-      "name": "bmad-agile-workflow",
-      "source": "./bmad-agile-workflow/",
+      "name": "dev",
+      "description": "Lightweight development workflow with requirements clarification, parallel codex execution, and mandatory 90% test coverage",
+      "version": "5.6.1",
+      "source": "./dev-workflow",
+      "category": "development"
+    },
+    {
+      "name": "requirements",
+      "description": "Requirements-driven development workflow with quality gates for practical feature implementation",
+      "version": "5.6.1",
+      "source": "./requirements-driven-workflow",
+      "category": "development"
+    },
+    {
+      "name": "bmad",
      "description": "Full BMAD agile workflow with role-based agents (PO, Architect, SM, Dev, QA) and interactive approval gates",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "bmad",
-        "agile",
-        "scrum",
-        "product-owner",
-        "architect",
-        "developer",
-        "qa",
-        "workflow-orchestration"
-      ],
-      "category": "workflows",
-      "strict": false,
-      "commands": [
-        "./commands/bmad-pilot.md"
-      ],
-      "agents": [
-        "./agents/bmad-po.md",
-        "./agents/bmad-architect.md",
-        "./agents/bmad-sm.md",
-        "./agents/bmad-dev.md",
-        "./agents/bmad-qa.md",
-        "./agents/bmad-orchestrator.md",
-        "./agents/bmad-review.md"
-      ]
+      "version": "5.6.1",
+      "source": "./bmad-agile-workflow",
+      "category": "development"
    },
    {
-      "name": "development-essentials",
-      "source": "./development-essentials/",
+      "name": "dev-kit",
      "description": "Essential development commands for coding, debugging, testing, optimization, and documentation",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "code",
-        "debug",
-        "test",
-        "optimize",
-        "review",
-        "bugfix",
-        "refactor",
-        "documentation"
-      ],
-      "category": "essentials",
-      "strict": false,
-      "commands": [
-        "./commands/code.md",
-        "./commands/debug.md",
-        "./commands/test.md",
-        "./commands/optimize.md",
-        "./commands/review.md",
-        "./commands/bugfix.md",
-        "./commands/refactor.md",
-        "./commands/docs.md",
-        "./commands/ask.md",
-        "./commands/think.md"
-      ],
-      "agents": [
-        "./agents/code.md",
-        "./agents/bugfix.md",
-        "./agents/bugfix-verify.md",
-        "./agents/optimize.md",
-        "./agents/debug.md"
-      ]
+      "version": "5.6.1",
+      "source": "./development-essentials",
+      "category": "productivity"
    },
    {
-      "name": "codex-cli",
-      "source": "./skills/codex/",
-      "description": "Execute Codex CLI for code analysis, refactoring, and automated code changes with file references (@syntax) and structured output",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "codex",
-        "code-analysis",
-        "refactoring",
-        "automation",
-        "gpt-5",
-        "ai-coding"
-      ],
-      "category": "essentials",
-      "strict": false,
-      "skills": [
-        "./SKILL.md"
-      ]
-    },
-    {
-      "name": "gemini-cli",
-      "source": "./skills/gemini/",
-      "description": "Execute Gemini CLI for AI-powered code analysis and generation with Google's latest Gemini models",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "gemini",
-        "google-ai",
-        "code-analysis",
-        "code-generation",
-        "ai-reasoning"
-      ],
-      "category": "essentials",
-      "strict": false,
-      "skills": [
-        "./SKILL.md"
-      ]
-    },
-    {
-      "name": "dev-workflow",
-      "source": "./dev-workflow/",
-      "description": "Minimal lightweight development workflow with requirements clarification, parallel codex execution, and mandatory 90% test coverage",
-      "version": "1.0.0",
-      "author": {
-        "name": "Claude Code Dev Workflows",
-        "url": "https://github.com/cexll/myclaude"
-      },
-      "homepage": "https://github.com/cexll/myclaude",
-      "repository": "https://github.com/cexll/myclaude",
-      "license": "MIT",
-      "keywords": [
-        "dev",
-        "workflow",
-        "codex",
-        "testing",
-        "coverage",
-        "concurrent",
-        "lightweight"
-      ],
-      "category": "workflows",
-      "strict": false,
-      "commands": [
-        "./commands/dev.md"
-      ],
-      "agents": [
-        "./agents/dev-plan-generator.md"
-      ]
+      "name": "sparv",
+      "description": "Minimal SPARV workflow (Specify→Plan→Act→Review→Vault) with 10-point spec gate, unified journal, 2-action saves, 3-failure protocol, and EHRB risk detection",
+      "version": "1.1.0",
+      "source": "./skills/sparv",
+      "category": "development"
    }
  ]
 }
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -74,7 +74,7 @@ jobs:
          if [ "${{ matrix.goos }}" = "windows" ]; then
            OUTPUT_NAME="${OUTPUT_NAME}.exe"
          fi
-          go build -ldflags="-s -w -X main.version=${VERSION}" -o ${OUTPUT_NAME} .
+          go build -ldflags="-s -w -X main.version=${VERSION}" -o ${OUTPUT_NAME} ./cmd/codeagent
          chmod +x ${OUTPUT_NAME}
          echo "artifact_path=codeagent-wrapper/${OUTPUT_NAME}" >> $GITHUB_OUTPUT

--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 __pycache__
 .coverage
 coverage.out
+references
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,66 @@

 All notable changes to this project will be documented in this file.

+## [5.6.4] - 2026-01-15
+
+### 🚀 Features
+
+- add reasoning effort config for codex backend
+- default to skip-permissions and bypass-sandbox
+- add multi-agent support with yolo mode
+- add omo module for multi-agent orchestration
+- add intelligent backend selection based on task complexity (#61)
+- v5.4.0 structured execution report (#94)
+- add millisecond-precision timestamps to all log entries (#91)
+- skill-install install script and security scan
+- add uninstall scripts with selective module removal
+
+### 🐛 Bug Fixes
+
+- filter codex stderr noise logs
+- use config override for codex reasoning effort
+- propagate SkipPermissions to parallel tasks (#113)
+- add timeout for Windows process termination
+- reject dash as workdir parameter (#118)
+- add sleep in fake script to prevent CI race condition
+- fix gemini env load
+- fix omo
+- fix codeagent skill TaskOutput
+- 修复 Gemini init 事件 session_id 未提取的问题 (#111)
+- Windows 后端退出：taskkill 结束进程树 + turn.completed 支持 (#108)
+- support model parameter for all backends, auto-inject from settings (#105)
+- replace setx with reg add to avoid 1024-char PATH truncation (#101)
+- 移除未知事件格式的日志噪声 (#96)
+- prevent duplicate PATH entries on reinstall (#95)
+- Minor issues #12 and #13 - ASCII mode and performance optimization
+- correct settings.json filename and bump version to v5.2.8
+- allow claude backend to read env from setting.json while preventing recursion (#92)
+- comprehensive security and quality improvements for PR #85 & #87 (#90)
+- Improve backend termination after message and extend timeout (#86)
+- Parser重复解析优化 + 严重bug修复 + PR #86兼容性 (#88)
+- filter noisy stderr output from gemini backend (#83)
+- 修復 wsl install.sh 格式問題 (#78)
+- 修复多 backend 并行日志 PID 混乱并移除包装格式 (#74) (#76)
+
+### 🚜 Refactor
+
+- remove sisyphus agent and unused code
+- streamline agent documentation and remove sisyphus
+
+### 📚 Documentation
+
+- add OmO workflow to README and fix plugin marketplace structure
+- update FAQ for default bypass/skip-permissions behavior
+- 添加 FAQ 常见问题章节
+- update troubleshooting with idempotent PATH commands (#95)
+
+### 💼 Other
+
+- add test-cases skill
+- add browser skill
+- BMADh和Requirements-Driven支持根据语义生成对应的文档 (#82)
+- update all readme
+
 ## [5.2.4] - 2025-12-16


--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@

 [![License: AGPL-3.0](https://img.shields.io/badge/License-AGPL_v3-blue.svg)](https://www.gnu.org/licenses/agpl-3.0)
 [![Claude Code](https://img.shields.io/badge/Claude-Code-blue)](https://claude.ai/code)
-[![Version](https://img.shields.io/badge/Version-5.2-green)](https://github.com/cexll/myclaude)
+[![Version](https://img.shields.io/badge/Version-5.6-green)](https://github.com/cexll/myclaude)

 > AI-powered development automation with multi-backend execution (Codex/Claude/Gemini)

@@ -35,6 +35,41 @@ python3 install.py --install-dir ~/.claude

 ## Workflows Overview

+### 0. OmO Multi-Agent Orchestrator (Recommended for Complex Tasks)
+
+**Intelligent multi-agent orchestration that routes tasks to specialized agents based on risk signals.**
+
+```bash
+/omo "analyze and fix this authentication bug"
+```
+
+**Agent Hierarchy:**
+| Agent | Role | Backend | Model |
+|-------|------|---------|-------|
+| `oracle` | Technical advisor | Claude | claude-opus-4-5 |
+| `librarian` | External research | Claude | claude-sonnet-4-5 |
+| `explore` | Codebase search | OpenCode | grok-code |
+| `develop` | Code implementation | Codex | gpt-5.2 |
+| `frontend-ui-ux-engineer` | UI/UX specialist | Gemini | gemini-3-pro |
+| `document-writer` | Documentation | Gemini | gemini-3-flash |
+
+**Routing Signals (Not Fixed Pipeline):**
+- Code location unclear → `explore`
+- External library/API → `librarian`
+- Risky/multi-file change → `oracle`
+- Implementation needed → `develop` / `frontend-ui-ux-engineer`
+
+**Common Recipes:**
+- Explain code: `explore`
+- Small fix with known location: `develop` directly
+- Bug fix, location unknown: `explore → develop`
+- Cross-cutting refactor: `explore → oracle → develop`
+- External API integration: `explore + librarian → oracle → develop`
+
+**Best For:** Complex bug investigation, multi-file refactoring, architecture decisions
+
+---
+
 ### 1. Dev Workflow (Recommended)

 **The primary workflow for most development tasks.**
@@ -160,7 +195,7 @@ Required features:
 - `-p` - Prompt input flag
 - `-r <session_id>` - Resume sessions

-**Security Note:** The wrapper only adds `--dangerously-skip-permissions` for Claude when explicitly enabled (e.g. `--skip-permissions` / `CODEAGENT_SKIP_PERMISSIONS=true`). Keep it disabled unless you understand the risk.
+**Security Note:** The wrapper adds `--dangerously-skip-permissions` for Claude by default. Set `CODEAGENT_SKIP_PERMISSIONS=false` to disable if you need permission prompts.

 **Verify Claude CLI is installed:**
 ```bash
@@ -536,6 +571,29 @@ network_access = true

 ---

+### Q5: How to disable default bypass/skip-permissions mode
+
+**Background:**
+By default, codeagent-wrapper enables bypass mode for both Codex and Claude backends:
+- `CODEX_BYPASS_SANDBOX=true` - Bypasses Codex sandbox restrictions
+- `CODEAGENT_SKIP_PERMISSIONS=true` - Skips Claude permission prompts
+
+**To disable (if you need sandbox/permission protection):**
+```bash
+export CODEX_BYPASS_SANDBOX=false
+export CODEAGENT_SKIP_PERMISSIONS=false
+```
+
+Or add to your shell profile (`~/.zshrc` or `~/.bashrc`):
+```bash
+echo 'export CODEX_BYPASS_SANDBOX=false' >> ~/.zshrc
+echo 'export CODEAGENT_SKIP_PERMISSIONS=false' >> ~/.zshrc
+```
+
+**Note:** Disabling bypass mode will require manual approval for certain operations.
+
+---
+
 **Still having issues?** Visit [GitHub Issues](https://github.com/cexll/myclaude/issues) to search or report new issues.

 ---
--- a/README_CN.md
+++ b/README_CN.md
@@ -2,7 +2,7 @@

 [![License: AGPL-3.0](https://img.shields.io/badge/License-AGPL_v3-blue.svg)](https://www.gnu.org/licenses/agpl-3.0)
 [![Claude Code](https://img.shields.io/badge/Claude-Code-blue)](https://claude.ai/code)
-[![Version](https://img.shields.io/badge/Version-5.2-green)](https://github.com/cexll/myclaude)
+[![Version](https://img.shields.io/badge/Version-5.6-green)](https://github.com/cexll/myclaude)

 > AI 驱动的开发自动化 - 多后端执行架构 (Codex/Claude/Gemini)

@@ -30,6 +30,41 @@ python3 install.py --install-dir ~/.claude

 ## 工作流概览

+### 0. OmO 多智能体编排器（复杂任务推荐）
+
+**基于风险信号智能路由任务到专业智能体的多智能体编排系统。**
+
+```bash
+/omo "分析并修复这个认证 bug"
+```
+
+**智能体层级：**
+| 智能体 | 角色 | 后端 | 模型 |
+|-------|------|------|------|
+| `oracle` | 技术顾问 | Claude | claude-opus-4-5 |
+| `librarian` | 外部研究 | Claude | claude-sonnet-4-5 |
+| `explore` | 代码库搜索 | OpenCode | grok-code |
+| `develop` | 代码实现 | Codex | gpt-5.2 |
+| `frontend-ui-ux-engineer` | UI/UX 专家 | Gemini | gemini-3-pro |
+| `document-writer` | 文档撰写 | Gemini | gemini-3-flash |
+
+**路由信号（非固定流水线）：**
+- 代码位置不明确 → `explore`
+- 外部库/API → `librarian`
+- 高风险/多文件变更 → `oracle`
+- 需要实现 → `develop` / `frontend-ui-ux-engineer`
+
+**常用配方：**
+- 解释代码：`explore`
+- 位置已知的小修复：直接 `develop`
+- Bug 修复，位置未知：`explore → develop`
+- 跨模块重构：`explore → oracle → develop`
+- 外部 API 集成：`explore + librarian → oracle → develop`
+
+**适用场景：** 复杂 bug 调查、多文件重构、架构决策
+
+---
+
 ### 1. Dev 工作流（推荐）

 **大多数开发任务的首选工作流。**
@@ -408,6 +443,28 @@ network_access = true

 ---

+### Q5: 执行时遇到权限拒绝或沙箱限制
+
+**问题描述：**
+运行 codeagent-wrapper 时出现权限错误或沙箱限制。
+
+**解决方案：**
+设置以下环境变量：
+```bash
+export CODEX_BYPASS_SANDBOX=true
+export CODEAGENT_SKIP_PERMISSIONS=true
+```
+
+或添加到 shell 配置文件（`~/.zshrc` 或 `~/.bashrc`）：
+```bash
+echo 'export CODEX_BYPASS_SANDBOX=true' >> ~/.zshrc
+echo 'export CODEAGENT_SKIP_PERMISSIONS=true' >> ~/.zshrc
+```
+
+**注意：** 这些设置会绕过安全限制，请仅在可信环境中使用。
+
+---
+
 **仍有疑问？** 请访问 [GitHub Issues](https://github.com/cexll/myclaude/issues) 搜索或提交新问题。

 ---
--- a/bmad-agile-workflow/.claude-plugin/marketplace.json
+++ b/bmad-agile-workflow/.claude-plugin/marketplace.json
@@ -1,37 +0,0 @@
-{
-  "name": "bmad-agile-workflow",
-  "source": "./",
-  "description": "Full BMAD agile workflow with role-based agents (PO, Architect, SM, Dev, QA) and interactive approval gates",
-  "version": "1.0.0",
-  "author": {
-    "name": "Claude Code Dev Workflows",
-    "url": "https://github.com/cexll/myclaude"
-  },
-  "homepage": "https://github.com/cexll/myclaude",
-  "repository": "https://github.com/cexll/myclaude",
-  "license": "MIT",
-  "keywords": [
-    "bmad",
-    "agile",
-    "scrum",
-    "product-owner",
-    "architect",
-    "developer",
-    "qa",
-    "workflow-orchestration"
-  ],
-  "category": "workflows",
-  "strict": false,
-  "commands": [
-    "./commands/bmad-pilot.md"
-  ],
-  "agents": [
-    "./agents/bmad-po.md",
-    "./agents/bmad-architect.md",
-    "./agents/bmad-sm.md",
-    "./agents/bmad-dev.md",
-    "./agents/bmad-qa.md",
-    "./agents/bmad-orchestrator.md",
-    "./agents/bmad-review.md"
-  ]
-}
--- a/bmad-agile-workflow/.claude-plugin/plugin.json
+++ b/bmad-agile-workflow/.claude-plugin/plugin.json
@@ -0,0 +1,9 @@
+{
+  "name": "bmad",
+  "description": "Full BMAD agile workflow with role-based agents (PO, Architect, SM, Dev, QA) and interactive approval gates",
+  "version": "5.6.1",
+  "author": {
+    "name": "cexll",
+    "email": "cexll@cexll.com"
+  }
+}
--- a/codeagent-wrapper/.github/workflows/ci.yml
+++ b/codeagent-wrapper/.github/workflows/ci.yml
@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: ["1.21", "1.22"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+          cache: true
+      - name: Test
+        run: make test
+      - name: Build
+        run: make build
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+          cache: true
+      - name: Lint
+        run: make lint
+
--- a/codeagent-wrapper/.gitignore
+++ b/codeagent-wrapper/.gitignore
@@ -1,4 +1,7 @@
 # Build artifacts
+bin/
+codeagent
+codeagent.exe
 codeagent-wrapper
 codeagent-wrapper.exe
 *.test
@@ -9,3 +12,12 @@ coverage*.out
 cover.out
 cover_*.out
 coverage.html
+
+# Logs
+*.log
+
+# Temp files
+*.tmp
+*.swp
+*~
+.DS_Store
--- a/codeagent-wrapper/Makefile
+++ b/codeagent-wrapper/Makefile
@@ -0,0 +1,38 @@
+GO ?= go
+
+BINARY ?= codeagent
+CMD_PKG := ./cmd/codeagent
+
+TOOLS_BIN := $(CURDIR)/bin
+TOOLCHAIN ?= go1.22.0
+GOLANGCI_LINT_VERSION := v1.56.2
+STATICCHECK_VERSION := v0.4.7
+
+GOLANGCI_LINT := $(TOOLS_BIN)/golangci-lint
+STATICCHECK := $(TOOLS_BIN)/staticcheck
+
+.PHONY: build test lint clean install
+
+build:
+	$(GO) build -o $(BINARY) $(CMD_PKG)
+
+test:
+	$(GO) test ./...
+
+$(GOLANGCI_LINT):
+	@mkdir -p $(TOOLS_BIN)
+	GOTOOLCHAIN=$(TOOLCHAIN) GOBIN=$(TOOLS_BIN) $(GO) install github.com/golangci/golangci-lint/cmd/golangci-lint@$(GOLANGCI_LINT_VERSION)
+
+$(STATICCHECK):
+	@mkdir -p $(TOOLS_BIN)
+	GOTOOLCHAIN=$(TOOLCHAIN) GOBIN=$(TOOLS_BIN) $(GO) install honnef.co/go/tools/cmd/staticcheck@$(STATICCHECK_VERSION)
+
+lint: $(GOLANGCI_LINT) $(STATICCHECK)
+	GOTOOLCHAIN=$(TOOLCHAIN) $(GOLANGCI_LINT) run ./...
+	GOTOOLCHAIN=$(TOOLCHAIN) $(STATICCHECK) ./...
+
+clean:
+	@python3 -c 'import glob, os; paths=["codeagent","codeagent.exe","codeagent-wrapper","codeagent-wrapper.exe","coverage.out","cover.out","coverage.html"]; paths += glob.glob("coverage*.out") + glob.glob("cover_*.out") + glob.glob("*.test"); [os.remove(p) for p in paths if os.path.exists(p)]'
+
+install:
+	$(GO) install $(CMD_PKG)
--- a/codeagent-wrapper/README.md
+++ b/codeagent-wrapper/README.md
@@ -0,0 +1,151 @@
+# codeagent-wrapper
+
+`codeagent-wrapper` 是一个用 Go 编写的“多后端 AI 代码代理”命令行包装器：用统一的 CLI 入口封装不同的 AI 工具后端（Codex / Claude / Gemini / Opencode），并提供一致的参数、配置与会话恢复体验。
+
+入口：`cmd/codeagent/main.go`（生成二进制名：`codeagent`）。
+
+## 功能特性
+
+- 多后端支持：`codex` / `claude` / `gemini` / `opencode`
+- 统一命令行：`codeagent [flags] <task>` / `codeagent resume <session_id> <task> [workdir]`
+- 自动 stdin：遇到换行/特殊字符/超长任务自动走 stdin，避免 shell quoting 地狱；也可显式使用 `-`
+- 配置合并：支持配置文件与 `CODEAGENT_*` 环境变量（viper）
+- Agent 预设：从 `~/.codeagent/models.json` 读取 backend/model/prompt 等预设
+- 并行执行：`--parallel` 从 stdin 读取多任务配置，支持依赖拓扑并发执行
+- 日志清理：`codeagent cleanup` 清理旧日志（日志写入系统临时目录）
+
+## 安装
+
+要求：Go 1.21+。
+
+在仓库根目录执行：
+
+```bash
+go install ./cmd/codeagent
+```
+
+安装后确认：
+
+```bash
+codeagent version
+```
+
+## 使用示例
+
+最简单用法（默认后端：`codex`）：
+
+```bash
+codeagent "分析 internal/app/cli.go 的入口逻辑，给出改进建议"
+```
+
+指定后端：
+
+```bash
+codeagent --backend claude "解释 internal/executor/parallel_config.go 的并行配置格式"
+```
+
+指定工作目录（第 2 个位置参数）：
+
+```bash
+codeagent "在当前 repo 下搜索潜在数据竞争" .
+```
+
+显式从 stdin 读取 task（使用 `-`）：
+
+```bash
+cat task.txt | codeagent -
+```
+
+恢复会话：
+
+```bash
+codeagent resume <session_id> "继续上次任务"
+```
+
+并行模式（从 stdin 读取任务配置；禁止位置参数）：
+
+```bash
+codeagent --parallel <<'EOF'
+---TASK---
+id: t1
+workdir: .
+backend: codex
+---CONTENT---
+列出本项目的主要模块以及它们的职责。
+---TASK---
+id: t2
+dependencies: t1
+backend: claude
+---CONTENT---
+基于 t1 的结论，提出重构风险点与建议。
+EOF
+```
+
+## 配置说明
+
+### 配置文件
+
+默认查找路径（当 `--config` 为空时）：
+
+- `$HOME/.codeagent/config.(yaml|yml|json|toml|...)`
+
+示例（YAML）：
+
+```yaml
+backend: codex
+model: gpt-4.1
+skip-permissions: false
+```
+
+也可以通过 `--config /path/to/config.yaml` 显式指定。
+
+### 环境变量（`CODEAGENT_*`）
+
+通过 viper 读取并自动映射 `-` 为 `_`，常用项：
+
+- `CODEAGENT_BACKEND`（`codex|claude|gemini|opencode`）
+- `CODEAGENT_MODEL`
+- `CODEAGENT_AGENT`
+- `CODEAGENT_PROMPT_FILE`
+- `CODEAGENT_REASONING_EFFORT`
+- `CODEAGENT_SKIP_PERMISSIONS`
+- `CODEAGENT_FULL_OUTPUT`（并行模式 legacy 输出）
+- `CODEAGENT_MAX_PARALLEL_WORKERS`（0 表示不限制，上限 100）
+
+### Agent 预设（`~/.codeagent/models.json`）
+
+可在 `~/.codeagent/models.json` 定义 agent → backend/model/prompt 等映射，用 `--agent <name>` 选择：
+
+```json
+{
+  "default_backend": "opencode",
+  "default_model": "opencode/grok-code",
+  "agents": {
+    "develop": {
+      "backend": "codex",
+      "model": "gpt-4.1",
+      "prompt_file": "~/.codeagent/prompts/develop.md",
+      "description": "Code development"
+    }
+  }
+}
+```
+
+## 支持的后端
+
+该项目本身不内置模型能力，依赖你本机安装并可在 `PATH` 中找到对应 CLI：
+
+- `codex`：执行 `codex e ...`（默认会添加 `--dangerously-bypass-approvals-and-sandbox`；如需关闭请设置 `CODEX_BYPASS_SANDBOX=false`）
+- `claude`：执行 `claude -p ... --output-format stream-json`（默认会跳过权限提示；如需开启请设置 `CODEAGENT_SKIP_PERMISSIONS=false`）
+- `gemini`：执行 `gemini ... -o stream-json`（可从 `~/.gemini/.env` 加载环境变量）
+- `opencode`：执行 `opencode run --format json`
+
+## 开发
+
+```bash
+make build
+make test
+make lint
+make clean
+```
+
--- a/codeagent-wrapper/backend.go
+++ b/codeagent-wrapper/backend.go
@@ -1,135 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"os"
-	"path/filepath"
-)
-
-// Backend defines the contract for invoking different AI CLI backends.
-// Each backend is responsible for supplying the executable command and
-// building the argument list based on the wrapper config.
-type Backend interface {
-	Name() string
-	BuildArgs(cfg *Config, targetArg string) []string
-	Command() string
-}
-
-type CodexBackend struct{}
-
-func (CodexBackend) Name() string { return "codex" }
-func (CodexBackend) Command() string {
-	return "codex"
-}
-func (CodexBackend) BuildArgs(cfg *Config, targetArg string) []string {
-	return buildCodexArgs(cfg, targetArg)
-}
-
-type ClaudeBackend struct{}
-
-func (ClaudeBackend) Name() string { return "claude" }
-func (ClaudeBackend) Command() string {
-	return "claude"
-}
-func (ClaudeBackend) BuildArgs(cfg *Config, targetArg string) []string {
-	return buildClaudeArgs(cfg, targetArg)
-}
-
-const maxClaudeSettingsBytes = 1 << 20 // 1MB
-
-// loadMinimalEnvSettings 从 ~/.claude/settings.json 只提取 env 配置。
-// 只接受字符串类型的值；文件缺失/解析失败/超限都返回空。
-func loadMinimalEnvSettings() map[string]string {
-	home, err := os.UserHomeDir()
-	if err != nil || home == "" {
-		return nil
-	}
-
-	settingPath := filepath.Join(home, ".claude", "settings.json")
-	info, err := os.Stat(settingPath)
-	if err != nil || info.Size() > maxClaudeSettingsBytes {
-		return nil
-	}
-
-	data, err := os.ReadFile(settingPath)
-	if err != nil {
-		return nil
-	}
-
-	var cfg struct {
-		Env map[string]any `json:"env"`
-	}
-	if err := json.Unmarshal(data, &cfg); err != nil {
-		return nil
-	}
-	if len(cfg.Env) == 0 {
-		return nil
-	}
-
-	env := make(map[string]string, len(cfg.Env))
-	for k, v := range cfg.Env {
-		s, ok := v.(string)
-		if !ok {
-			continue
-		}
-		env[k] = s
-	}
-	if len(env) == 0 {
-		return nil
-	}
-	return env
-}
-
-func buildClaudeArgs(cfg *Config, targetArg string) []string {
-	if cfg == nil {
-		return nil
-	}
-	args := []string{"-p"}
-	if cfg.SkipPermissions {
-		args = append(args, "--dangerously-skip-permissions")
-	}
-
-	// Prevent infinite recursion: disable all setting sources (user, project, local)
-	// This ensures a clean execution environment without CLAUDE.md or skills that would trigger codeagent
-	args = append(args, "--setting-sources", "")
-
-	if cfg.Mode == "resume" {
-		if cfg.SessionID != "" {
-			// Claude CLI uses -r <session_id> for resume.
-			args = append(args, "-r", cfg.SessionID)
-		}
-	}
-	// Note: claude CLI doesn't support -C flag; workdir set via cmd.Dir
-
-	args = append(args, "--output-format", "stream-json", "--verbose", targetArg)
-
-	return args
-}
-
-type GeminiBackend struct{}
-
-func (GeminiBackend) Name() string { return "gemini" }
-func (GeminiBackend) Command() string {
-	return "gemini"
-}
-func (GeminiBackend) BuildArgs(cfg *Config, targetArg string) []string {
-	return buildGeminiArgs(cfg, targetArg)
-}
-
-func buildGeminiArgs(cfg *Config, targetArg string) []string {
-	if cfg == nil {
-		return nil
-	}
-	args := []string{"-o", "stream-json", "-y"}
-
-	if cfg.Mode == "resume" {
-		if cfg.SessionID != "" {
-			args = append(args, "-r", cfg.SessionID)
-		}
-	}
-	// Note: gemini CLI doesn't support -C flag; workdir set via cmd.Dir
-
-	args = append(args, "-p", targetArg)
-
-	return args
-}
--- a/codeagent-wrapper/bench_test.go
+++ b/codeagent-wrapper/bench_test.go
@@ -1,39 +0,0 @@
-package main
-
-import (
-	"testing"
-)
-
-// BenchmarkLoggerWrite 测试日志写入性能
-func BenchmarkLoggerWrite(b *testing.B) {
-	logger, err := NewLogger()
-	if err != nil {
-		b.Fatal(err)
-	}
-	defer logger.Close()
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		logger.Info("benchmark log message")
-	}
-	b.StopTimer()
-	logger.Flush()
-}
-
-// BenchmarkLoggerConcurrentWrite 测试并发日志写入性能
-func BenchmarkLoggerConcurrentWrite(b *testing.B) {
-	logger, err := NewLogger()
-	if err != nil {
-		b.Fatal(err)
-	}
-	defer logger.Close()
-
-	b.ResetTimer()
-	b.RunParallel(func(pb *testing.PB) {
-		for pb.Next() {
-			logger.Info("concurrent benchmark log message")
-		}
-	})
-	b.StopTimer()
-	logger.Flush()
-}
--- a/codeagent-wrapper/cmd/codeagent/main.go
+++ b/codeagent-wrapper/cmd/codeagent/main.go
@@ -0,0 +1,7 @@
+package main
+
+import app "codeagent-wrapper/internal/app"
+
+func main() {
+	app.Run()
+}
--- a/codeagent-wrapper/config.go
+++ b/codeagent-wrapper/config.go
@@ -1,287 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-)
-
-// Config holds CLI configuration
-type Config struct {
-	Mode               string // "new" or "resume"
-	Task               string
-	SessionID          string
-	WorkDir            string
-	ExplicitStdin      bool
-	Timeout            int
-	Backend            string
-	SkipPermissions    bool
-	MaxParallelWorkers int
-}
-
-// ParallelConfig defines the JSON schema for parallel execution
-type ParallelConfig struct {
-	Tasks         []TaskSpec `json:"tasks"`
-	GlobalBackend string     `json:"backend,omitempty"`
-}
-
-// TaskSpec describes an individual task entry in the parallel config
-type TaskSpec struct {
-	ID           string          `json:"id"`
-	Task         string          `json:"task"`
-	WorkDir      string          `json:"workdir,omitempty"`
-	Dependencies []string        `json:"dependencies,omitempty"`
-	SessionID    string          `json:"session_id,omitempty"`
-	Backend      string          `json:"backend,omitempty"`
-	Mode         string          `json:"-"`
-	UseStdin     bool            `json:"-"`
-	Context      context.Context `json:"-"`
-}
-
-// TaskResult captures the execution outcome of a task
-type TaskResult struct {
-	TaskID    string `json:"task_id"`
-	ExitCode  int    `json:"exit_code"`
-	Message   string `json:"message"`
-	SessionID string `json:"session_id"`
-	Error     string `json:"error"`
-	LogPath   string `json:"log_path"`
-	// Structured report fields
-	Coverage       string   `json:"coverage,omitempty"`        // extracted coverage percentage (e.g., "92%")
-	CoverageNum    float64  `json:"coverage_num,omitempty"`    // numeric coverage for comparison
-	CoverageTarget float64  `json:"coverage_target,omitempty"` // target coverage (default 90)
-	FilesChanged   []string `json:"files_changed,omitempty"`   // list of changed files
-	KeyOutput      string   `json:"key_output,omitempty"`      // brief summary of what was done
-	TestsPassed    int      `json:"tests_passed,omitempty"`    // number of tests passed
-	TestsFailed    int      `json:"tests_failed,omitempty"`    // number of tests failed
-	sharedLog      bool
-}
-
-var backendRegistry = map[string]Backend{
-	"codex":  CodexBackend{},
-	"claude": ClaudeBackend{},
-	"gemini": GeminiBackend{},
-}
-
-func selectBackend(name string) (Backend, error) {
-	key := strings.ToLower(strings.TrimSpace(name))
-	if key == "" {
-		key = defaultBackendName
-	}
-	if backend, ok := backendRegistry[key]; ok {
-		return backend, nil
-	}
-	return nil, fmt.Errorf("unsupported backend %q", name)
-}
-
-func envFlagEnabled(key string) bool {
-	val, ok := os.LookupEnv(key)
-	if !ok {
-		return false
-	}
-	val = strings.TrimSpace(strings.ToLower(val))
-	switch val {
-	case "", "0", "false", "no", "off":
-		return false
-	default:
-		return true
-	}
-}
-
-func parseBoolFlag(val string, defaultValue bool) bool {
-	val = strings.TrimSpace(strings.ToLower(val))
-	switch val {
-	case "1", "true", "yes", "on":
-		return true
-	case "0", "false", "no", "off":
-		return false
-	default:
-		return defaultValue
-	}
-}
-
-func parseParallelConfig(data []byte) (*ParallelConfig, error) {
-	trimmed := bytes.TrimSpace(data)
-	if len(trimmed) == 0 {
-		return nil, fmt.Errorf("parallel config is empty")
-	}
-
-	tasks := strings.Split(string(trimmed), "---TASK---")
-	var cfg ParallelConfig
-	seen := make(map[string]struct{})
-
-	taskIndex := 0
-	for _, taskBlock := range tasks {
-		taskBlock = strings.TrimSpace(taskBlock)
-		if taskBlock == "" {
-			continue
-		}
-		taskIndex++
-
-		parts := strings.SplitN(taskBlock, "---CONTENT---", 2)
-		if len(parts) != 2 {
-			return nil, fmt.Errorf("task block #%d missing ---CONTENT--- separator", taskIndex)
-		}
-
-		meta := strings.TrimSpace(parts[0])
-		content := strings.TrimSpace(parts[1])
-
-		task := TaskSpec{WorkDir: defaultWorkdir}
-		for _, line := range strings.Split(meta, "\n") {
-			line = strings.TrimSpace(line)
-			if line == "" {
-				continue
-			}
-			kv := strings.SplitN(line, ":", 2)
-			if len(kv) != 2 {
-				continue
-			}
-			key := strings.TrimSpace(kv[0])
-			value := strings.TrimSpace(kv[1])
-
-			switch key {
-			case "id":
-				task.ID = value
-			case "workdir":
-				task.WorkDir = value
-			case "session_id":
-				task.SessionID = value
-				task.Mode = "resume"
-			case "backend":
-				task.Backend = value
-			case "dependencies":
-				for _, dep := range strings.Split(value, ",") {
-					dep = strings.TrimSpace(dep)
-					if dep != "" {
-						task.Dependencies = append(task.Dependencies, dep)
-					}
-				}
-			}
-		}
-
-		if task.Mode == "" {
-			task.Mode = "new"
-		}
-
-		if task.ID == "" {
-			return nil, fmt.Errorf("task block #%d missing id field", taskIndex)
-		}
-		if content == "" {
-			return nil, fmt.Errorf("task block #%d (%q) missing content", taskIndex, task.ID)
-		}
-		if task.Mode == "resume" && strings.TrimSpace(task.SessionID) == "" {
-			return nil, fmt.Errorf("task block #%d (%q) has empty session_id", taskIndex, task.ID)
-		}
-		if _, exists := seen[task.ID]; exists {
-			return nil, fmt.Errorf("task block #%d has duplicate id: %s", taskIndex, task.ID)
-		}
-
-		task.Task = content
-		cfg.Tasks = append(cfg.Tasks, task)
-		seen[task.ID] = struct{}{}
-	}
-
-	if len(cfg.Tasks) == 0 {
-		return nil, fmt.Errorf("no tasks found")
-	}
-
-	return &cfg, nil
-}
-
-func parseArgs() (*Config, error) {
-	args := os.Args[1:]
-	if len(args) == 0 {
-		return nil, fmt.Errorf("task required")
-	}
-
-	backendName := defaultBackendName
-	skipPermissions := envFlagEnabled("CODEAGENT_SKIP_PERMISSIONS")
-	filtered := make([]string, 0, len(args))
-	for i := 0; i < len(args); i++ {
-		arg := args[i]
-		switch {
-		case arg == "--backend":
-			if i+1 >= len(args) {
-				return nil, fmt.Errorf("--backend flag requires a value")
-			}
-			backendName = args[i+1]
-			i++
-			continue
-		case strings.HasPrefix(arg, "--backend="):
-			value := strings.TrimPrefix(arg, "--backend=")
-			if value == "" {
-				return nil, fmt.Errorf("--backend flag requires a value")
-			}
-			backendName = value
-			continue
-		case arg == "--skip-permissions", arg == "--dangerously-skip-permissions":
-			skipPermissions = true
-			continue
-		case strings.HasPrefix(arg, "--skip-permissions="):
-			skipPermissions = parseBoolFlag(strings.TrimPrefix(arg, "--skip-permissions="), skipPermissions)
-			continue
-		case strings.HasPrefix(arg, "--dangerously-skip-permissions="):
-			skipPermissions = parseBoolFlag(strings.TrimPrefix(arg, "--dangerously-skip-permissions="), skipPermissions)
-			continue
-		}
-		filtered = append(filtered, arg)
-	}
-
-	if len(filtered) == 0 {
-		return nil, fmt.Errorf("task required")
-	}
-	args = filtered
-
-	cfg := &Config{WorkDir: defaultWorkdir, Backend: backendName, SkipPermissions: skipPermissions}
-	cfg.MaxParallelWorkers = resolveMaxParallelWorkers()
-
-	if args[0] == "resume" {
-		if len(args) < 3 {
-			return nil, fmt.Errorf("resume mode requires: resume <session_id> <task>")
-		}
-		cfg.Mode = "resume"
-		cfg.SessionID = strings.TrimSpace(args[1])
-		if cfg.SessionID == "" {
-			return nil, fmt.Errorf("resume mode requires non-empty session_id")
-		}
-		cfg.Task = args[2]
-		cfg.ExplicitStdin = (args[2] == "-")
-		if len(args) > 3 {
-			cfg.WorkDir = args[3]
-		}
-	} else {
-		cfg.Mode = "new"
-		cfg.Task = args[0]
-		cfg.ExplicitStdin = (args[0] == "-")
-		if len(args) > 1 {
-			cfg.WorkDir = args[1]
-		}
-	}
-
-	return cfg, nil
-}
-
-const maxParallelWorkersLimit = 100
-
-func resolveMaxParallelWorkers() int {
-	raw := strings.TrimSpace(os.Getenv("CODEAGENT_MAX_PARALLEL_WORKERS"))
-	if raw == "" {
-		return 0
-	}
-
-	value, err := strconv.Atoi(raw)
-	if err != nil || value < 0 {
-		logWarn(fmt.Sprintf("Invalid CODEAGENT_MAX_PARALLEL_WORKERS=%q, falling back to unlimited", raw))
-		return 0
-	}
-
-	if value > maxParallelWorkersLimit {
-		logWarn(fmt.Sprintf("CODEAGENT_MAX_PARALLEL_WORKERS=%d exceeds limit, capping at %d", value, maxParallelWorkersLimit))
-		return maxParallelWorkersLimit
-	}
-
-	return value
-}
--- a/codeagent-wrapper/go.mod
+++ b/codeagent-wrapper/go.mod
@@ -1,3 +1,43 @@
 module codeagent-wrapper

 go 1.21
+
+require (
+	github.com/goccy/go-json v0.10.5
+	github.com/rs/zerolog v1.34.0
+	github.com/shirou/gopsutil/v3 v3.24.5
+	github.com/spf13/cobra v1.8.1
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.19.0
+)
+
+require (
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/shoenig/go-m1cpu v0.1.6 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
--- a/codeagent-wrapper/go.sum
+++ b/codeagent-wrapper/go.sum
@@ -0,0 +1,117 @@
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
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--- a/codeagent-wrapper/internal/app/agent_validation_test.go
+++ b/codeagent-wrapper/internal/app/agent_validation_test.go
@@ -0,0 +1,150 @@
+package wrapper
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	config "codeagent-wrapper/internal/config"
+	executor "codeagent-wrapper/internal/executor"
+)
+
+func TestValidateAgentName(t *testing.T) {
+	tests := []struct {
+		name    string
+		input   string
+		wantErr bool
+	}{
+		{name: "simple", input: "develop", wantErr: false},
+		{name: "upper", input: "ABC", wantErr: false},
+		{name: "digits", input: "a1", wantErr: false},
+		{name: "dash underscore", input: "a-b_c", wantErr: false},
+		{name: "empty", input: "", wantErr: true},
+		{name: "space", input: "a b", wantErr: true},
+		{name: "slash", input: "a/b", wantErr: true},
+		{name: "dotdot", input: "../evil", wantErr: true},
+		{name: "unicode", input: "中文", wantErr: true},
+		{name: "symbol", input: "a$b", wantErr: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := config.ValidateAgentName(tt.input)
+			if (err != nil) != tt.wantErr {
+				t.Fatalf("validateAgentName(%q) err=%v, wantErr=%v", tt.input, err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestParseArgs_InvalidAgentNameRejected(t *testing.T) {
+	defer resetTestHooks()
+	os.Args = []string{"codeagent-wrapper", "--agent", "../evil", "task"}
+	if _, err := parseArgs(); err == nil {
+		t.Fatalf("expected parseArgs to reject invalid agent name")
+	}
+}
+
+func TestParseParallelConfig_InvalidAgentNameRejected(t *testing.T) {
+	input := `---TASK---
+id: task-1
+agent: ../evil
+---CONTENT---
+do something`
+	if _, err := parseParallelConfig([]byte(input)); err == nil {
+		t.Fatalf("expected parseParallelConfig to reject invalid agent name")
+	}
+}
+
+func TestParseParallelConfig_ResolvesAgentPromptFile(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+	t.Cleanup(config.ResetModelsConfigCacheForTest)
+	config.ResetModelsConfigCacheForTest()
+
+	configDir := filepath.Join(home, ".codeagent")
+	if err := os.MkdirAll(configDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(configDir, "models.json"), []byte(`{
+  "default_backend": "codex",
+  "default_model": "gpt-test",
+  "agents": {
+    "custom-agent": {
+      "backend": "codex",
+      "model": "gpt-test",
+      "prompt_file": "~/.claude/prompt.md"
+    }
+  }
+}`), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	input := `---TASK---
+id: task-1
+agent: custom-agent
+---CONTENT---
+do something`
+	cfg, err := parseParallelConfig([]byte(input))
+	if err != nil {
+		t.Fatalf("parseParallelConfig() unexpected error: %v", err)
+	}
+	if len(cfg.Tasks) != 1 {
+		t.Fatalf("expected 1 task, got %d", len(cfg.Tasks))
+	}
+	if got := cfg.Tasks[0].PromptFile; got != "~/.claude/prompt.md" {
+		t.Fatalf("PromptFile = %q, want %q", got, "~/.claude/prompt.md")
+	}
+}
+
+func TestDefaultRunCodexTaskFn_AppliesAgentPromptFile(t *testing.T) {
+	defer resetTestHooks()
+
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	claudeDir := filepath.Join(home, ".claude")
+	if err := os.MkdirAll(claudeDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(claudeDir, "prompt.md"), []byte("P\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	fake := newFakeCmd(fakeCmdConfig{
+		StdoutPlan: []fakeStdoutEvent{
+			{Data: `{"type":"item.completed","item":{"type":"agent_message","text":"ok"}}` + "\n"},
+		},
+		WaitDelay: 2 * time.Millisecond,
+	})
+
+	_ = executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner { return fake })
+	_ = executor.SetSelectBackendFn(func(name string) (Backend, error) {
+		return testBackend{
+			name:    name,
+			command: "fake-cmd",
+			argsFn: func(cfg *Config, targetArg string) []string {
+				return []string{targetArg}
+			},
+		}, nil
+	})
+
+	res := defaultRunCodexTaskFn(TaskSpec{
+		ID:         "t",
+		Task:       "do",
+		Backend:    "codex",
+		PromptFile: "~/.claude/prompt.md",
+	}, 5)
+	if res.ExitCode != 0 {
+		t.Fatalf("unexpected result: %+v", res)
+	}
+
+	want := "<agent-prompt>\nP\n</agent-prompt>\n\ndo"
+	if got := fake.StdinContents(); got != want {
+		t.Fatalf("stdin mismatch:\n got=%q\nwant=%q", got, want)
+	}
+}
--- a/codeagent-wrapper/internal/app/app.go
+++ b/codeagent-wrapper/internal/app/app.go
@@ -0,0 +1,278 @@
+package wrapper
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+const (
+	version               = "6.0.0-alpha1"
+	defaultWorkdir        = "."
+	defaultTimeout        = 7200 // seconds (2 hours)
+	defaultCoverageTarget = 90.0
+	codexLogLineLimit     = 1000
+	stdinSpecialChars     = "\n\\\"'`$"
+	stderrCaptureLimit    = 4 * 1024
+	defaultBackendName    = "codex"
+	defaultCodexCommand   = "codex"
+
+	// stdout close reasons
+	stdoutCloseReasonWait  = "wait-done"
+	stdoutCloseReasonDrain = "drain-timeout"
+	stdoutCloseReasonCtx   = "context-cancel"
+	stdoutDrainTimeout     = 100 * time.Millisecond
+)
+
+// Test hooks for dependency injection
+var (
+	stdinReader         io.Reader = os.Stdin
+	isTerminalFn                  = defaultIsTerminal
+	codexCommand                  = defaultCodexCommand
+	cleanupHook         func()
+	startupCleanupAsync = true
+
+	buildCodexArgsFn   = buildCodexArgs
+	selectBackendFn    = selectBackend
+	cleanupLogsFn      = cleanupOldLogs
+	defaultBuildArgsFn = buildCodexArgs
+	runTaskFn          = runCodexTask
+	exitFn             = os.Exit
+)
+
+func runStartupCleanup() {
+	if cleanupLogsFn == nil {
+		return
+	}
+	defer func() {
+		if r := recover(); r != nil {
+			logWarn(fmt.Sprintf("cleanupOldLogs panic: %v", r))
+		}
+	}()
+	if _, err := cleanupLogsFn(); err != nil {
+		logWarn(fmt.Sprintf("cleanupOldLogs error: %v", err))
+	}
+}
+
+func scheduleStartupCleanup() {
+	if !startupCleanupAsync {
+		runStartupCleanup()
+		return
+	}
+	if cleanupLogsFn == nil {
+		return
+	}
+	fn := cleanupLogsFn
+	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				logWarn(fmt.Sprintf("cleanupOldLogs panic: %v", r))
+			}
+		}()
+		if _, err := fn(); err != nil {
+			logWarn(fmt.Sprintf("cleanupOldLogs error: %v", err))
+		}
+	}()
+}
+
+func runCleanupMode() int {
+	if cleanupLogsFn == nil {
+		fmt.Fprintln(os.Stderr, "Cleanup failed: log cleanup function not configured")
+		return 1
+	}
+
+	stats, err := cleanupLogsFn()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Cleanup failed: %v\n", err)
+		return 1
+	}
+
+	fmt.Println("Cleanup completed")
+	fmt.Printf("Files scanned: %d\n", stats.Scanned)
+	fmt.Printf("Files deleted: %d\n", stats.Deleted)
+	if len(stats.DeletedFiles) > 0 {
+		for _, f := range stats.DeletedFiles {
+			fmt.Printf("  - %s\n", f)
+		}
+	}
+	fmt.Printf("Files kept: %d\n", stats.Kept)
+	if len(stats.KeptFiles) > 0 {
+		for _, f := range stats.KeptFiles {
+			fmt.Printf("  - %s\n", f)
+		}
+	}
+	if stats.Errors > 0 {
+		fmt.Printf("Deletion errors: %d\n", stats.Errors)
+	}
+	return 0
+}
+
+func readAgentPromptFile(path string, allowOutsideClaudeDir bool) (string, error) {
+	raw := strings.TrimSpace(path)
+	if raw == "" {
+		return "", nil
+	}
+
+	expanded := raw
+	if raw == "~" || strings.HasPrefix(raw, "~/") || strings.HasPrefix(raw, "~\\") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return "", err
+		}
+		if raw == "~" {
+			expanded = home
+		} else {
+			expanded = home + raw[1:]
+		}
+	}
+
+	absPath, err := filepath.Abs(expanded)
+	if err != nil {
+		return "", err
+	}
+	absPath = filepath.Clean(absPath)
+
+	home, err := os.UserHomeDir()
+	if err != nil {
+		if !allowOutsideClaudeDir {
+			return "", err
+		}
+		logWarn(fmt.Sprintf("Failed to resolve home directory for prompt file validation: %v; proceeding without restriction", err))
+	} else {
+		allowedDirs := []string{
+			filepath.Clean(filepath.Join(home, ".claude")),
+			filepath.Clean(filepath.Join(home, ".codeagent", "agents")),
+		}
+		for i := range allowedDirs {
+			allowedAbs, err := filepath.Abs(allowedDirs[i])
+			if err == nil {
+				allowedDirs[i] = filepath.Clean(allowedAbs)
+			}
+		}
+
+		isWithinDir := func(path, dir string) bool {
+			rel, err := filepath.Rel(dir, path)
+			if err != nil {
+				return false
+			}
+			rel = filepath.Clean(rel)
+			if rel == "." {
+				return true
+			}
+			if rel == ".." {
+				return false
+			}
+			prefix := ".." + string(os.PathSeparator)
+			return !strings.HasPrefix(rel, prefix)
+		}
+
+		if !allowOutsideClaudeDir {
+			withinAllowed := false
+			for _, dir := range allowedDirs {
+				if isWithinDir(absPath, dir) {
+					withinAllowed = true
+					break
+				}
+			}
+			if !withinAllowed {
+				logWarn(fmt.Sprintf("Refusing to read prompt file outside allowed dirs (%s): %s", strings.Join(allowedDirs, ", "), absPath))
+				return "", fmt.Errorf("prompt file must be under ~/.claude or ~/.codeagent/agents")
+			}
+
+			resolvedPath, errPath := filepath.EvalSymlinks(absPath)
+			if errPath == nil {
+				resolvedPath = filepath.Clean(resolvedPath)
+				resolvedAllowed := make([]string, 0, len(allowedDirs))
+				for _, dir := range allowedDirs {
+					resolvedBase, errBase := filepath.EvalSymlinks(dir)
+					if errBase != nil {
+						continue
+					}
+					resolvedAllowed = append(resolvedAllowed, filepath.Clean(resolvedBase))
+				}
+				if len(resolvedAllowed) > 0 {
+					withinResolved := false
+					for _, dir := range resolvedAllowed {
+						if isWithinDir(resolvedPath, dir) {
+							withinResolved = true
+							break
+						}
+					}
+					if !withinResolved {
+						logWarn(fmt.Sprintf("Refusing to read prompt file outside allowed dirs (%s) (resolved): %s", strings.Join(resolvedAllowed, ", "), resolvedPath))
+						return "", fmt.Errorf("prompt file must be under ~/.claude or ~/.codeagent/agents")
+					}
+				}
+			}
+		} else {
+			withinAllowed := false
+			for _, dir := range allowedDirs {
+				if isWithinDir(absPath, dir) {
+					withinAllowed = true
+					break
+				}
+			}
+			if !withinAllowed {
+				logWarn(fmt.Sprintf("Reading prompt file outside allowed dirs (%s): %s", strings.Join(allowedDirs, ", "), absPath))
+			}
+		}
+	}
+
+	data, err := os.ReadFile(absPath)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimRight(string(data), "\r\n"), nil
+}
+
+func wrapTaskWithAgentPrompt(prompt string, task string) string {
+	return "<agent-prompt>\n" + prompt + "\n</agent-prompt>\n\n" + task
+}
+
+func runCleanupHook() {
+	if logger := activeLogger(); logger != nil {
+		logger.Flush()
+	}
+	if cleanupHook != nil {
+		cleanupHook()
+	}
+}
+
+func printHelp() {
+	name := currentWrapperName()
+	help := fmt.Sprintf(`%[1]s - Go wrapper for AI CLI backends
+
+Usage:
+    %[1]s "task" [workdir]
+    %[1]s --backend claude "task" [workdir]
+    %[1]s --prompt-file /path/to/prompt.md "task" [workdir]
+    %[1]s - [workdir]              Read task from stdin
+    %[1]s resume <session_id> "task" [workdir]
+    %[1]s resume <session_id> - [workdir]
+    %[1]s --parallel               Run tasks in parallel (config from stdin)
+    %[1]s --parallel --full-output Run tasks in parallel with full output (legacy)
+    %[1]s --version
+    %[1]s --help
+
+Parallel mode examples:
+    %[1]s --parallel < tasks.txt
+    echo '...' | %[1]s --parallel
+    %[1]s --parallel --full-output < tasks.txt
+    %[1]s --parallel <<'EOF'
+
+Environment Variables:
+    CODEX_TIMEOUT         Timeout in milliseconds (default: 7200000)
+    CODEAGENT_ASCII_MODE  Use ASCII symbols instead of Unicode (PASS/WARN/FAIL)
+
+Exit Codes:
+    0    Success
+    1    General error (missing args, no output)
+    124  Timeout
+    127  backend command not found
+    130  Interrupted (Ctrl+C)
+    *    Passthrough from backend process`, name)
+	fmt.Println(help)
+}
--- a/codeagent-wrapper/internal/app/backend.go
+++ b/codeagent-wrapper/internal/app/backend.go
@@ -0,0 +1,9 @@
+package wrapper
+
+import backend "codeagent-wrapper/internal/backend"
+
+type Backend = backend.Backend
+type CodexBackend = backend.CodexBackend
+type ClaudeBackend = backend.ClaudeBackend
+type GeminiBackend = backend.GeminiBackend
+type OpencodeBackend = backend.OpencodeBackend
--- a/codeagent-wrapper/internal/app/backend_init.go
+++ b/codeagent-wrapper/internal/app/backend_init.go
@@ -0,0 +1,7 @@
+package wrapper
+
+import backend "codeagent-wrapper/internal/backend"
+
+func init() {
+	backend.SetLogFuncs(logWarn, logError)
+}
--- a/codeagent-wrapper/internal/app/backend_registry.go
+++ b/codeagent-wrapper/internal/app/backend_registry.go
@@ -0,0 +1,5 @@
+package wrapper
+
+import backend "codeagent-wrapper/internal/backend"
+
+func selectBackend(name string) (Backend, error) { return backend.Select(name) }
--- a/codeagent-wrapper/internal/app/bench_test.go
+++ b/codeagent-wrapper/internal/app/bench_test.go
@@ -0,0 +1,103 @@
+package wrapper
+
+import (
+	"bytes"
+	"os"
+	"testing"
+
+	config "codeagent-wrapper/internal/config"
+)
+
+var (
+	benchCmdSink      any
+	benchConfigSink   *Config
+	benchMessageSink  string
+	benchThreadIDSink string
+)
+
+// BenchmarkStartup_NewRootCommand measures CLI startup overhead (command+flags construction).
+func BenchmarkStartup_NewRootCommand(b *testing.B) {
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		benchCmdSink = newRootCommand()
+	}
+}
+
+// BenchmarkConfigParse_ParseArgs measures config parsing from argv/env (steady-state).
+func BenchmarkConfigParse_ParseArgs(b *testing.B) {
+	home := b.TempDir()
+	b.Setenv("HOME", home)
+	b.Setenv("USERPROFILE", home)
+
+	config.ResetModelsConfigCacheForTest()
+	b.Cleanup(config.ResetModelsConfigCacheForTest)
+
+	origArgs := os.Args
+	os.Args = []string{"codeagent-wrapper", "--agent", "develop", "task"}
+	b.Cleanup(func() { os.Args = origArgs })
+
+	if _, err := parseArgs(); err != nil {
+		b.Fatalf("warmup parseArgs() error: %v", err)
+	}
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		cfg, err := parseArgs()
+		if err != nil {
+			b.Fatalf("parseArgs() error: %v", err)
+		}
+		benchConfigSink = cfg
+	}
+}
+
+// BenchmarkJSONParse_ParseJSONStreamInternal measures line-delimited JSON stream parsing.
+func BenchmarkJSONParse_ParseJSONStreamInternal(b *testing.B) {
+	stream := []byte(
+		`{"type":"thread.started","thread_id":"t"}` + "\n" +
+			`{"type":"item.completed","item":{"type":"agent_message","text":"hello"}}` + "\n" +
+			`{"type":"thread.completed","thread_id":"t"}` + "\n",
+	)
+	b.SetBytes(int64(len(stream)))
+
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		message, threadID := parseJSONStreamInternal(bytes.NewReader(stream), nil, nil, nil, nil)
+		benchMessageSink = message
+		benchThreadIDSink = threadID
+	}
+}
+
+// BenchmarkLoggerWrite 测试日志写入性能
+func BenchmarkLoggerWrite(b *testing.B) {
+	logger, err := NewLogger()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer logger.Close()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		logger.Info("benchmark log message")
+	}
+	b.StopTimer()
+	logger.Flush()
+}
+
+// BenchmarkLoggerConcurrentWrite 测试并发日志写入性能
+func BenchmarkLoggerConcurrentWrite(b *testing.B) {
+	logger, err := NewLogger()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer logger.Close()
+
+	b.ResetTimer()
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			logger.Info("concurrent benchmark log message")
+		}
+	})
+	b.StopTimer()
+	logger.Flush()
+}
--- a/codeagent-wrapper/internal/app/cli.go
+++ b/codeagent-wrapper/internal/app/cli.go
@@ -0,0 +1,663 @@
+package wrapper
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+type exitError struct {
+	code int
+}
+
+func (e exitError) Error() string {
+	return fmt.Sprintf("exit %d", e.code)
+}
+
+type cliOptions struct {
+	Backend         string
+	Model           string
+	ReasoningEffort string
+	Agent           string
+	PromptFile      string
+	SkipPermissions bool
+
+	Parallel   bool
+	FullOutput bool
+
+	Cleanup    bool
+	Version    bool
+	ConfigFile string
+}
+
+func Main() {
+	Run()
+}
+
+// Run is the program entrypoint for cmd/codeagent/main.go.
+func Run() {
+	exitFn(run())
+}
+
+func run() int {
+	cmd := newRootCommand()
+	cmd.SetArgs(os.Args[1:])
+	if err := cmd.Execute(); err != nil {
+		var ee exitError
+		if errors.As(err, &ee) {
+			return ee.code
+		}
+		return 1
+	}
+	return 0
+}
+
+func newRootCommand() *cobra.Command {
+	name := currentWrapperName()
+	opts := &cliOptions{}
+
+	cmd := &cobra.Command{
+		Use:           fmt.Sprintf("%s [flags] <task>|resume <session_id> <task> [workdir]", name),
+		Short:         "Go wrapper for AI CLI backends",
+		SilenceErrors: true,
+		SilenceUsage:  true,
+		Args:          cobra.ArbitraryArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if opts.Version {
+				fmt.Printf("%s version %s\n", name, version)
+				return nil
+			}
+			if opts.Cleanup {
+				code := runCleanupMode()
+				if code == 0 {
+					return nil
+				}
+				return exitError{code: code}
+			}
+
+			exitCode := runWithLoggerAndCleanup(func() int {
+				v, err := config.NewViper(opts.ConfigFile)
+				if err != nil {
+					logError(err.Error())
+					return 1
+				}
+
+				if opts.Parallel {
+					return runParallelMode(cmd, args, opts, v, name)
+				}
+
+				logInfo("Script started")
+
+				cfg, err := buildSingleConfig(cmd, args, os.Args[1:], opts, v)
+				if err != nil {
+					logError(err.Error())
+					return 1
+				}
+				logInfo(fmt.Sprintf("Parsed args: mode=%s, task_len=%d, backend=%s", cfg.Mode, len(cfg.Task), cfg.Backend))
+				return runSingleMode(cfg, name)
+			})
+
+			if exitCode == 0 {
+				return nil
+			}
+			return exitError{code: exitCode}
+		},
+	}
+	cmd.CompletionOptions.DisableDefaultCmd = true
+
+	addRootFlags(cmd.Flags(), opts)
+	cmd.AddCommand(newVersionCommand(name), newCleanupCommand())
+
+	return cmd
+}
+
+func addRootFlags(fs *pflag.FlagSet, opts *cliOptions) {
+	fs.StringVar(&opts.ConfigFile, "config", "", "Config file path (default: $HOME/.codeagent/config.*)")
+	fs.BoolVarP(&opts.Version, "version", "v", false, "Print version and exit")
+	fs.BoolVar(&opts.Cleanup, "cleanup", false, "Clean up old logs and exit")
+
+	fs.BoolVar(&opts.Parallel, "parallel", false, "Run tasks in parallel (config from stdin)")
+	fs.BoolVar(&opts.FullOutput, "full-output", false, "Parallel mode: include full task output (legacy)")
+
+	fs.StringVar(&opts.Backend, "backend", defaultBackendName, "Backend to use (codex, claude, gemini, opencode)")
+	fs.StringVar(&opts.Model, "model", "", "Model override")
+	fs.StringVar(&opts.ReasoningEffort, "reasoning-effort", "", "Reasoning effort (backend-specific)")
+	fs.StringVar(&opts.Agent, "agent", "", "Agent preset name (from ~/.codeagent/models.json)")
+	fs.StringVar(&opts.PromptFile, "prompt-file", "", "Prompt file path")
+
+	fs.BoolVar(&opts.SkipPermissions, "skip-permissions", false, "Skip permissions prompts (also via CODEAGENT_SKIP_PERMISSIONS)")
+	fs.BoolVar(&opts.SkipPermissions, "dangerously-skip-permissions", false, "Alias for --skip-permissions")
+}
+
+func newVersionCommand(name string) *cobra.Command {
+	return &cobra.Command{
+		Use:           "version",
+		Short:         "Print version and exit",
+		SilenceErrors: true,
+		SilenceUsage:  true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			fmt.Printf("%s version %s\n", name, version)
+			return nil
+		},
+	}
+}
+
+func newCleanupCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:           "cleanup",
+		Short:         "Clean up old logs and exit",
+		SilenceErrors: true,
+		SilenceUsage:  true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			code := runCleanupMode()
+			if code == 0 {
+				return nil
+			}
+			return exitError{code: code}
+		},
+	}
+}
+
+func runWithLoggerAndCleanup(fn func() int) (exitCode int) {
+	logger, err := NewLogger()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: failed to initialize logger: %v\n", err)
+		return 1
+	}
+	setLogger(logger)
+
+	defer func() {
+		logger := activeLogger()
+		if logger != nil {
+			logger.Flush()
+		}
+		if err := closeLogger(); err != nil {
+			fmt.Fprintf(os.Stderr, "ERROR: failed to close logger: %v\n", err)
+		}
+		if logger == nil {
+			return
+		}
+
+		if exitCode != 0 {
+			if entries := logger.ExtractRecentErrors(10); len(entries) > 0 {
+				fmt.Fprintln(os.Stderr, "\n=== Recent Errors ===")
+				for _, entry := range entries {
+					fmt.Fprintln(os.Stderr, entry)
+				}
+				fmt.Fprintf(os.Stderr, "Log file: %s (deleted)\n", logger.Path())
+			}
+		}
+		_ = logger.RemoveLogFile()
+	}()
+	defer runCleanupHook()
+
+	// Clean up stale logs from previous runs.
+	scheduleStartupCleanup()
+
+	return fn()
+}
+
+func parseArgs() (*Config, error) {
+	opts := &cliOptions{}
+	cmd := &cobra.Command{SilenceErrors: true, SilenceUsage: true, Args: cobra.ArbitraryArgs}
+	addRootFlags(cmd.Flags(), opts)
+
+	rawArgv := os.Args[1:]
+	if err := cmd.ParseFlags(rawArgv); err != nil {
+		return nil, err
+	}
+	args := cmd.Flags().Args()
+
+	v, err := config.NewViper(opts.ConfigFile)
+	if err != nil {
+		return nil, err
+	}
+
+	return buildSingleConfig(cmd, args, rawArgv, opts, v)
+}
+
+func buildSingleConfig(cmd *cobra.Command, args []string, rawArgv []string, opts *cliOptions, v *viper.Viper) (*Config, error) {
+	backendName := defaultBackendName
+	model := ""
+	reasoningEffort := ""
+	agentName := ""
+	promptFile := ""
+	promptFileExplicit := false
+	yolo := false
+
+	if cmd.Flags().Changed("agent") {
+		agentName = strings.TrimSpace(opts.Agent)
+		if agentName == "" {
+			return nil, fmt.Errorf("--agent flag requires a value")
+		}
+		if err := config.ValidateAgentName(agentName); err != nil {
+			return nil, fmt.Errorf("--agent flag invalid value: %w", err)
+		}
+	} else {
+		agentName = strings.TrimSpace(v.GetString("agent"))
+		if agentName != "" {
+			if err := config.ValidateAgentName(agentName); err != nil {
+				return nil, fmt.Errorf("--agent flag invalid value: %w", err)
+			}
+		}
+	}
+
+	var resolvedBackend, resolvedModel, resolvedPromptFile, resolvedReasoning string
+	if agentName != "" {
+		var resolvedYolo bool
+		resolvedBackend, resolvedModel, resolvedPromptFile, resolvedReasoning, _, _, resolvedYolo = config.ResolveAgentConfig(agentName)
+		yolo = resolvedYolo
+	}
+
+	if cmd.Flags().Changed("prompt-file") {
+		promptFile = strings.TrimSpace(opts.PromptFile)
+		if promptFile == "" {
+			return nil, fmt.Errorf("--prompt-file flag requires a value")
+		}
+		promptFileExplicit = true
+	} else if val := strings.TrimSpace(v.GetString("prompt-file")); val != "" {
+		promptFile = val
+		promptFileExplicit = true
+	} else {
+		promptFile = resolvedPromptFile
+	}
+
+	agentFlagChanged := cmd.Flags().Changed("agent")
+	backendFlagChanged := cmd.Flags().Changed("backend")
+	if backendFlagChanged {
+		backendName = strings.TrimSpace(opts.Backend)
+		if backendName == "" {
+			return nil, fmt.Errorf("--backend flag requires a value")
+		}
+	}
+
+	switch {
+	case agentFlagChanged && backendFlagChanged && lastFlagIndex(rawArgv, "agent") > lastFlagIndex(rawArgv, "backend"):
+		backendName = resolvedBackend
+	case !backendFlagChanged && agentName != "":
+		backendName = resolvedBackend
+	case !backendFlagChanged:
+		if val := strings.TrimSpace(v.GetString("backend")); val != "" {
+			backendName = val
+		}
+	}
+
+	modelFlagChanged := cmd.Flags().Changed("model")
+	if modelFlagChanged {
+		model = strings.TrimSpace(opts.Model)
+		if model == "" {
+			return nil, fmt.Errorf("--model flag requires a value")
+		}
+	}
+
+	switch {
+	case agentFlagChanged && modelFlagChanged && lastFlagIndex(rawArgv, "agent") > lastFlagIndex(rawArgv, "model"):
+		model = strings.TrimSpace(resolvedModel)
+	case !modelFlagChanged && agentName != "":
+		model = strings.TrimSpace(resolvedModel)
+	case !modelFlagChanged:
+		model = strings.TrimSpace(v.GetString("model"))
+	}
+
+	if cmd.Flags().Changed("reasoning-effort") {
+		reasoningEffort = strings.TrimSpace(opts.ReasoningEffort)
+		if reasoningEffort == "" {
+			return nil, fmt.Errorf("--reasoning-effort flag requires a value")
+		}
+	} else if val := strings.TrimSpace(v.GetString("reasoning-effort")); val != "" {
+		reasoningEffort = val
+	} else if agentName != "" {
+		reasoningEffort = strings.TrimSpace(resolvedReasoning)
+	}
+
+	skipChanged := cmd.Flags().Changed("skip-permissions") || cmd.Flags().Changed("dangerously-skip-permissions")
+	skipPermissions := false
+	if skipChanged {
+		skipPermissions = opts.SkipPermissions
+	} else {
+		skipPermissions = v.GetBool("skip-permissions")
+	}
+
+	if len(args) == 0 {
+		return nil, fmt.Errorf("task required")
+	}
+
+	cfg := &Config{
+		WorkDir:            defaultWorkdir,
+		Backend:            backendName,
+		Agent:              agentName,
+		PromptFile:         promptFile,
+		PromptFileExplicit: promptFileExplicit,
+		SkipPermissions:    skipPermissions,
+		Yolo:               yolo,
+		Model:              model,
+		ReasoningEffort:    reasoningEffort,
+		MaxParallelWorkers: config.ResolveMaxParallelWorkers(),
+	}
+
+	if args[0] == "resume" {
+		if len(args) < 3 {
+			return nil, fmt.Errorf("resume mode requires: resume <session_id> <task>")
+		}
+		cfg.Mode = "resume"
+		cfg.SessionID = strings.TrimSpace(args[1])
+		if cfg.SessionID == "" {
+			return nil, fmt.Errorf("resume mode requires non-empty session_id")
+		}
+		cfg.Task = args[2]
+		cfg.ExplicitStdin = (args[2] == "-")
+		if len(args) > 3 {
+			if args[3] == "-" {
+				return nil, fmt.Errorf("invalid workdir: '-' is not a valid directory path")
+			}
+			cfg.WorkDir = args[3]
+		}
+	} else {
+		cfg.Mode = "new"
+		cfg.Task = args[0]
+		cfg.ExplicitStdin = (args[0] == "-")
+		if len(args) > 1 {
+			if args[1] == "-" {
+				return nil, fmt.Errorf("invalid workdir: '-' is not a valid directory path")
+			}
+			cfg.WorkDir = args[1]
+		}
+	}
+
+	return cfg, nil
+}
+
+func lastFlagIndex(argv []string, name string) int {
+	if len(argv) == 0 {
+		return -1
+	}
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return -1
+	}
+
+	needle := "--" + name
+	prefix := needle + "="
+	last := -1
+	for i, arg := range argv {
+		if arg == needle || strings.HasPrefix(arg, prefix) {
+			last = i
+		}
+	}
+	return last
+}
+
+func runParallelMode(cmd *cobra.Command, args []string, opts *cliOptions, v *viper.Viper, name string) int {
+	if len(args) > 0 {
+		fmt.Fprintln(os.Stderr, "ERROR: --parallel reads its task configuration from stdin; no positional arguments are allowed.")
+		fmt.Fprintln(os.Stderr, "Usage examples:")
+		fmt.Fprintf(os.Stderr, "  %s --parallel < tasks.txt\n", name)
+		fmt.Fprintf(os.Stderr, "  echo '...' | %s --parallel\n", name)
+		fmt.Fprintf(os.Stderr, "  %s --parallel <<'EOF'\n", name)
+		fmt.Fprintf(os.Stderr, "  %s --parallel --full-output <<'EOF'  # include full task output\n", name)
+		return 1
+	}
+
+	if cmd.Flags().Changed("agent") || cmd.Flags().Changed("prompt-file") || cmd.Flags().Changed("reasoning-effort") {
+		fmt.Fprintln(os.Stderr, "ERROR: --parallel reads its task configuration from stdin; only --backend, --model, --full-output and --skip-permissions are allowed.")
+		return 1
+	}
+
+	backendName := defaultBackendName
+	if cmd.Flags().Changed("backend") {
+		backendName = strings.TrimSpace(opts.Backend)
+		if backendName == "" {
+			fmt.Fprintln(os.Stderr, "ERROR: --backend flag requires a value")
+			return 1
+		}
+	} else if val := strings.TrimSpace(v.GetString("backend")); val != "" {
+		backendName = val
+	}
+
+	model := ""
+	if cmd.Flags().Changed("model") {
+		model = strings.TrimSpace(opts.Model)
+		if model == "" {
+			fmt.Fprintln(os.Stderr, "ERROR: --model flag requires a value")
+			return 1
+		}
+	} else {
+		model = strings.TrimSpace(v.GetString("model"))
+	}
+
+	fullOutput := opts.FullOutput
+	if !cmd.Flags().Changed("full-output") && v.IsSet("full-output") {
+		fullOutput = v.GetBool("full-output")
+	}
+
+	skipChanged := cmd.Flags().Changed("skip-permissions") || cmd.Flags().Changed("dangerously-skip-permissions")
+	skipPermissions := false
+	if skipChanged {
+		skipPermissions = opts.SkipPermissions
+	} else {
+		skipPermissions = v.GetBool("skip-permissions")
+	}
+
+	backend, err := selectBackendFn(backendName)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
+		return 1
+	}
+	backendName = backend.Name()
+
+	data, err := io.ReadAll(stdinReader)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: failed to read stdin: %v\n", err)
+		return 1
+	}
+
+	cfg, err := parseParallelConfig(data)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
+		return 1
+	}
+
+	cfg.GlobalBackend = backendName
+	model = strings.TrimSpace(model)
+	for i := range cfg.Tasks {
+		if strings.TrimSpace(cfg.Tasks[i].Backend) == "" {
+			cfg.Tasks[i].Backend = backendName
+		}
+		if strings.TrimSpace(cfg.Tasks[i].Model) == "" && model != "" {
+			cfg.Tasks[i].Model = model
+		}
+		cfg.Tasks[i].SkipPermissions = cfg.Tasks[i].SkipPermissions || skipPermissions
+	}
+
+	timeoutSec := resolveTimeout()
+	layers, err := topologicalSort(cfg.Tasks)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
+		return 1
+	}
+
+	results := executeConcurrent(layers, timeoutSec)
+
+	for i := range results {
+		results[i].CoverageTarget = defaultCoverageTarget
+		if results[i].Message == "" {
+			continue
+		}
+
+		lines := strings.Split(results[i].Message, "\n")
+		results[i].Coverage = extractCoverageFromLines(lines)
+		results[i].CoverageNum = extractCoverageNum(results[i].Coverage)
+		results[i].FilesChanged = extractFilesChangedFromLines(lines)
+		results[i].TestsPassed, results[i].TestsFailed = extractTestResultsFromLines(lines)
+		results[i].KeyOutput = extractKeyOutputFromLines(lines, 150)
+	}
+
+	fmt.Println(generateFinalOutputWithMode(results, !fullOutput))
+
+	exitCode := 0
+	for _, res := range results {
+		if res.ExitCode != 0 {
+			exitCode = res.ExitCode
+		}
+	}
+	return exitCode
+}
+
+func runSingleMode(cfg *Config, name string) int {
+	backend, err := selectBackendFn(cfg.Backend)
+	if err != nil {
+		logError(err.Error())
+		return 1
+	}
+	cfg.Backend = backend.Name()
+
+	cmdInjected := codexCommand != defaultCodexCommand
+	argsInjected := buildCodexArgsFn != nil && reflect.ValueOf(buildCodexArgsFn).Pointer() != reflect.ValueOf(defaultBuildArgsFn).Pointer()
+
+	if backend.Name() != defaultBackendName || !cmdInjected {
+		codexCommand = backend.Command()
+	}
+	if backend.Name() != defaultBackendName || !argsInjected {
+		buildCodexArgsFn = backend.BuildArgs
+	}
+	logInfo(fmt.Sprintf("Selected backend: %s", backend.Name()))
+
+	timeoutSec := resolveTimeout()
+	logInfo(fmt.Sprintf("Timeout: %ds", timeoutSec))
+	cfg.Timeout = timeoutSec
+
+	var taskText string
+	var piped bool
+
+	if cfg.ExplicitStdin {
+		logInfo("Explicit stdin mode: reading task from stdin")
+		data, err := io.ReadAll(stdinReader)
+		if err != nil {
+			logError("Failed to read stdin: " + err.Error())
+			return 1
+		}
+		taskText = string(data)
+		if taskText == "" {
+			logError("Explicit stdin mode requires task input from stdin")
+			return 1
+		}
+		piped = !isTerminal()
+	} else {
+		pipedTask, err := readPipedTask()
+		if err != nil {
+			logError("Failed to read piped stdin: " + err.Error())
+			return 1
+		}
+		piped = pipedTask != ""
+		if piped {
+			taskText = pipedTask
+		} else {
+			taskText = cfg.Task
+		}
+	}
+
+	if strings.TrimSpace(cfg.PromptFile) != "" {
+		prompt, err := readAgentPromptFile(cfg.PromptFile, cfg.PromptFileExplicit)
+		if err != nil {
+			logError("Failed to read prompt file: " + err.Error())
+			return 1
+		}
+		taskText = wrapTaskWithAgentPrompt(prompt, taskText)
+	}
+
+	useStdin := cfg.ExplicitStdin || shouldUseStdin(taskText, piped)
+
+	targetArg := taskText
+	if useStdin {
+		targetArg = "-"
+	}
+	codexArgs := buildCodexArgsFn(cfg, targetArg)
+
+	logger := activeLogger()
+	if logger == nil {
+		fmt.Fprintln(os.Stderr, "ERROR: logger is not initialized")
+		return 1
+	}
+
+	fmt.Fprintf(os.Stderr, "[%s]\n", name)
+	fmt.Fprintf(os.Stderr, "  Backend: %s\n", cfg.Backend)
+	fmt.Fprintf(os.Stderr, "  Command: %s %s\n", codexCommand, strings.Join(codexArgs, " "))
+	fmt.Fprintf(os.Stderr, "  PID: %d\n", os.Getpid())
+	fmt.Fprintf(os.Stderr, "  Log: %s\n", logger.Path())
+
+	if useStdin {
+		var reasons []string
+		if piped {
+			reasons = append(reasons, "piped input")
+		}
+		if cfg.ExplicitStdin {
+			reasons = append(reasons, "explicit \"-\"")
+		}
+		if strings.Contains(taskText, "\n") {
+			reasons = append(reasons, "newline")
+		}
+		if strings.Contains(taskText, "\\") {
+			reasons = append(reasons, "backslash")
+		}
+		if strings.Contains(taskText, "\"") {
+			reasons = append(reasons, "double-quote")
+		}
+		if strings.Contains(taskText, "'") {
+			reasons = append(reasons, "single-quote")
+		}
+		if strings.Contains(taskText, "`") {
+			reasons = append(reasons, "backtick")
+		}
+		if strings.Contains(taskText, "$") {
+			reasons = append(reasons, "dollar")
+		}
+		if len(taskText) > 800 {
+			reasons = append(reasons, "length>800")
+		}
+		if len(reasons) > 0 {
+			logWarn(fmt.Sprintf("Using stdin mode for task due to: %s", strings.Join(reasons, ", ")))
+		}
+	}
+
+	logInfo(fmt.Sprintf("%s running...", cfg.Backend))
+
+	taskSpec := TaskSpec{
+		Task:            taskText,
+		WorkDir:         cfg.WorkDir,
+		Mode:            cfg.Mode,
+		SessionID:       cfg.SessionID,
+		Model:           cfg.Model,
+		ReasoningEffort: cfg.ReasoningEffort,
+		Agent:           cfg.Agent,
+		SkipPermissions: cfg.SkipPermissions,
+		UseStdin:        useStdin,
+	}
+
+	result := runTaskFn(taskSpec, false, cfg.Timeout)
+
+	if result.ExitCode != 0 {
+		return result.ExitCode
+	}
+
+	// Validate that we got a meaningful output message
+	if strings.TrimSpace(result.Message) == "" {
+		logError(fmt.Sprintf("no output message: backend=%s returned empty result.Message with exit_code=0", cfg.Backend))
+		return 1
+	}
+
+	fmt.Println(result.Message)
+	if result.SessionID != "" {
+		fmt.Printf("\n---\nSESSION_ID: %s\n", result.SessionID)
+	}
+
+	return 0
+}
--- a/codeagent-wrapper/internal/app/concurrent_stress_test.go
+++ b/codeagent-wrapper/internal/app/concurrent_stress_test.go
@@ -1,4 +1,4 @@
-package main
+package wrapper

 import (
 	"bufio"
@@ -11,9 +11,20 @@ import (
 	"sync/atomic"
 	"testing"
 	"time"
+
+	"github.com/goccy/go-json"
 )

 func stripTimestampPrefix(line string) string {
+	line = strings.TrimSpace(line)
+	if strings.HasPrefix(line, "{") {
+		var evt struct {
+			Message string `json:"message"`
+		}
+		if err := json.Unmarshal([]byte(line), &evt); err == nil && evt.Message != "" {
+			return evt.Message
+		}
+	}
 	if !strings.HasPrefix(line, "[") {
 		return line
 	}
--- a/codeagent-wrapper/internal/app/config_alias.go
+++ b/codeagent-wrapper/internal/app/config_alias.go
@@ -0,0 +1,7 @@
+package wrapper
+
+import config "codeagent-wrapper/internal/config"
+
+// Keep the existing Config name throughout the codebase, but source the
+// implementation from internal/config.
+type Config = config.Config
--- a/codeagent-wrapper/internal/app/executor_alias.go
+++ b/codeagent-wrapper/internal/app/executor_alias.go
@@ -0,0 +1,54 @@
+package wrapper
+
+import (
+	"context"
+
+	backend "codeagent-wrapper/internal/backend"
+	config "codeagent-wrapper/internal/config"
+	executor "codeagent-wrapper/internal/executor"
+)
+
+// defaultRunCodexTaskFn is the default implementation of runCodexTaskFn (exposed for test reset).
+func defaultRunCodexTaskFn(task TaskSpec, timeout int) TaskResult {
+	return executor.DefaultRunCodexTaskFn(task, timeout)
+}
+
+var runCodexTaskFn = defaultRunCodexTaskFn
+
+func topologicalSort(tasks []TaskSpec) ([][]TaskSpec, error) {
+	return executor.TopologicalSort(tasks)
+}
+
+func executeConcurrent(layers [][]TaskSpec, timeout int) []TaskResult {
+	maxWorkers := config.ResolveMaxParallelWorkers()
+	return executeConcurrentWithContext(context.Background(), layers, timeout, maxWorkers)
+}
+
+func executeConcurrentWithContext(parentCtx context.Context, layers [][]TaskSpec, timeout int, maxWorkers int) []TaskResult {
+	return executor.ExecuteConcurrentWithContext(parentCtx, layers, timeout, maxWorkers, runCodexTaskFn)
+}
+
+func generateFinalOutput(results []TaskResult) string {
+	return executor.GenerateFinalOutput(results)
+}
+
+func generateFinalOutputWithMode(results []TaskResult, summaryOnly bool) string {
+	return executor.GenerateFinalOutputWithMode(results, summaryOnly)
+}
+
+func buildCodexArgs(cfg *Config, targetArg string) []string {
+	return backend.BuildCodexArgs(cfg, targetArg)
+}
+
+func runCodexTask(taskSpec TaskSpec, silent bool, timeoutSec int) TaskResult {
+	return runCodexTaskWithContext(context.Background(), taskSpec, nil, nil, false, silent, timeoutSec)
+}
+
+func runCodexProcess(parentCtx context.Context, codexArgs []string, taskText string, useStdin bool, timeoutSec int) (message, threadID string, exitCode int) {
+	res := runCodexTaskWithContext(parentCtx, TaskSpec{Task: taskText, WorkDir: defaultWorkdir, Mode: "new", UseStdin: useStdin}, nil, codexArgs, true, false, timeoutSec)
+	return res.Message, res.SessionID, res.ExitCode
+}
+
+func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backend Backend, customArgs []string, useCustomArgs bool, silent bool, timeoutSec int) TaskResult {
+	return executor.RunCodexTaskWithContext(parentCtx, taskSpec, backend, codexCommand, buildCodexArgsFn, customArgs, useCustomArgs, silent, timeoutSec)
+}
--- a/codeagent-wrapper/internal/app/executor_concurrent_test.go
+++ b/codeagent-wrapper/internal/app/executor_concurrent_test.go
@@ -1,4 +1,4 @@
-package main
+package wrapper

 import (
 	"bufio"
@@ -10,13 +10,15 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"slices"
 	"strings"
 	"sync"
 	"sync/atomic"
-	"syscall"
 	"testing"
 	"time"
+
+	executor "codeagent-wrapper/internal/executor"
 )

 var executorTestTaskCounter atomic.Int64
@@ -32,7 +34,12 @@ type execFakeProcess struct {
 	mu      sync.Mutex
 }

-func (p *execFakeProcess) Pid() int { return p.pid }
+func (p *execFakeProcess) Pid() int {
+	if runtime.GOOS == "windows" {
+		return 0
+	}
+	return p.pid
+}
 func (p *execFakeProcess) Kill() error {
 	p.killed.Add(1)
 	return nil
@@ -84,7 +91,8 @@ func (rc *reasonReadCloser) record(reason string) {

 type execFakeRunner struct {
 	stdout          io.ReadCloser
-	process         processHandle
+	stderr          io.ReadCloser
+	process         executor.ProcessHandle
 	stdin           io.WriteCloser
 	dir             string
 	env             map[string]string
@@ -92,6 +100,7 @@ type execFakeRunner struct {
 	waitDelay       time.Duration
 	startErr        error
 	stdoutErr       error
+	stderrErr       error
 	stdinErr        error
 	allowNilProcess bool
 	started         atomic.Bool
@@ -119,6 +128,15 @@ func (f *execFakeRunner) StdoutPipe() (io.ReadCloser, error) {
 	}
 	return f.stdout, nil
 }
+func (f *execFakeRunner) StderrPipe() (io.ReadCloser, error) {
+	if f.stderrErr != nil {
+		return nil, f.stderrErr
+	}
+	if f.stderr == nil {
+		f.stderr = io.NopCloser(strings.NewReader(""))
+	}
+	return f.stderr, nil
+}
 func (f *execFakeRunner) StdinPipe() (io.WriteCloser, error) {
 	if f.stdinErr != nil {
 		return nil, f.stdinErr
@@ -141,7 +159,7 @@ func (f *execFakeRunner) SetEnv(env map[string]string) {
 		f.env[k] = v
 	}
 }
-func (f *execFakeRunner) Process() processHandle {
+func (f *execFakeRunner) Process() executor.ProcessHandle {
 	if f.process != nil {
 		return f.process
 	}
@@ -151,220 +169,15 @@ func (f *execFakeRunner) Process() processHandle {
 	return &execFakeProcess{pid: 1}
 }

-func TestExecutorHelperCoverage(t *testing.T) {
-	t.Run("realCmdAndProcess", func(t *testing.T) {
-		rc := &realCmd{}
-		if err := rc.Start(); err == nil {
-			t.Fatalf("expected error for nil command")
-		}
-		if err := rc.Wait(); err == nil {
-			t.Fatalf("expected error for nil command")
-		}
-		if _, err := rc.StdoutPipe(); err == nil {
-			t.Fatalf("expected error for nil command")
-		}
-		if _, err := rc.StdinPipe(); err == nil {
-			t.Fatalf("expected error for nil command")
-		}
-		rc.SetStderr(io.Discard)
-		if rc.Process() != nil {
-			t.Fatalf("expected nil process")
-		}
-		rcWithCmd := &realCmd{cmd: &exec.Cmd{}}
-		rcWithCmd.SetStderr(io.Discard)
-		rcWithCmd.SetDir("/tmp")
-		if rcWithCmd.cmd.Dir != "/tmp" {
-			t.Fatalf("expected SetDir to set cmd.Dir, got %q", rcWithCmd.cmd.Dir)
-		}
-		echoCmd := exec.Command("echo", "ok")
-		rcProc := &realCmd{cmd: echoCmd}
-		stdoutPipe, err := rcProc.StdoutPipe()
-		if err != nil {
-			t.Fatalf("StdoutPipe error: %v", err)
-		}
-		stdinPipe, err := rcProc.StdinPipe()
-		if err != nil {
-			t.Fatalf("StdinPipe error: %v", err)
-		}
-		rcProc.SetStderr(io.Discard)
-		if err := rcProc.Start(); err != nil {
-			t.Fatalf("Start failed: %v", err)
-		}
-		_, _ = stdinPipe.Write([]byte{})
-		_ = stdinPipe.Close()
-		procHandle := rcProc.Process()
-		if procHandle == nil {
-			t.Fatalf("expected process handle")
-		}
-		_ = procHandle.Signal(syscall.SIGTERM)
-		_ = procHandle.Kill()
-		_ = rcProc.Wait()
-		_, _ = io.ReadAll(stdoutPipe)
-
-		rp := &realProcess{}
-		if rp.Pid() != 0 {
-			t.Fatalf("nil process should have pid 0")
-		}
-		if rp.Kill() != nil {
-			t.Fatalf("nil process Kill should be nil")
-		}
-		if rp.Signal(syscall.SIGTERM) != nil {
-			t.Fatalf("nil process Signal should be nil")
-		}
-		rpLive := &realProcess{proc: &os.Process{Pid: 99}}
-		if rpLive.Pid() != 99 {
-			t.Fatalf("expected pid 99, got %d", rpLive.Pid())
-		}
-		_ = rpLive.Kill()
-		_ = rpLive.Signal(syscall.SIGTERM)
-	})
-
-	t.Run("topologicalSortAndSkip", func(t *testing.T) {
-		layers, err := topologicalSort([]TaskSpec{{ID: "root"}, {ID: "child", Dependencies: []string{"root"}}})
-		if err != nil || len(layers) != 2 {
-			t.Fatalf("unexpected topological sort result: layers=%d err=%v", len(layers), err)
-		}
-		if _, err := topologicalSort([]TaskSpec{{ID: "cycle", Dependencies: []string{"cycle"}}}); err == nil {
-			t.Fatalf("expected cycle detection error")
-		}
-
-		failed := map[string]TaskResult{"root": {ExitCode: 1}}
-		if skip, _ := shouldSkipTask(TaskSpec{ID: "child", Dependencies: []string{"root"}}, failed); !skip {
-			t.Fatalf("should skip when dependency failed")
-		}
-		if skip, _ := shouldSkipTask(TaskSpec{ID: "leaf"}, failed); skip {
-			t.Fatalf("should not skip task without dependencies")
-		}
-		if skip, _ := shouldSkipTask(TaskSpec{ID: "child-ok", Dependencies: []string{"root"}}, map[string]TaskResult{}); skip {
-			t.Fatalf("should not skip when dependencies succeeded")
-		}
-	})
-
-	t.Run("cancelledTaskResult", func(t *testing.T) {
-		ctx, cancel := context.WithCancel(context.Background())
-		cancel()
-		res := cancelledTaskResult("t1", ctx)
-		if res.ExitCode != 130 {
-			t.Fatalf("expected cancel exit code, got %d", res.ExitCode)
-		}
-
-		timeoutCtx, timeoutCancel := context.WithTimeout(context.Background(), 0)
-		defer timeoutCancel()
-		res = cancelledTaskResult("t2", timeoutCtx)
-		if res.ExitCode != 124 {
-			t.Fatalf("expected timeout exit code, got %d", res.ExitCode)
-		}
-	})
-
-	t.Run("generateFinalOutputAndArgs", func(t *testing.T) {
-		const key = "CODEX_BYPASS_SANDBOX"
-		t.Cleanup(func() { os.Unsetenv(key) })
-		os.Unsetenv(key)
-
-		out := generateFinalOutput([]TaskResult{
-			{TaskID: "ok", ExitCode: 0},
-			{TaskID: "fail", ExitCode: 1, Error: "boom"},
-		})
-		if !strings.Contains(out, "ok") || !strings.Contains(out, "fail") {
-			t.Fatalf("unexpected summary output: %s", out)
-		}
-		// Test summary mode (default) - should have new format with ### headers
-		out = generateFinalOutput([]TaskResult{{TaskID: "rich", ExitCode: 0, SessionID: "sess", LogPath: "/tmp/log", Message: "hello"}})
-		if !strings.Contains(out, "### rich") {
-			t.Fatalf("summary output missing task header: %s", out)
-		}
-		// Test full output mode - should have Session and Message
-		out = generateFinalOutputWithMode([]TaskResult{{TaskID: "rich", ExitCode: 0, SessionID: "sess", LogPath: "/tmp/log", Message: "hello"}}, false)
-		if !strings.Contains(out, "Session: sess") || !strings.Contains(out, "Log: /tmp/log") || !strings.Contains(out, "hello") {
-			t.Fatalf("full output missing fields: %s", out)
-		}
-
-		args := buildCodexArgs(&Config{Mode: "new", WorkDir: "/tmp"}, "task")
-		if !slices.Equal(args, []string{"e", "--skip-git-repo-check", "-C", "/tmp", "--json", "task"}) {
-			t.Fatalf("unexpected codex args: %+v", args)
-		}
-		args = buildCodexArgs(&Config{Mode: "resume", SessionID: "sess"}, "target")
-		if !slices.Equal(args, []string{"e", "--skip-git-repo-check", "--json", "resume", "sess", "target"}) {
-			t.Fatalf("unexpected resume args: %+v", args)
-		}
-	})
-
-	t.Run("generateFinalOutputASCIIMode", func(t *testing.T) {
-		t.Setenv("CODEAGENT_ASCII_MODE", "true")
-
-		results := []TaskResult{
-			{TaskID: "ok", ExitCode: 0, Coverage: "92%", CoverageNum: 92, CoverageTarget: 90, KeyOutput: "done"},
-			{TaskID: "warn", ExitCode: 0, Coverage: "80%", CoverageNum: 80, CoverageTarget: 90, KeyOutput: "did"},
-			{TaskID: "bad", ExitCode: 2, Error: "boom"},
-		}
-		out := generateFinalOutput(results)
-
-		for _, sym := range []string{"PASS", "WARN", "FAIL"} {
-			if !strings.Contains(out, sym) {
-				t.Fatalf("ASCII mode should include %q, got: %s", sym, out)
-			}
-		}
-		for _, sym := range []string{"✓", "⚠️", "✗"} {
-			if strings.Contains(out, sym) {
-				t.Fatalf("ASCII mode should not include %q, got: %s", sym, out)
-			}
-		}
-	})
-
-	t.Run("generateFinalOutputUnicodeMode", func(t *testing.T) {
-		t.Setenv("CODEAGENT_ASCII_MODE", "false")
-
-		results := []TaskResult{
-			{TaskID: "ok", ExitCode: 0, Coverage: "92%", CoverageNum: 92, CoverageTarget: 90, KeyOutput: "done"},
-			{TaskID: "warn", ExitCode: 0, Coverage: "80%", CoverageNum: 80, CoverageTarget: 90, KeyOutput: "did"},
-			{TaskID: "bad", ExitCode: 2, Error: "boom"},
-		}
-		out := generateFinalOutput(results)
-
-		for _, sym := range []string{"✓", "⚠️", "✗"} {
-			if !strings.Contains(out, sym) {
-				t.Fatalf("Unicode mode should include %q, got: %s", sym, out)
-			}
-		}
-	})
-
-	t.Run("executeConcurrentWrapper", func(t *testing.T) {
-		orig := runCodexTaskFn
-		defer func() { runCodexTaskFn = orig }()
-		runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
-			return TaskResult{TaskID: task.ID, ExitCode: 0, Message: "done"}
-		}
-		os.Setenv("CODEAGENT_MAX_PARALLEL_WORKERS", "1")
-		defer os.Unsetenv("CODEAGENT_MAX_PARALLEL_WORKERS")
-
-		results := executeConcurrent([][]TaskSpec{{{ID: "wrap"}}}, 1)
-		if len(results) != 1 || results[0].TaskID != "wrap" {
-			t.Fatalf("unexpected wrapper results: %+v", results)
-		}
-
-		unbounded := executeConcurrentWithContext(context.Background(), [][]TaskSpec{{{ID: "unbounded"}}}, 1, 0)
-		if len(unbounded) != 1 || unbounded[0].ExitCode != 0 {
-			t.Fatalf("unexpected unbounded result: %+v", unbounded)
-		}
-
-		ctx, cancel := context.WithCancel(context.Background())
-		cancel()
-		cancelled := executeConcurrentWithContext(ctx, [][]TaskSpec{{{ID: "cancel"}}}, 1, 1)
-		if cancelled[0].ExitCode == 0 {
-			t.Fatalf("expected cancelled result, got %+v", cancelled[0])
-		}
-	})
-}
-
 func TestExecutorRunCodexTaskWithContext(t *testing.T) {
-	origRunner := newCommandRunner
-	defer func() { newCommandRunner = origRunner }()
+	defer resetTestHooks()

 	t.Run("resumeMissingSessionID", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			t.Fatalf("unexpected command execution for invalid resume config")
 			return nil
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })

 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: ".", Mode: "resume"}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 || !strings.Contains(res.Error, "session_id") {
@@ -374,13 +187,14 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {

 	t.Run("success", func(t *testing.T) {
 		var firstStdout *reasonReadCloser
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			rc := newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"hello"}}`)
 			if firstStdout == nil {
 				firstStdout = rc
 			}
 			return &execFakeRunner{stdout: rc, process: &execFakeProcess{pid: 1234}}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })

 		res := runCodexTaskWithContext(context.Background(), TaskSpec{ID: "task-1", Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.Error != "" || res.Message != "hello" || res.ExitCode != 0 {
@@ -410,17 +224,18 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("startErrors", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{startErr: errors.New("executable file not found"), process: &execFakeProcess{pid: 1}}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.ExitCode != 127 {
 			t.Fatalf("expected missing executable exit code, got %d", res.ExitCode)
 		}

-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{startErr: errors.New("start failed"), process: &execFakeProcess{pid: 2}}
-		}
+		})
 		res = runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected non-zero exit on start failure")
@@ -428,13 +243,14 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("timeoutAndPipes", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:    newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"slow"}}`),
 				process:   &execFakeProcess{pid: 5},
 				waitDelay: 20 * time.Millisecond,
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: ".", UseStdin: true}, nil, nil, false, false, 0)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected timeout result, got %+v", res)
@@ -442,17 +258,18 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("pipeErrors", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{stdoutErr: errors.New("stdout fail"), process: &execFakeProcess{pid: 6}}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected failure on stdout pipe error")
 		}

-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{stdinErr: errors.New("stdin fail"), process: &execFakeProcess{pid: 7}}
-		}
+		})
 		res = runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: ".", UseStdin: true}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected failure on stdin pipe error")
@@ -465,13 +282,14 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 		if exitErr == nil {
 			t.Fatalf("expected exec.ExitError")
 		}
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"ignored"}}`),
 				process: &execFakeProcess{pid: 8},
 				waitErr: exitErr,
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected non-zero exit on wait error")
@@ -479,13 +297,14 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("contextCancelled", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:    newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"cancel"}}`),
 				process:   &execFakeProcess{pid: 9},
 				waitDelay: 10 * time.Millisecond,
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		ctx, cancel := context.WithCancel(context.Background())
 		cancel()
 		res := runCodexTaskWithContext(ctx, TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
@@ -495,12 +314,13 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("silentLogger", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"quiet"}}`),
 				process: &execFakeProcess{pid: 10},
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		_ = closeLogger()
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, true, 1)
 		if res.ExitCode != 0 || res.LogPath == "" {
@@ -510,12 +330,13 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("injectedLogger", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"injected"}}`),
 				process: &execFakeProcess{pid: 12},
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		_ = closeLogger()

 		injected, err := NewLoggerWithSuffix("executor-injected")
@@ -527,7 +348,7 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 			_ = os.Remove(injected.Path())
 		}()

-		ctx := withTaskLogger(context.Background(), injected)
+		ctx := executor.WithTaskLogger(context.Background(), injected)
 		res := runCodexTaskWithContext(ctx, TaskSpec{ID: "task-injected", Task: "payload", WorkDir: "."}, nil, nil, false, true, 1)
 		if res.ExitCode != 0 || res.LogPath != injected.Path() {
 			t.Fatalf("expected injected logger path, got %+v", res)
@@ -547,12 +368,13 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 	})

 	t.Run("contextLoggerWithoutParent", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"ctx"}}`),
 				process: &execFakeProcess{pid: 14},
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		_ = closeLogger()

 		taskLogger, err := NewLoggerWithSuffix("executor-taskctx")
@@ -564,8 +386,8 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 			_ = os.Remove(taskLogger.Path())
 		})

-		ctx := withTaskLogger(context.Background(), taskLogger)
-		res := runCodexTaskWithContext(nil, TaskSpec{ID: "task-context", Task: "payload", WorkDir: ".", Context: ctx}, nil, nil, false, true, 1)
+		ctx := executor.WithTaskLogger(context.Background(), taskLogger)
+		res := runCodexTaskWithContext(context.TODO(), TaskSpec{ID: "task-context", Task: "payload", WorkDir: ".", Context: ctx}, nil, nil, false, true, 1)
 		if res.ExitCode != 0 || res.LogPath != taskLogger.Path() {
 			t.Fatalf("expected task logger to be reused from spec context, got %+v", res)
 		}
@@ -585,16 +407,17 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {

 	t.Run("backendSetsDirAndNilContext", func(t *testing.T) {
 		var rc *execFakeRunner
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			rc = &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"backend"}}`),
 				process: &execFakeProcess{pid: 13},
 			}
 			return rc
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })

 		_ = closeLogger()
-		res := runCodexTaskWithContext(nil, TaskSpec{ID: "task-backend", Task: "payload", WorkDir: "/tmp"}, ClaudeBackend{}, nil, false, false, 1)
+		res := runCodexTaskWithContext(context.TODO(), TaskSpec{ID: "task-backend", Task: "payload", WorkDir: "/tmp"}, ClaudeBackend{}, nil, false, false, 1)
 		if res.ExitCode != 0 || res.Message != "backend" {
 			t.Fatalf("unexpected result: %+v", res)
 		}
@@ -603,13 +426,36 @@ func TestExecutorRunCodexTaskWithContext(t *testing.T) {
 		}
 	})

+	t.Run("claudeSkipPermissionsPropagatesFromTaskSpec", func(t *testing.T) {
+		t.Setenv("CODEAGENT_SKIP_PERMISSIONS", "false")
+		var gotArgs []string
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
+			gotArgs = append([]string(nil), args...)
+			return &execFakeRunner{
+				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"agent_message","text":"ok"}}`),
+				process: &execFakeProcess{pid: 15},
+			}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
+
+		_ = closeLogger()
+		res := runCodexTaskWithContext(context.Background(), TaskSpec{ID: "task-skip", Task: "payload", WorkDir: ".", SkipPermissions: true}, ClaudeBackend{}, nil, false, false, 1)
+		if res.ExitCode != 0 || res.Error != "" {
+			t.Fatalf("unexpected result: %+v", res)
+		}
+		if !slices.Contains(gotArgs, "--dangerously-skip-permissions") {
+			t.Fatalf("expected --dangerously-skip-permissions in args, got %v", gotArgs)
+		}
+	})
+
 	t.Run("missingMessage", func(t *testing.T) {
-		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+		executor.SetNewCommandRunner(func(ctx context.Context, name string, args ...string) executor.CommandRunner {
 			return &execFakeRunner{
 				stdout:  newReasonReadCloser(`{"type":"item.completed","item":{"type":"task","text":"noop"}}`),
 				process: &execFakeProcess{pid: 11},
 			}
-		}
+		})
+		t.Cleanup(func() { executor.SetNewCommandRunner(nil) })
 		res := runCodexTaskWithContext(context.Background(), TaskSpec{Task: "payload", WorkDir: "."}, nil, nil, false, false, 1)
 		if res.ExitCode == 0 {
 			t.Fatalf("expected failure when no agent_message returned")
@@ -635,7 +481,7 @@ func TestExecutorParallelLogIsolation(t *testing.T) {

 	origRun := runCodexTaskFn
 	runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
-		logger := taskLoggerFromContext(task.Context)
+		logger := executor.TaskLoggerFromContext(task.Context)
 		if logger == nil {
 			return TaskResult{TaskID: task.ID, ExitCode: 1, Error: "missing task logger"}
 		}
@@ -659,7 +505,7 @@ func TestExecutorParallelLogIsolation(t *testing.T) {
 	os.Stderr = stderrW
 	defer func() { os.Stderr = oldStderr }()

-	results := executeConcurrentWithContext(nil, [][]TaskSpec{{{ID: taskA}, {ID: taskB}}}, 1, -1)
+	results := executeConcurrentWithContext(context.TODO(), [][]TaskSpec{{{ID: taskA}, {ID: taskB}}}, 1, -1)

 	_ = stderrW.Close()
 	os.Stderr = oldStderr
@@ -725,7 +571,7 @@ func TestConcurrentExecutorParallelLogIsolationAndClosure(t *testing.T) {
 	t.Setenv("TMPDIR", tempDir)

 	oldArgs := os.Args
-	os.Args = []string{defaultWrapperName}
+	os.Args = []string{wrapperName}
 	t.Cleanup(func() { os.Args = oldArgs })

 	mainLogger, err := NewLoggerWithSuffix("concurrent-main")
@@ -771,7 +617,7 @@ func TestConcurrentExecutorParallelLogIsolationAndClosure(t *testing.T) {
 	runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
 		readyCh <- struct{}{}

-		logger := taskLoggerFromContext(task.Context)
+		logger := executor.TaskLoggerFromContext(task.Context)
 		loggerCh <- taskLoggerInfo{taskID: task.ID, logger: logger}
 		if logger == nil {
 			return TaskResult{TaskID: task.ID, ExitCode: 1, Error: "missing task logger"}
@@ -858,15 +704,9 @@ func TestConcurrentExecutorParallelLogIsolationAndClosure(t *testing.T) {
 	}

 	for taskID, logger := range loggers {
-		if !logger.closed.Load() {
+		if !logger.IsClosed() {
 			t.Fatalf("expected task logger to be closed for %q", taskID)
 		}
-		if logger.file == nil {
-			t.Fatalf("expected task logger file to be non-nil for %q", taskID)
-		}
-		if _, err := logger.file.Write([]byte("x")); err == nil {
-			t.Fatalf("expected task logger file to be closed for %q", taskID)
-		}
 	}

 	mainLogger.Flush()
@@ -936,10 +776,10 @@ func parseTaskIDFromLogLine(line string) (string, bool) {
 }

 func TestExecutorTaskLoggerContext(t *testing.T) {
-	if taskLoggerFromContext(nil) != nil {
-		t.Fatalf("expected nil logger from nil context")
+	if executor.TaskLoggerFromContext(context.TODO()) != nil {
+		t.Fatalf("expected nil logger from TODO context")
 	}
-	if taskLoggerFromContext(context.Background()) != nil {
+	if executor.TaskLoggerFromContext(context.Background()) != nil {
 		t.Fatalf("expected nil logger when context has no logger")
 	}

@@ -952,12 +792,12 @@ func TestExecutorTaskLoggerContext(t *testing.T) {
 		_ = os.Remove(logger.Path())
 	}()

-	ctx := withTaskLogger(context.Background(), logger)
-	if got := taskLoggerFromContext(ctx); got != logger {
+	ctx := executor.WithTaskLogger(context.Background(), logger)
+	if got := executor.TaskLoggerFromContext(ctx); got != logger {
 		t.Fatalf("expected logger roundtrip, got %v", got)
 	}

-	if taskLoggerFromContext(withTaskLogger(context.Background(), nil)) != nil {
+	if executor.TaskLoggerFromContext(executor.WithTaskLogger(context.Background(), nil)) != nil {
 		t.Fatalf("expected nil logger when injected logger is nil")
 	}
 }
@@ -1114,7 +954,7 @@ func TestExecutorExecuteConcurrentWithContextBranches(t *testing.T) {

 		orig := runCodexTaskFn
 		runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
-			logger := taskLoggerFromContext(task.Context)
+			logger := executor.TaskLoggerFromContext(task.Context)
 			if logger != mainLogger {
 				return TaskResult{TaskID: task.ID, ExitCode: 1, Error: "unexpected logger"}
 			}
@@ -1148,9 +988,6 @@ func TestExecutorExecuteConcurrentWithContextBranches(t *testing.T) {
 			if res.LogPath != mainLogger.Path() {
 				t.Fatalf("shared log path mismatch: got %q want %q", res.LogPath, mainLogger.Path())
 			}
-			if !res.sharedLog {
-				t.Fatalf("expected sharedLog flag for %+v", res)
-			}
 			if !strings.Contains(stderrOut, "Log (shared)") {
 				t.Fatalf("stderr missing shared marker: %s", stderrOut)
 			}
@@ -1179,7 +1016,7 @@ func TestExecutorExecuteConcurrentWithContextBranches(t *testing.T) {

 		orig := runCodexTaskFn
 		runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
-			logger := taskLoggerFromContext(task.Context)
+			logger := executor.TaskLoggerFromContext(task.Context)
 			if logger == nil {
 				return TaskResult{TaskID: task.ID, ExitCode: 1, Error: "missing logger"}
 			}
@@ -1217,7 +1054,14 @@ func TestExecutorExecuteConcurrentWithContextBranches(t *testing.T) {
 			if err != nil {
 				t.Fatalf("failed to read log %q: %v", res.LogPath, err)
 			}
-			if !strings.Contains(string(data), "TASK="+res.TaskID) {
+			found := false
+			for _, line := range strings.Split(string(data), "\n") {
+				if strings.Contains(stripTimestampPrefix(line), "TASK="+res.TaskID) {
+					found = true
+					break
+				}
+			}
+			if !found {
 				t.Fatalf("log for %q missing task marker, content: %s", res.TaskID, string(data))
 			}
 			_ = os.Remove(res.LogPath)
@@ -1225,147 +1069,6 @@ func TestExecutorExecuteConcurrentWithContextBranches(t *testing.T) {
 	})
 }

-func TestExecutorSignalAndTermination(t *testing.T) {
-	forceKillDelay.Store(0)
-	defer forceKillDelay.Store(5)
-
-	proc := &execFakeProcess{pid: 42}
-	cmd := &execFakeRunner{process: proc}
-
-	origNotify := signalNotifyFn
-	origStop := signalStopFn
-	defer func() {
-		signalNotifyFn = origNotify
-		signalStopFn = origStop
-	}()
-
-	signalNotifyFn = func(c chan<- os.Signal, sigs ...os.Signal) {
-		go func() { c <- syscall.SIGINT }()
-	}
-	signalStopFn = func(c chan<- os.Signal) {}
-
-	forwardSignals(context.Background(), cmd, func(string) {})
-	time.Sleep(20 * time.Millisecond)
-
-	proc.mu.Lock()
-	signalled := len(proc.signals)
-	proc.mu.Unlock()
-	if signalled == 0 {
-		t.Fatalf("process did not receive signal")
-	}
-	if proc.killed.Load() == 0 {
-		t.Fatalf("process was not killed after signal")
-	}
-
-	timer := terminateProcess(cmd)
-	if timer == nil {
-		t.Fatalf("terminateProcess returned nil timer")
-	}
-	timer.Stop()
-
-	ft := terminateCommand(cmd)
-	if ft == nil {
-		t.Fatalf("terminateCommand returned nil")
-	}
-	ft.Stop()
-
-	cmdKill := &execFakeRunner{process: &execFakeProcess{pid: 50}}
-	ftKill := terminateCommand(cmdKill)
-	time.Sleep(10 * time.Millisecond)
-	if p, ok := cmdKill.process.(*execFakeProcess); ok && p.killed.Load() == 0 {
-		t.Fatalf("terminateCommand did not kill process")
-	}
-	ftKill.Stop()
-
-	cmdKill2 := &execFakeRunner{process: &execFakeProcess{pid: 51}}
-	timer2 := terminateProcess(cmdKill2)
-	time.Sleep(10 * time.Millisecond)
-	if p, ok := cmdKill2.process.(*execFakeProcess); ok && p.killed.Load() == 0 {
-		t.Fatalf("terminateProcess did not kill process")
-	}
-	timer2.Stop()
-
-	if terminateCommand(nil) != nil {
-		t.Fatalf("terminateCommand should return nil for nil cmd")
-	}
-	if terminateCommand(&execFakeRunner{allowNilProcess: true}) != nil {
-		t.Fatalf("terminateCommand should return nil when process is nil")
-	}
-	if terminateProcess(nil) != nil {
-		t.Fatalf("terminateProcess should return nil for nil cmd")
-	}
-	if terminateProcess(&execFakeRunner{allowNilProcess: true}) != nil {
-		t.Fatalf("terminateProcess should return nil when process is nil")
-	}
-
-	signalNotifyFn = func(c chan<- os.Signal, sigs ...os.Signal) {}
-	ctxDone, cancelDone := context.WithCancel(context.Background())
-	cancelDone()
-	forwardSignals(ctxDone, &execFakeRunner{process: &execFakeProcess{pid: 70}}, func(string) {})
-}
-
-func TestExecutorCancelReasonAndCloseWithReason(t *testing.T) {
-	if reason := cancelReason("", nil); !strings.Contains(reason, "Context") {
-		t.Fatalf("unexpected cancelReason for nil ctx: %s", reason)
-	}
-	ctx, cancel := context.WithTimeout(context.Background(), 0)
-	defer cancel()
-	if !strings.Contains(cancelReason("cmd", ctx), "timeout") {
-		t.Fatalf("expected timeout reason")
-	}
-	cancelCtx, cancelFn := context.WithCancel(context.Background())
-	cancelFn()
-	if !strings.Contains(cancelReason("cmd", cancelCtx), "Execution cancelled") {
-		t.Fatalf("expected cancellation reason")
-	}
-	if !strings.Contains(cancelReason("", cancelCtx), "codex") {
-		t.Fatalf("expected default command name in cancel reason")
-	}
-
-	rc := &reasonReadCloser{r: strings.NewReader("data"), closedC: make(chan struct{}, 1)}
-	closeWithReason(rc, "why")
-	select {
-	case <-rc.closedC:
-	default:
-		t.Fatalf("CloseWithReason was not called")
-	}
-
-	plain := io.NopCloser(strings.NewReader("x"))
-	closeWithReason(plain, "noop")
-	closeWithReason(nil, "noop")
-}
-
-func TestExecutorForceKillTimerStop(t *testing.T) {
-	done := make(chan struct{}, 1)
-	ft := &forceKillTimer{timer: time.AfterFunc(50*time.Millisecond, func() { done <- struct{}{} }), done: done}
-	ft.Stop()
-
-	done2 := make(chan struct{}, 1)
-	ft2 := &forceKillTimer{timer: time.AfterFunc(0, func() { done2 <- struct{}{} }), done: done2}
-	time.Sleep(10 * time.Millisecond)
-	ft2.Stop()
-
-	var nilTimer *forceKillTimer
-	nilTimer.Stop()
-	(&forceKillTimer{}).Stop()
-}
-
-func TestExecutorForwardSignalsDefaults(t *testing.T) {
-	origNotify := signalNotifyFn
-	origStop := signalStopFn
-	signalNotifyFn = nil
-	signalStopFn = nil
-	defer func() {
-		signalNotifyFn = origNotify
-		signalStopFn = origStop
-	}()
-
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-	forwardSignals(ctx, &execFakeRunner{process: &execFakeProcess{pid: 80}}, func(string) {})
-	time.Sleep(10 * time.Millisecond)
-}
-
 func TestExecutorSharedLogFalseWhenCustomLogPath(t *testing.T) {
 	devNull, err := os.OpenFile(os.DevNull, os.O_WRONLY, 0)
 	if err != nil {
@@ -1421,10 +1124,9 @@ func TestExecutorSharedLogFalseWhenCustomLogPath(t *testing.T) {
 	}

 	res := results[0]
-	// 关键断言：即使 handle.shared=true（因为 task logger 创建失败），
-	// 但因为 LogPath 不等于主 logger 的路径，sharedLog 应为 false
-	if res.sharedLog {
-		t.Fatalf("expected sharedLog=false when LogPath differs from shared logger, got true")
+	out := generateFinalOutputWithMode(results, false)
+	if strings.Contains(out, "(shared)") {
+		t.Fatalf("did not expect shared marker when LogPath differs from shared logger, got: %s", out)
 	}

 	// 验证 LogPath 确实是自定义的
--- a/codeagent-wrapper/internal/app/logger.go
+++ b/codeagent-wrapper/internal/app/logger.go
@@ -0,0 +1,26 @@
+package wrapper
+
+import ilogger "codeagent-wrapper/internal/logger"
+
+type Logger = ilogger.Logger
+type CleanupStats = ilogger.CleanupStats
+
+func NewLogger() (*Logger, error) { return ilogger.NewLogger() }
+
+func NewLoggerWithSuffix(suffix string) (*Logger, error) { return ilogger.NewLoggerWithSuffix(suffix) }
+
+func setLogger(l *Logger) { ilogger.SetLogger(l) }
+
+func closeLogger() error { return ilogger.CloseLogger() }
+
+func activeLogger() *Logger { return ilogger.ActiveLogger() }
+
+func logInfo(msg string) { ilogger.LogInfo(msg) }
+
+func logWarn(msg string) { ilogger.LogWarn(msg) }
+
+func logError(msg string) { ilogger.LogError(msg) }
+
+func cleanupOldLogs() (CleanupStats, error) { return ilogger.CleanupOldLogs() }
+
+func sanitizeLogSuffix(raw string) string { return ilogger.SanitizeLogSuffix(raw) }
--- a/codeagent-wrapper/internal/app/main_integration_test.go
+++ b/codeagent-wrapper/internal/app/main_integration_test.go
@@ -1,7 +1,8 @@
-package main
+package wrapper

 import (
 	"bytes"
+	"codeagent-wrapper/internal/logger"
 	"fmt"
 	"io"
 	"os"
@@ -36,7 +37,9 @@ func captureStdout(t *testing.T, fn func()) string {
 	os.Stdout = old

 	var buf bytes.Buffer
-	io.Copy(&buf, r)
+	if _, err := io.Copy(&buf, r); err != nil {
+		t.Fatalf("io.Copy() error = %v", err)
+	}
 	return buf.String()
 }

@@ -57,11 +60,17 @@ func parseIntegrationOutput(t *testing.T, out string) integrationOutput {
 			for _, p := range parts {
 				p = strings.TrimSpace(p)
 				if strings.HasSuffix(p, "tasks") {
-					fmt.Sscanf(p, "%d tasks", &payload.Summary.Total)
+					if _, err := fmt.Sscanf(p, "%d tasks", &payload.Summary.Total); err != nil {
+						t.Fatalf("failed to parse total tasks from %q: %v", p, err)
+					}
 				} else if strings.HasSuffix(p, "passed") {
-					fmt.Sscanf(p, "%d passed", &payload.Summary.Success)
+					if _, err := fmt.Sscanf(p, "%d passed", &payload.Summary.Success); err != nil {
+						t.Fatalf("failed to parse passed tasks from %q: %v", p, err)
+					}
 				} else if strings.HasSuffix(p, "failed") {
-					fmt.Sscanf(p, "%d failed", &payload.Summary.Failed)
+					if _, err := fmt.Sscanf(p, "%d failed", &payload.Summary.Failed); err != nil {
+						t.Fatalf("failed to parse failed tasks from %q: %v", p, err)
+					}
 				}
 			}
 		} else if strings.HasPrefix(line, "Total:") {
@@ -70,11 +79,17 @@ func parseIntegrationOutput(t *testing.T, out string) integrationOutput {
 			for _, p := range parts {
 				p = strings.TrimSpace(p)
 				if strings.HasPrefix(p, "Total:") {
-					fmt.Sscanf(p, "Total: %d", &payload.Summary.Total)
+					if _, err := fmt.Sscanf(p, "Total: %d", &payload.Summary.Total); err != nil {
+						t.Fatalf("failed to parse total tasks from %q: %v", p, err)
+					}
 				} else if strings.HasPrefix(p, "Success:") {
-					fmt.Sscanf(p, "Success: %d", &payload.Summary.Success)
+					if _, err := fmt.Sscanf(p, "Success: %d", &payload.Summary.Success); err != nil {
+						t.Fatalf("failed to parse passed tasks from %q: %v", p, err)
+					}
 				} else if strings.HasPrefix(p, "Failed:") {
-					fmt.Sscanf(p, "Failed: %d", &payload.Summary.Failed)
+					if _, err := fmt.Sscanf(p, "Failed: %d", &payload.Summary.Failed); err != nil {
+						t.Fatalf("failed to parse failed tasks from %q: %v", p, err)
+					}
 				}
 			}
 		} else if line == "## Task Results" {
@@ -94,34 +109,39 @@ func parseIntegrationOutput(t *testing.T, out string) integrationOutput {
 			currentTask = &TaskResult{}

 			taskLine := strings.TrimPrefix(line, "### ")
-			success, warning, failed := getStatusSymbols()
-			// Parse different formats
-			if strings.Contains(taskLine, " "+success) {
-				parts := strings.Split(taskLine, " "+success)
+			parseMarker := func(marker string, exitCode int) bool {
+				needle := " " + marker
+				if !strings.Contains(taskLine, needle) {
+					return false
+				}
+				parts := strings.Split(taskLine, needle)
 				currentTask.TaskID = strings.TrimSpace(parts[0])
-				currentTask.ExitCode = 0
-				// Extract coverage if present
-				if len(parts) > 1 {
+				currentTask.ExitCode = exitCode
+				if exitCode == 0 && len(parts) > 1 {
 					coveragePart := strings.TrimSpace(parts[1])
 					if strings.HasSuffix(coveragePart, "%") {
 						currentTask.Coverage = coveragePart
 					}
 				}
-			} else if strings.Contains(taskLine, " "+warning) {
-				parts := strings.Split(taskLine, " "+warning)
-				currentTask.TaskID = strings.TrimSpace(parts[0])
-				currentTask.ExitCode = 0
-			} else if strings.Contains(taskLine, " "+failed) {
-				parts := strings.Split(taskLine, " "+failed)
-				currentTask.TaskID = strings.TrimSpace(parts[0])
-				currentTask.ExitCode = 1
-			} else {
+				return true
+			}
+
+			switch {
+			case parseMarker("✓", 0), parseMarker("PASS", 0):
+				// ok
+			case parseMarker("⚠️", 0), parseMarker("WARN", 0):
+				// warning
+			case parseMarker("✗", 1), parseMarker("FAIL", 1):
+				// fail
+			default:
 				currentTask.TaskID = taskLine
 			}
 		} else if currentTask != nil && inTaskResults {
 			// Parse task details
 			if strings.HasPrefix(line, "Exit code:") {
-				fmt.Sscanf(line, "Exit code: %d", &currentTask.ExitCode)
+				if _, err := fmt.Sscanf(line, "Exit code: %d", &currentTask.ExitCode); err != nil {
+					t.Fatalf("failed to parse exit code from %q: %v", line, err)
+				}
 			} else if strings.HasPrefix(line, "Error:") {
 				currentTask.Error = strings.TrimPrefix(line, "Error: ")
 			} else if strings.HasPrefix(line, "Log:") {
@@ -147,7 +167,9 @@ func parseIntegrationOutput(t *testing.T, out string) integrationOutput {
 				currentTask.ExitCode = 0
 			} else if strings.HasPrefix(line, "Status: FAILED") {
 				if strings.Contains(line, "exit code") {
-					fmt.Sscanf(line, "Status: FAILED (exit code %d)", &currentTask.ExitCode)
+					if _, err := fmt.Sscanf(line, "Status: FAILED (exit code %d)", &currentTask.ExitCode); err != nil {
+						t.Fatalf("failed to parse exit code from %q: %v", line, err)
+					}
 				} else {
 					currentTask.ExitCode = 1
 				}
@@ -169,32 +191,6 @@ func parseIntegrationOutput(t *testing.T, out string) integrationOutput {
 	return payload
 }

-func extractTaskBlock(t *testing.T, output, taskID string) string {
-	t.Helper()
-	header := fmt.Sprintf("--- Task: %s ---", taskID)
-	lines := strings.Split(output, "\n")
-	var block []string
-	collecting := false
-	for _, raw := range lines {
-		trimmed := strings.TrimSpace(raw)
-		if !collecting {
-			if trimmed == header {
-				collecting = true
-				block = append(block, trimmed)
-			}
-			continue
-		}
-		if strings.HasPrefix(trimmed, "--- Task: ") && trimmed != header {
-			break
-		}
-		block = append(block, trimmed)
-	}
-	if len(block) == 0 {
-		t.Fatalf("task block %s not found in output:\n%s", taskID, output)
-	}
-	return strings.Join(block, "\n")
-}
-
 func findResultByID(t *testing.T, payload integrationOutput, id string) TaskResult {
 	t.Helper()
 	for _, res := range payload.Results {
@@ -206,6 +202,37 @@ func findResultByID(t *testing.T, payload integrationOutput, id string) TaskResu
 	return TaskResult{}
 }

+func setTempDirEnv(t *testing.T, dir string) string {
+	t.Helper()
+	resolved := dir
+	if eval, err := filepath.EvalSymlinks(dir); err == nil {
+		resolved = eval
+	}
+	t.Setenv("TMPDIR", resolved)
+	t.Setenv("TEMP", resolved)
+	t.Setenv("TMP", resolved)
+	return resolved
+}
+
+func createTempLog(t *testing.T, dir, name string) string {
+	t.Helper()
+	path := filepath.Join(dir, name)
+	if err := os.WriteFile(path, []byte("test"), 0o644); err != nil {
+		t.Fatalf("failed to create temp log %s: %v", path, err)
+	}
+	return path
+}
+
+func stubProcessRunning(t *testing.T, fn func(int) bool) {
+	t.Helper()
+	t.Cleanup(logger.SetProcessRunningCheck(fn))
+}
+
+func stubProcessStartTime(t *testing.T, fn func(int) time.Time) {
+	t.Helper()
+	t.Cleanup(logger.SetProcessStartTimeFn(fn))
+}
+
 func TestRunParallelEndToEnd_OrderAndConcurrency(t *testing.T) {
 	defer resetTestHooks()
 	origRun := runCodexTaskFn
@@ -391,7 +418,7 @@ id: beta
 ---CONTENT---
 task-beta`
 	stdinReader = bytes.NewReader([]byte(input))
-	os.Args = []string{"codex-wrapper", "--parallel"}
+	os.Args = []string{"codeagent-wrapper", "--parallel"}

 	var exitCode int
 	output := captureStdout(t, func() {
@@ -444,9 +471,9 @@ id: d
 ---CONTENT---
 ok-d`
 	stdinReader = bytes.NewReader([]byte(input))
-	os.Args = []string{"codex-wrapper", "--parallel"}
+	os.Args = []string{"codeagent-wrapper", "--parallel"}

-	expectedLog := filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d.log", os.Getpid()))
+	expectedLog := filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", os.Getpid()))

 	origRun := runCodexTaskFn
 	runCodexTaskFn = func(task TaskSpec, timeout int) TaskResult {
@@ -500,9 +527,9 @@ ok-d`

 	// After parallel log isolation fix, each task has its own log file
 	expectedLines := map[string]struct{}{
-		fmt.Sprintf("Task a: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d-a.log", os.Getpid()))): {},
-		fmt.Sprintf("Task b: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d-b.log", os.Getpid()))): {},
-		fmt.Sprintf("Task d: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d-d.log", os.Getpid()))): {},
+		fmt.Sprintf("Task a: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d-a.log", os.Getpid()))): {},
+		fmt.Sprintf("Task b: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d-b.log", os.Getpid()))): {},
+		fmt.Sprintf("Task d: Log: %s", filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d-d.log", os.Getpid()))): {},
 	}

 	if len(taskLines) != len(expectedLines) {
@@ -520,7 +547,7 @@ func TestRunNonParallelOutputsIncludeLogPathsIntegration(t *testing.T) {
 	defer resetTestHooks()

 	tempDir := setTempDirEnv(t, t.TempDir())
-	os.Args = []string{"codex-wrapper", "integration-log-check"}
+	os.Args = []string{"codeagent-wrapper", "integration-log-check"}
 	stdinReader = strings.NewReader("")
 	isTerminalFn = func() bool { return true }
 	codexCommand = "echo"
@@ -538,7 +565,7 @@ func TestRunNonParallelOutputsIncludeLogPathsIntegration(t *testing.T) {
 	if exitCode != 0 {
 		t.Fatalf("run() exit=%d, want 0", exitCode)
 	}
-	expectedLog := filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d.log", os.Getpid()))
+	expectedLog := filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", os.Getpid()))
 	wantLine := fmt.Sprintf("Log: %s", expectedLog)
 	if !strings.Contains(stderr, wantLine) {
 		t.Fatalf("stderr missing %q, got: %q", wantLine, stderr)
@@ -641,7 +668,6 @@ func TestRunParallelTimeoutPropagation(t *testing.T) {
 	t.Cleanup(func() {
 		runCodexTaskFn = origRun
 		resetTestHooks()
-		os.Unsetenv("CODEX_TIMEOUT")
 	})

 	var receivedTimeout int
@@ -650,7 +676,7 @@ func TestRunParallelTimeoutPropagation(t *testing.T) {
 		return TaskResult{TaskID: task.ID, ExitCode: 124, Error: "timeout"}
 	}

-	os.Setenv("CODEX_TIMEOUT", "1")
+	t.Setenv("CODEX_TIMEOUT", "1")
 	input := `---TASK---
 id: T
 ---CONTENT---
@@ -720,11 +746,11 @@ func TestRunStartupCleanupRemovesOrphansEndToEnd(t *testing.T) {

 	tempDir := setTempDirEnv(t, t.TempDir())

-	orphanA := createTempLog(t, tempDir, "codex-wrapper-5001.log")
-	orphanB := createTempLog(t, tempDir, "codex-wrapper-5002-extra.log")
-	orphanC := createTempLog(t, tempDir, "codex-wrapper-5003-suffix.log")
+	orphanA := createTempLog(t, tempDir, "codeagent-wrapper-5001.log")
+	orphanB := createTempLog(t, tempDir, "codeagent-wrapper-5002-extra.log")
+	orphanC := createTempLog(t, tempDir, "codeagent-wrapper-5003-suffix.log")
 	runningPID := 81234
-	runningLog := createTempLog(t, tempDir, fmt.Sprintf("codex-wrapper-%d.log", runningPID))
+	runningLog := createTempLog(t, tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", runningPID))
 	unrelated := createTempLog(t, tempDir, "wrapper.log")

 	stubProcessRunning(t, func(pid int) bool {
@@ -740,7 +766,7 @@ func TestRunStartupCleanupRemovesOrphansEndToEnd(t *testing.T) {
 	codexCommand = createFakeCodexScript(t, "tid-startup", "ok")
 	stdinReader = strings.NewReader("")
 	isTerminalFn = func() bool { return true }
-	os.Args = []string{"codex-wrapper", "task"}
+	os.Args = []string{"codeagent-wrapper", "task"}

 	if exit := run(); exit != 0 {
 		t.Fatalf("run() exit=%d, want 0", exit)
@@ -766,7 +792,7 @@ func TestRunStartupCleanupConcurrentWrappers(t *testing.T) {

 	const totalLogs = 40
 	for i := 0; i < totalLogs; i++ {
-		createTempLog(t, tempDir, fmt.Sprintf("codex-wrapper-%d.log", 9000+i))
+		createTempLog(t, tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", 9000+i))
 	}

 	stubProcessRunning(t, func(pid int) bool {
@@ -790,7 +816,7 @@ func TestRunStartupCleanupConcurrentWrappers(t *testing.T) {
 	close(start)
 	wg.Wait()

-	matches, err := filepath.Glob(filepath.Join(tempDir, "codex-wrapper-*.log"))
+	matches, err := filepath.Glob(filepath.Join(tempDir, "codeagent-wrapper-*.log"))
 	if err != nil {
 		t.Fatalf("glob error: %v", err)
 	}
@@ -804,9 +830,9 @@ func TestRunCleanupFlagEndToEnd_Success(t *testing.T) {

 	tempDir := setTempDirEnv(t, t.TempDir())

-	staleA := createTempLog(t, tempDir, "codex-wrapper-2100.log")
-	staleB := createTempLog(t, tempDir, "codex-wrapper-2200-extra.log")
-	keeper := createTempLog(t, tempDir, "codex-wrapper-2300.log")
+	staleA := createTempLog(t, tempDir, "codeagent-wrapper-2100.log")
+	staleB := createTempLog(t, tempDir, "codeagent-wrapper-2200-extra.log")
+	keeper := createTempLog(t, tempDir, "codeagent-wrapper-2300.log")

 	stubProcessRunning(t, func(pid int) bool {
 		return pid == 2300 || pid == os.Getpid()
@@ -818,7 +844,7 @@ func TestRunCleanupFlagEndToEnd_Success(t *testing.T) {
 		return time.Time{}
 	})

-	os.Args = []string{"codex-wrapper", "--cleanup"}
+	os.Args = []string{"codeagent-wrapper", "--cleanup"}

 	var exitCode int
 	output := captureStdout(t, func() {
@@ -842,10 +868,10 @@ func TestRunCleanupFlagEndToEnd_Success(t *testing.T) {
 	if !strings.Contains(output, "Files kept: 1") {
 		t.Fatalf("missing 'Files kept: 1' in output: %q", output)
 	}
-	if !strings.Contains(output, "codex-wrapper-2100.log") || !strings.Contains(output, "codex-wrapper-2200-extra.log") {
+	if !strings.Contains(output, "codeagent-wrapper-2100.log") || !strings.Contains(output, "codeagent-wrapper-2200-extra.log") {
 		t.Fatalf("missing deleted file names in output: %q", output)
 	}
-	if !strings.Contains(output, "codex-wrapper-2300.log") {
+	if !strings.Contains(output, "codeagent-wrapper-2300.log") {
 		t.Fatalf("missing kept file names in output: %q", output)
 	}

@@ -858,7 +884,7 @@ func TestRunCleanupFlagEndToEnd_Success(t *testing.T) {
 		t.Fatalf("expected kept log to remain, err=%v", err)
 	}

-	currentLog := filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d.log", os.Getpid()))
+	currentLog := filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", os.Getpid()))
 	if _, err := os.Stat(currentLog); err == nil {
 		t.Fatalf("cleanup mode should not create new log file %s", currentLog)
 	} else if !os.IsNotExist(err) {
@@ -877,7 +903,7 @@ func TestRunCleanupFlagEndToEnd_FailureDoesNotAffectStartup(t *testing.T) {
 		return CleanupStats{Scanned: 1}, fmt.Errorf("permission denied")
 	}

-	os.Args = []string{"codex-wrapper", "--cleanup"}
+	os.Args = []string{"codeagent-wrapper", "--cleanup"}

 	var exitCode int
 	errOutput := captureStderr(t, func() {
@@ -894,7 +920,7 @@ func TestRunCleanupFlagEndToEnd_FailureDoesNotAffectStartup(t *testing.T) {
 		t.Fatalf("cleanup called %d times, want 1", calls)
 	}

-	currentLog := filepath.Join(tempDir, fmt.Sprintf("codex-wrapper-%d.log", os.Getpid()))
+	currentLog := filepath.Join(tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", os.Getpid()))
 	if _, err := os.Stat(currentLog); err == nil {
 		t.Fatalf("cleanup failure should not create new log file %s", currentLog)
 	} else if !os.IsNotExist(err) {
@@ -907,7 +933,7 @@ func TestRunCleanupFlagEndToEnd_FailureDoesNotAffectStartup(t *testing.T) {
 	codexCommand = createFakeCodexScript(t, "tid-cleanup-e2e", "ok")
 	stdinReader = strings.NewReader("")
 	isTerminalFn = func() bool { return true }
-	os.Args = []string{"codex-wrapper", "post-cleanup task"}
+	os.Args = []string{"codeagent-wrapper", "post-cleanup task"}

 	var normalExit int
 	normalOutput := captureStdout(t, func() {
--- a/codeagent-wrapper/internal/app/main_test.go
+++ b/codeagent-wrapper/internal/app/main_test.go
--- a/codeagent-wrapper/internal/app/parallel_config.go
+++ b/codeagent-wrapper/internal/app/parallel_config.go
@@ -0,0 +1,9 @@
+package wrapper
+
+import (
+	executor "codeagent-wrapper/internal/executor"
+)
+
+func parseParallelConfig(data []byte) (*ParallelConfig, error) {
+	return executor.ParseParallelConfig(data)
+}
--- a/codeagent-wrapper/internal/app/parser.go
+++ b/codeagent-wrapper/internal/app/parser.go
@@ -0,0 +1,34 @@
+package wrapper
+
+import (
+	"bufio"
+	"io"
+
+	parser "codeagent-wrapper/internal/parser"
+
+	"github.com/goccy/go-json"
+)
+
+func parseJSONStream(r io.Reader) (message, threadID string) {
+	return parseJSONStreamWithLog(r, logWarn, logInfo)
+}
+
+func parseJSONStreamWithWarn(r io.Reader, warnFn func(string)) (message, threadID string) {
+	return parseJSONStreamWithLog(r, warnFn, logInfo)
+}
+
+func parseJSONStreamWithLog(r io.Reader, warnFn func(string), infoFn func(string)) (message, threadID string) {
+	return parseJSONStreamInternal(r, warnFn, infoFn, nil, nil)
+}
+
+func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(string), onMessage func(), onComplete func()) (message, threadID string) {
+	return parser.ParseJSONStreamInternal(r, warnFn, infoFn, onMessage, onComplete)
+}
+
+func hasKey(m map[string]json.RawMessage, key string) bool { return parser.HasKey(m, key) }
+
+func discardInvalidJSON(decoder *json.Decoder, reader *bufio.Reader) (*bufio.Reader, error) {
+	return parser.DiscardInvalidJSON(decoder, reader)
+}
+
+func normalizeText(text interface{}) string { return parser.NormalizeText(text) }
--- a/codeagent-wrapper/internal/app/task_types.go
+++ b/codeagent-wrapper/internal/app/task_types.go
@@ -0,0 +1,8 @@
+package wrapper
+
+import executor "codeagent-wrapper/internal/executor"
+
+// Type aliases to keep existing names in the wrapper package.
+type ParallelConfig = executor.ParallelConfig
+type TaskSpec = executor.TaskSpec
+type TaskResult = executor.TaskResult
--- a/codeagent-wrapper/internal/app/terminal_test.go
+++ b/codeagent-wrapper/internal/app/terminal_test.go
@@ -0,0 +1,30 @@
+package wrapper
+
+import (
+	"os"
+	"testing"
+)
+
+func TestDefaultIsTerminalCoverage(t *testing.T) {
+	oldStdin := os.Stdin
+	t.Cleanup(func() { os.Stdin = oldStdin })
+
+	f, err := os.CreateTemp(t.TempDir(), "stdin-*")
+	if err != nil {
+		t.Fatalf("os.CreateTemp() error = %v", err)
+	}
+	defer os.Remove(f.Name())
+
+	os.Stdin = f
+	if got := defaultIsTerminal(); got {
+		t.Fatalf("defaultIsTerminal() = %v, want false for regular file", got)
+	}
+
+	if err := f.Close(); err != nil {
+		t.Fatalf("Close() error = %v", err)
+	}
+	os.Stdin = f
+	if got := defaultIsTerminal(); !got {
+		t.Fatalf("defaultIsTerminal() = %v, want true when Stat fails", got)
+	}
+}
--- a/codeagent-wrapper/internal/app/utils.go
+++ b/codeagent-wrapper/internal/app/utils.go
@@ -1,4 +1,4 @@
-package main
+package wrapper

 import (
 	"bytes"
@@ -7,6 +7,8 @@ import (
 	"os"
 	"strconv"
 	"strings"
+
+	utils "codeagent-wrapper/internal/utils"
 )

 func resolveTimeout() int {
@@ -52,7 +54,7 @@ func shouldUseStdin(taskText string, piped bool) bool {
 	if len(taskText) > 800 {
 		return true
 	}
-	return strings.IndexAny(taskText, stdinSpecialChars) >= 0
+	return strings.ContainsAny(taskText, stdinSpecialChars)
 }

 func defaultIsTerminal() bool {
@@ -196,69 +198,21 @@ func (b *tailBuffer) String() string {
 }

 func truncate(s string, maxLen int) string {
-	if len(s) <= maxLen {
-		return s
-	}
-	if maxLen < 0 {
-		return ""
-	}
-	return s[:maxLen] + "..."
+	return utils.Truncate(s, maxLen)
 }

 // safeTruncate safely truncates string to maxLen, avoiding panic and UTF-8 corruption.
 func safeTruncate(s string, maxLen int) string {
-	if maxLen <= 0 || s == "" {
-		return ""
-	}
-
-	runes := []rune(s)
-	if len(runes) <= maxLen {
-		return s
-	}
-
-	if maxLen < 4 {
-		return string(runes[:1])
-	}
-
-	cutoff := maxLen - 3
-	if cutoff <= 0 {
-		return string(runes[:1])
-	}
-	if len(runes) <= cutoff {
-		return s
-	}
-	return string(runes[:cutoff]) + "..."
+	return utils.SafeTruncate(s, maxLen)
 }

 // sanitizeOutput removes ANSI escape sequences and control characters.
 func sanitizeOutput(s string) string {
-	var result strings.Builder
-	inEscape := false
-	for i := 0; i < len(s); i++ {
-		if s[i] == '\x1b' && i+1 < len(s) && s[i+1] == '[' {
-			inEscape = true
-			i++ // skip '['
-			continue
-		}
-		if inEscape {
-			if (s[i] >= 'A' && s[i] <= 'Z') || (s[i] >= 'a' && s[i] <= 'z') {
-				inEscape = false
-			}
-			continue
-		}
-		// Keep printable chars and common whitespace.
-		if s[i] >= 32 || s[i] == '\n' || s[i] == '\t' {
-			result.WriteByte(s[i])
-		}
-	}
-	return result.String()
+	return utils.SanitizeOutput(s)
 }

 func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
+	return utils.Min(a, b)
 }

 func hello() string {
@@ -273,30 +227,6 @@ func farewell(name string) string {
 	return "goodbye " + name
 }

-// extractMessageSummary extracts a brief summary from task output
-// Returns first meaningful line or truncated content up to maxLen chars
-func extractMessageSummary(message string, maxLen int) string {
-	if message == "" || maxLen <= 0 {
-		return ""
-	}
-
-	// Try to find a meaningful summary line
-	lines := strings.Split(message, "\n")
-	for _, line := range lines {
-		line = strings.TrimSpace(line)
-		// Skip empty lines and common noise
-		if line == "" || strings.HasPrefix(line, "```") || strings.HasPrefix(line, "---") {
-			continue
-		}
-		// Found a meaningful line
-		return safeTruncate(line, maxLen)
-	}
-
-	// Fallback: truncate entire message
-	clean := strings.TrimSpace(message)
-	return safeTruncate(clean, maxLen)
-}
-
 // extractCoverageFromLines extracts coverage from pre-split lines.
 func extractCoverageFromLines(lines []string) string {
 	if len(lines) == 0 {
@@ -405,7 +335,7 @@ func extractFilesChangedFromLines(lines []string) []string {
 		for _, prefix := range []string{"Modified:", "Created:", "Updated:", "Edited:", "Wrote:", "Changed:"} {
 			if strings.HasPrefix(line, prefix) {
 				file := strings.TrimSpace(strings.TrimPrefix(line, prefix))
-				file = strings.Trim(file, "`,\"'()[],:")
+				file = strings.Trim(file, "`\"'()[],:")
 				file = strings.TrimPrefix(file, "@")
 				if file != "" && !seen[file] {
 					files = append(files, file)
@@ -422,7 +352,7 @@ func extractFilesChangedFromLines(lines []string) []string {
 		// Pattern 2: Tokens that look like file paths (allow root files, strip @ prefix).
 		parts := strings.Fields(line)
 		for _, part := range parts {
-			part = strings.Trim(part, "`,\"'()[],:")
+			part = strings.Trim(part, "`\"'()[],:")
 			part = strings.TrimPrefix(part, "@")
 			for _, ext := range exts {
 				if strings.HasSuffix(part, ext) && !seen[part] {
@@ -591,125 +521,3 @@ func extractKeyOutputFromLines(lines []string, maxLen int) string {
 	clean := strings.TrimSpace(strings.Join(lines, "\n"))
 	return safeTruncate(clean, maxLen)
 }
-
-// extractKeyOutput extracts a brief summary of what the task accomplished
-// Looks for summary lines, first meaningful sentence, or truncates message
-func extractKeyOutput(message string, maxLen int) string {
-	if message == "" || maxLen <= 0 {
-		return ""
-	}
-	return extractKeyOutputFromLines(strings.Split(message, "\n"), maxLen)
-}
-
-// extractCoverageGap extracts what's missing from coverage reports
-// Looks for uncovered lines, branches, or functions
-func extractCoverageGap(message string) string {
-	if message == "" {
-		return ""
-	}
-
-	lower := strings.ToLower(message)
-	lines := strings.Split(message, "\n")
-
-	// Look for uncovered/missing patterns
-	for _, line := range lines {
-		lineLower := strings.ToLower(line)
-		line = strings.TrimSpace(line)
-
-		// Common patterns for uncovered code
-		if strings.Contains(lineLower, "uncovered") ||
-			strings.Contains(lineLower, "not covered") ||
-			strings.Contains(lineLower, "missing coverage") ||
-			strings.Contains(lineLower, "lines not covered") {
-			if len(line) > 100 {
-				return line[:97] + "..."
-			}
-			return line
-		}
-
-		// Look for specific file:line patterns in coverage reports
-		if strings.Contains(lineLower, "branch") && strings.Contains(lineLower, "not taken") {
-			if len(line) > 100 {
-				return line[:97] + "..."
-			}
-			return line
-		}
-	}
-
-	// Look for function names that aren't covered
-	if strings.Contains(lower, "function") && strings.Contains(lower, "0%") {
-		for _, line := range lines {
-			if strings.Contains(strings.ToLower(line), "0%") && strings.Contains(line, "function") {
-				line = strings.TrimSpace(line)
-				if len(line) > 100 {
-					return line[:97] + "..."
-				}
-				return line
-			}
-		}
-	}
-
-	return ""
-}
-
-// extractErrorDetail extracts meaningful error context from task output
-// Returns the most relevant error information up to maxLen characters
-func extractErrorDetail(message string, maxLen int) string {
-	if message == "" || maxLen <= 0 {
-		return ""
-	}
-
-	lines := strings.Split(message, "\n")
-	var errorLines []string
-
-	// Look for error-related lines
-	for _, line := range lines {
-		line = strings.TrimSpace(line)
-		if line == "" {
-			continue
-		}
-
-		lower := strings.ToLower(line)
-
-		// Skip noise lines
-		if strings.HasPrefix(line, "at ") && strings.Contains(line, "(") {
-			// Stack trace line - only keep first one
-			if len(errorLines) > 0 && strings.HasPrefix(strings.ToLower(errorLines[len(errorLines)-1]), "at ") {
-				continue
-			}
-		}
-
-		// Prioritize error/fail lines
-		if strings.Contains(lower, "error") ||
-			strings.Contains(lower, "fail") ||
-			strings.Contains(lower, "exception") ||
-			strings.Contains(lower, "assert") ||
-			strings.Contains(lower, "expected") ||
-			strings.Contains(lower, "timeout") ||
-			strings.Contains(lower, "not found") ||
-			strings.Contains(lower, "cannot") ||
-			strings.Contains(lower, "undefined") ||
-			strings.HasPrefix(line, "FAIL") ||
-			strings.HasPrefix(line, "●") {
-			errorLines = append(errorLines, line)
-		}
-	}
-
-	if len(errorLines) == 0 {
-		// No specific error lines found, take last few lines
-		start := len(lines) - 5
-		if start < 0 {
-			start = 0
-		}
-		for _, line := range lines[start:] {
-			line = strings.TrimSpace(line)
-			if line != "" {
-				errorLines = append(errorLines, line)
-			}
-		}
-	}
-
-	// Join and truncate
-	result := strings.Join(errorLines, " | ")
-	return safeTruncate(result, maxLen)
-}
--- a/codeagent-wrapper/internal/app/utils_test.go
+++ b/codeagent-wrapper/internal/app/utils_test.go
@@ -1,4 +1,4 @@
-package main
+package wrapper

 import (
 	"fmt"
--- a/codeagent-wrapper/internal/app/wrapper_name.go
+++ b/codeagent-wrapper/internal/app/wrapper_name.go
@@ -0,0 +1,9 @@
+package wrapper
+
+import ilogger "codeagent-wrapper/internal/logger"
+
+const wrapperName = ilogger.WrapperName
+
+func currentWrapperName() string { return ilogger.CurrentWrapperName() }
+
+func primaryLogPrefix() string { return ilogger.PrimaryLogPrefix() }
--- a/codeagent-wrapper/internal/backend/backend.go
+++ b/codeagent-wrapper/internal/backend/backend.go
@@ -0,0 +1,33 @@
+package backend
+
+import config "codeagent-wrapper/internal/config"
+
+// Backend defines the contract for invoking different AI CLI backends.
+// Each backend is responsible for supplying the executable command and
+// building the argument list based on the wrapper config.
+type Backend interface {
+	Name() string
+	BuildArgs(cfg *config.Config, targetArg string) []string
+	Command() string
+	Env(baseURL, apiKey string) map[string]string
+}
+
+var (
+	logWarnFn  = func(string) {}
+	logErrorFn = func(string) {}
+)
+
+// SetLogFuncs configures optional logging hooks used by some backends.
+// Callers can safely pass nil to disable the hook.
+func SetLogFuncs(warnFn, errorFn func(string)) {
+	if warnFn != nil {
+		logWarnFn = warnFn
+	} else {
+		logWarnFn = func(string) {}
+	}
+	if errorFn != nil {
+		logErrorFn = errorFn
+	} else {
+		logErrorFn = func(string) {}
+	}
+}
--- a/codeagent-wrapper/internal/backend/backend_test.go
+++ b/codeagent-wrapper/internal/backend/backend_test.go
@@ -1,4 +1,4 @@
-package main
+package backend

 import (
 	"bytes"
@@ -6,13 +6,16 @@ import (
 	"path/filepath"
 	"reflect"
 	"testing"
+
+	config "codeagent-wrapper/internal/config"
 )

 func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 	backend := ClaudeBackend{}

-	t.Run("new mode omits skip-permissions by default", func(t *testing.T) {
-		cfg := &Config{Mode: "new", WorkDir: "/repo"}
+	t.Run("new mode omits skip-permissions when env disabled", func(t *testing.T) {
+		t.Setenv("CODEAGENT_SKIP_PERMISSIONS", "false")
+		cfg := &config.Config{Mode: "new", WorkDir: "/repo"}
 		got := backend.BuildArgs(cfg, "todo")
 		want := []string{"-p", "--setting-sources", "", "--output-format", "stream-json", "--verbose", "todo"}
 		if !reflect.DeepEqual(got, want) {
@@ -20,8 +23,8 @@ func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 		}
 	})

-	t.Run("new mode can opt-in skip-permissions", func(t *testing.T) {
-		cfg := &Config{Mode: "new", SkipPermissions: true}
+	t.Run("new mode includes skip-permissions by default", func(t *testing.T) {
+		cfg := &config.Config{Mode: "new", SkipPermissions: false}
 		got := backend.BuildArgs(cfg, "-")
 		want := []string{"-p", "--dangerously-skip-permissions", "--setting-sources", "", "--output-format", "stream-json", "--verbose", "-"}
 		if !reflect.DeepEqual(got, want) {
@@ -30,7 +33,8 @@ func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 	})

 	t.Run("resume mode includes session id", func(t *testing.T) {
-		cfg := &Config{Mode: "resume", SessionID: "sid-123", WorkDir: "/ignored"}
+		t.Setenv("CODEAGENT_SKIP_PERMISSIONS", "false")
+		cfg := &config.Config{Mode: "resume", SessionID: "sid-123", WorkDir: "/ignored"}
 		got := backend.BuildArgs(cfg, "resume-task")
 		want := []string{"-p", "--setting-sources", "", "-r", "sid-123", "--output-format", "stream-json", "--verbose", "resume-task"}
 		if !reflect.DeepEqual(got, want) {
@@ -39,7 +43,8 @@ func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 	})

 	t.Run("resume mode without session still returns base flags", func(t *testing.T) {
-		cfg := &Config{Mode: "resume", WorkDir: "/ignored"}
+		t.Setenv("CODEAGENT_SKIP_PERMISSIONS", "false")
+		cfg := &config.Config{Mode: "resume", WorkDir: "/ignored"}
 		got := backend.BuildArgs(cfg, "follow-up")
 		want := []string{"-p", "--setting-sources", "", "--output-format", "stream-json", "--verbose", "follow-up"}
 		if !reflect.DeepEqual(got, want) {
@@ -48,7 +53,7 @@ func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 	})

 	t.Run("resume mode can opt-in skip permissions", func(t *testing.T) {
-		cfg := &Config{Mode: "resume", SessionID: "sid-123", SkipPermissions: true}
+		cfg := &config.Config{Mode: "resume", SessionID: "sid-123", SkipPermissions: true}
 		got := backend.BuildArgs(cfg, "resume-task")
 		want := []string{"-p", "--dangerously-skip-permissions", "--setting-sources", "", "-r", "sid-123", "--output-format", "stream-json", "--verbose", "resume-task"}
 		if !reflect.DeepEqual(got, want) {
@@ -63,12 +68,48 @@ func TestClaudeBuildArgs_ModesAndPermissions(t *testing.T) {
 	})
 }

+func TestBackendBuildArgs_Model(t *testing.T) {
+	t.Run("claude includes --model when set", func(t *testing.T) {
+		t.Setenv("CODEAGENT_SKIP_PERMISSIONS", "false")
+		backend := ClaudeBackend{}
+		cfg := &config.Config{Mode: "new", Model: "opus"}
+		got := backend.BuildArgs(cfg, "todo")
+		want := []string{"-p", "--setting-sources", "", "--model", "opus", "--output-format", "stream-json", "--verbose", "todo"}
+		if !reflect.DeepEqual(got, want) {
+			t.Fatalf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("gemini includes -m when set", func(t *testing.T) {
+		backend := GeminiBackend{}
+		cfg := &config.Config{Mode: "new", Model: "gemini-3-pro-preview"}
+		got := backend.BuildArgs(cfg, "task")
+		want := []string{"-o", "stream-json", "-y", "-m", "gemini-3-pro-preview", "task"}
+		if !reflect.DeepEqual(got, want) {
+			t.Fatalf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("codex includes --model when set", func(t *testing.T) {
+		const key = "CODEX_BYPASS_SANDBOX"
+		t.Setenv(key, "false")
+
+		backend := CodexBackend{}
+		cfg := &config.Config{Mode: "new", WorkDir: "/tmp", Model: "o3"}
+		got := backend.BuildArgs(cfg, "task")
+		want := []string{"e", "--model", "o3", "--skip-git-repo-check", "-C", "/tmp", "--json", "task"}
+		if !reflect.DeepEqual(got, want) {
+			t.Fatalf("got %v, want %v", got, want)
+		}
+	})
+}
+
 func TestClaudeBuildArgs_GeminiAndCodexModes(t *testing.T) {
 	t.Run("gemini new mode defaults workdir", func(t *testing.T) {
 		backend := GeminiBackend{}
-		cfg := &Config{Mode: "new", WorkDir: "/workspace"}
+		cfg := &config.Config{Mode: "new", WorkDir: "/workspace"}
 		got := backend.BuildArgs(cfg, "task")
-		want := []string{"-o", "stream-json", "-y", "-p", "task"}
+		want := []string{"-o", "stream-json", "-y", "task"}
 		if !reflect.DeepEqual(got, want) {
 			t.Fatalf("got %v, want %v", got, want)
 		}
@@ -76,9 +117,9 @@ func TestClaudeBuildArgs_GeminiAndCodexModes(t *testing.T) {

 	t.Run("gemini resume mode uses session id", func(t *testing.T) {
 		backend := GeminiBackend{}
-		cfg := &Config{Mode: "resume", SessionID: "sid-999"}
+		cfg := &config.Config{Mode: "resume", SessionID: "sid-999"}
 		got := backend.BuildArgs(cfg, "resume")
-		want := []string{"-o", "stream-json", "-y", "-r", "sid-999", "-p", "resume"}
+		want := []string{"-o", "stream-json", "-y", "-r", "sid-999", "resume"}
 		if !reflect.DeepEqual(got, want) {
 			t.Fatalf("got %v, want %v", got, want)
 		}
@@ -86,9 +127,9 @@ func TestClaudeBuildArgs_GeminiAndCodexModes(t *testing.T) {

 	t.Run("gemini resume mode without session omits identifier", func(t *testing.T) {
 		backend := GeminiBackend{}
-		cfg := &Config{Mode: "resume"}
+		cfg := &config.Config{Mode: "resume"}
 		got := backend.BuildArgs(cfg, "resume")
-		want := []string{"-o", "stream-json", "-y", "-p", "resume"}
+		want := []string{"-o", "stream-json", "-y", "resume"}
 		if !reflect.DeepEqual(got, want) {
 			t.Fatalf("got %v, want %v", got, want)
 		}
@@ -101,13 +142,22 @@ func TestClaudeBuildArgs_GeminiAndCodexModes(t *testing.T) {
 		}
 	})

+	t.Run("gemini stdin mode uses -p flag", func(t *testing.T) {
+		backend := GeminiBackend{}
+		cfg := &config.Config{Mode: "new"}
+		got := backend.BuildArgs(cfg, "-")
+		want := []string{"-o", "stream-json", "-y", "-p", "-"}
+		if !reflect.DeepEqual(got, want) {
+			t.Fatalf("got %v, want %v", got, want)
+		}
+	})
+
 	t.Run("codex build args omits bypass flag by default", func(t *testing.T) {
 		const key = "CODEX_BYPASS_SANDBOX"
-		t.Cleanup(func() { os.Unsetenv(key) })
-		os.Unsetenv(key)
+		t.Setenv(key, "false")

 		backend := CodexBackend{}
-		cfg := &Config{Mode: "new", WorkDir: "/tmp"}
+		cfg := &config.Config{Mode: "new", WorkDir: "/tmp"}
 		got := backend.BuildArgs(cfg, "task")
 		want := []string{"e", "--skip-git-repo-check", "-C", "/tmp", "--json", "task"}
 		if !reflect.DeepEqual(got, want) {
@@ -117,11 +167,10 @@ func TestClaudeBuildArgs_GeminiAndCodexModes(t *testing.T) {

 	t.Run("codex build args includes bypass flag when enabled", func(t *testing.T) {
 		const key = "CODEX_BYPASS_SANDBOX"
-		t.Cleanup(func() { os.Unsetenv(key) })
-		os.Setenv(key, "true")
+		t.Setenv(key, "true")

 		backend := CodexBackend{}
-		cfg := &Config{Mode: "new", WorkDir: "/tmp"}
+		cfg := &config.Config{Mode: "new", WorkDir: "/tmp"}
 		got := backend.BuildArgs(cfg, "task")
 		want := []string{"e", "--dangerously-bypass-approvals-and-sandbox", "--skip-git-repo-check", "-C", "/tmp", "--json", "task"}
 		if !reflect.DeepEqual(got, want) {
@@ -157,7 +206,7 @@ func TestLoadMinimalEnvSettings(t *testing.T) {
 	t.Setenv("USERPROFILE", home)

 	t.Run("missing file returns empty", func(t *testing.T) {
-		if got := loadMinimalEnvSettings(); len(got) != 0 {
+		if got := LoadMinimalEnvSettings(); len(got) != 0 {
 			t.Fatalf("got %v, want empty", got)
 		}
 	})
@@ -173,7 +222,7 @@ func TestLoadMinimalEnvSettings(t *testing.T) {
 			t.Fatalf("WriteFile: %v", err)
 		}

-		got := loadMinimalEnvSettings()
+		got := LoadMinimalEnvSettings()
 		if got["ANTHROPIC_API_KEY"] != "secret" || got["FOO"] != "bar" {
 			t.Fatalf("got %v, want keys present", got)
 		}
@@ -187,7 +236,7 @@ func TestLoadMinimalEnvSettings(t *testing.T) {
 			t.Fatalf("WriteFile: %v", err)
 		}

-		got := loadMinimalEnvSettings()
+		got := LoadMinimalEnvSettings()
 		if got["GOOD"] != "ok" {
 			t.Fatalf("got %v, want GOOD=ok", got)
 		}
@@ -202,12 +251,72 @@ func TestLoadMinimalEnvSettings(t *testing.T) {
 	t.Run("oversized file returns empty", func(t *testing.T) {
 		dir := filepath.Join(home, ".claude")
 		path := filepath.Join(dir, "settings.json")
-		data := bytes.Repeat([]byte("a"), maxClaudeSettingsBytes+1)
+		data := bytes.Repeat([]byte("a"), MaxClaudeSettingsBytes+1)
 		if err := os.WriteFile(path, data, 0o600); err != nil {
 			t.Fatalf("WriteFile: %v", err)
 		}
-		if got := loadMinimalEnvSettings(); len(got) != 0 {
+		if got := LoadMinimalEnvSettings(); len(got) != 0 {
 			t.Fatalf("got %v, want empty", got)
 		}
 	})
 }
+
+func TestOpencodeBackend_BuildArgs(t *testing.T) {
+	backend := OpencodeBackend{}
+
+	t.Run("basic", func(t *testing.T) {
+		cfg := &config.Config{Mode: "new"}
+		got := backend.BuildArgs(cfg, "hello")
+		want := []string{"run", "--format", "json", "hello"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("with model", func(t *testing.T) {
+		cfg := &config.Config{Mode: "new", Model: "opencode/grok-code"}
+		got := backend.BuildArgs(cfg, "task")
+		want := []string{"run", "-m", "opencode/grok-code", "--format", "json", "task"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("resume mode", func(t *testing.T) {
+		cfg := &config.Config{Mode: "resume", SessionID: "ses_123", Model: "opencode/grok-code"}
+		got := backend.BuildArgs(cfg, "follow-up")
+		want := []string{"run", "-m", "opencode/grok-code", "-s", "ses_123", "--format", "json", "follow-up"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("resume without session", func(t *testing.T) {
+		cfg := &config.Config{Mode: "resume"}
+		got := backend.BuildArgs(cfg, "task")
+		want := []string{"run", "--format", "json", "task"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+
+	t.Run("stdin mode omits dash", func(t *testing.T) {
+		cfg := &config.Config{Mode: "new"}
+		got := backend.BuildArgs(cfg, "-")
+		want := []string{"run", "--format", "json"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	})
+}
+
+func TestOpencodeBackend_Interface(t *testing.T) {
+	backend := OpencodeBackend{}
+
+	if backend.Name() != "opencode" {
+		t.Errorf("Name() = %q, want %q", backend.Name(), "opencode")
+	}
+	if backend.Command() != "opencode" {
+		t.Errorf("Command() = %q, want %q", backend.Command(), "opencode")
+	}
+}
--- a/codeagent-wrapper/internal/backend/claude.go
+++ b/codeagent-wrapper/internal/backend/claude.go
@@ -0,0 +1,139 @@
+package backend
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+
+	"github.com/goccy/go-json"
+)
+
+type ClaudeBackend struct{}
+
+func (ClaudeBackend) Name() string    { return "claude" }
+func (ClaudeBackend) Command() string { return "claude" }
+func (ClaudeBackend) Env(baseURL, apiKey string) map[string]string {
+	baseURL = strings.TrimSpace(baseURL)
+	apiKey = strings.TrimSpace(apiKey)
+	if baseURL == "" && apiKey == "" {
+		return nil
+	}
+	env := make(map[string]string, 2)
+	if baseURL != "" {
+		env["ANTHROPIC_BASE_URL"] = baseURL
+	}
+	if apiKey != "" {
+		env["ANTHROPIC_API_KEY"] = apiKey
+	}
+	return env
+}
+func (ClaudeBackend) BuildArgs(cfg *config.Config, targetArg string) []string {
+	return buildClaudeArgs(cfg, targetArg)
+}
+
+const MaxClaudeSettingsBytes = 1 << 20 // 1MB
+
+type MinimalClaudeSettings struct {
+	Env   map[string]string
+	Model string
+}
+
+// LoadMinimalClaudeSettings 从 ~/.claude/settings.json 只提取安全的最小子集：
+// - env: 只接受字符串类型的值
+// - model: 只接受字符串类型的值
+// 文件缺失/解析失败/超限都返回空。
+func LoadMinimalClaudeSettings() MinimalClaudeSettings {
+	home, err := os.UserHomeDir()
+	if err != nil || home == "" {
+		return MinimalClaudeSettings{}
+	}
+
+	claudeDir := filepath.Clean(filepath.Join(home, ".claude"))
+	settingPath := filepath.Clean(filepath.Join(claudeDir, "settings.json"))
+	rel, err := filepath.Rel(claudeDir, settingPath)
+	if err != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(os.PathSeparator)) {
+		return MinimalClaudeSettings{}
+	}
+
+	info, err := os.Stat(settingPath)
+	if err != nil || info.Size() > MaxClaudeSettingsBytes {
+		return MinimalClaudeSettings{}
+	}
+
+	data, err := os.ReadFile(settingPath) // #nosec G304 -- path is fixed under user home and validated to stay within claudeDir
+	if err != nil {
+		return MinimalClaudeSettings{}
+	}
+
+	var cfg struct {
+		Env   map[string]any `json:"env"`
+		Model any            `json:"model"`
+	}
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		return MinimalClaudeSettings{}
+	}
+
+	out := MinimalClaudeSettings{}
+
+	if model, ok := cfg.Model.(string); ok {
+		out.Model = strings.TrimSpace(model)
+	}
+
+	if len(cfg.Env) == 0 {
+		return out
+	}
+
+	env := make(map[string]string, len(cfg.Env))
+	for k, v := range cfg.Env {
+		s, ok := v.(string)
+		if !ok {
+			continue
+		}
+		env[k] = s
+	}
+	if len(env) == 0 {
+		return out
+	}
+	out.Env = env
+	return out
+}
+
+func LoadMinimalEnvSettings() map[string]string {
+	settings := LoadMinimalClaudeSettings()
+	if len(settings.Env) == 0 {
+		return nil
+	}
+	return settings.Env
+}
+
+func buildClaudeArgs(cfg *config.Config, targetArg string) []string {
+	if cfg == nil {
+		return nil
+	}
+	args := []string{"-p"}
+	// Default to skip permissions unless CODEAGENT_SKIP_PERMISSIONS=false
+	if cfg.SkipPermissions || cfg.Yolo || config.EnvFlagDefaultTrue("CODEAGENT_SKIP_PERMISSIONS") {
+		args = append(args, "--dangerously-skip-permissions")
+	}
+
+	// Prevent infinite recursion: disable all setting sources (user, project, local)
+	// This ensures a clean execution environment without CLAUDE.md or skills that would trigger codeagent
+	args = append(args, "--setting-sources", "")
+
+	if model := strings.TrimSpace(cfg.Model); model != "" {
+		args = append(args, "--model", model)
+	}
+
+	if cfg.Mode == "resume" {
+		if cfg.SessionID != "" {
+			// Claude CLI uses -r <session_id> for resume.
+			args = append(args, "-r", cfg.SessionID)
+		}
+	}
+
+	args = append(args, "--output-format", "stream-json", "--verbose", targetArg)
+
+	return args
+}
--- a/codeagent-wrapper/internal/backend/codex.go
+++ b/codeagent-wrapper/internal/backend/codex.go
@@ -0,0 +1,79 @@
+package backend
+
+import (
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+)
+
+type CodexBackend struct{}
+
+func (CodexBackend) Name() string    { return "codex" }
+func (CodexBackend) Command() string { return "codex" }
+func (CodexBackend) Env(baseURL, apiKey string) map[string]string {
+	baseURL = strings.TrimSpace(baseURL)
+	apiKey = strings.TrimSpace(apiKey)
+	if baseURL == "" && apiKey == "" {
+		return nil
+	}
+	env := make(map[string]string, 2)
+	if baseURL != "" {
+		env["OPENAI_BASE_URL"] = baseURL
+	}
+	if apiKey != "" {
+		env["OPENAI_API_KEY"] = apiKey
+	}
+	return env
+}
+func (CodexBackend) BuildArgs(cfg *config.Config, targetArg string) []string {
+	return BuildCodexArgs(cfg, targetArg)
+}
+
+func BuildCodexArgs(cfg *config.Config, targetArg string) []string {
+	if cfg == nil {
+		panic("buildCodexArgs: nil config")
+	}
+
+	var resumeSessionID string
+	isResume := cfg.Mode == "resume"
+	if isResume {
+		resumeSessionID = strings.TrimSpace(cfg.SessionID)
+		if resumeSessionID == "" {
+			logErrorFn("invalid config: resume mode requires non-empty session_id")
+			isResume = false
+		}
+	}
+
+	args := []string{"e"}
+
+	// Default to bypass sandbox unless CODEX_BYPASS_SANDBOX=false
+	if cfg.Yolo || config.EnvFlagDefaultTrue("CODEX_BYPASS_SANDBOX") {
+		logWarnFn("YOLO mode or CODEX_BYPASS_SANDBOX enabled: running without approval/sandbox protection")
+		args = append(args, "--dangerously-bypass-approvals-and-sandbox")
+	}
+
+	if model := strings.TrimSpace(cfg.Model); model != "" {
+		args = append(args, "--model", model)
+	}
+
+	if reasoningEffort := strings.TrimSpace(cfg.ReasoningEffort); reasoningEffort != "" {
+		args = append(args, "-c", "model_reasoning_effort="+reasoningEffort)
+	}
+
+	args = append(args, "--skip-git-repo-check")
+
+	if isResume {
+		return append(args,
+			"--json",
+			"resume",
+			resumeSessionID,
+			targetArg,
+		)
+	}
+
+	return append(args,
+		"-C", cfg.WorkDir,
+		"--json",
+		targetArg,
+	)
+}
--- a/codeagent-wrapper/internal/backend/gemini.go
+++ b/codeagent-wrapper/internal/backend/gemini.go
@@ -0,0 +1,110 @@
+package backend
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+)
+
+type GeminiBackend struct{}
+
+func (GeminiBackend) Name() string    { return "gemini" }
+func (GeminiBackend) Command() string { return "gemini" }
+func (GeminiBackend) Env(baseURL, apiKey string) map[string]string {
+	baseURL = strings.TrimSpace(baseURL)
+	apiKey = strings.TrimSpace(apiKey)
+	if baseURL == "" && apiKey == "" {
+		return nil
+	}
+	env := make(map[string]string, 2)
+	if baseURL != "" {
+		env["GOOGLE_GEMINI_BASE_URL"] = baseURL
+	}
+	if apiKey != "" {
+		env["GEMINI_API_KEY"] = apiKey
+	}
+	return env
+}
+func (GeminiBackend) BuildArgs(cfg *config.Config, targetArg string) []string {
+	return buildGeminiArgs(cfg, targetArg)
+}
+
+// LoadGeminiEnv loads environment variables from ~/.gemini/.env
+// Supports GEMINI_API_KEY, GEMINI_MODEL, GOOGLE_GEMINI_BASE_URL
+// Also sets GEMINI_API_KEY_AUTH_MECHANISM=bearer for third-party API compatibility
+func LoadGeminiEnv() map[string]string {
+	home, err := os.UserHomeDir()
+	if err != nil || home == "" {
+		return nil
+	}
+
+	envDir := filepath.Clean(filepath.Join(home, ".gemini"))
+	envPath := filepath.Clean(filepath.Join(envDir, ".env"))
+	rel, err := filepath.Rel(envDir, envPath)
+	if err != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(os.PathSeparator)) {
+		return nil
+	}
+
+	data, err := os.ReadFile(envPath) // #nosec G304 -- path is fixed under user home and validated to stay within envDir
+	if err != nil {
+		return nil
+	}
+
+	env := make(map[string]string)
+	for _, line := range strings.Split(string(data), "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		idx := strings.IndexByte(line, '=')
+		if idx <= 0 {
+			continue
+		}
+		key := strings.TrimSpace(line[:idx])
+		value := strings.TrimSpace(line[idx+1:])
+		if key != "" && value != "" {
+			env[key] = value
+		}
+	}
+
+	// Set bearer auth mechanism for third-party API compatibility
+	if _, ok := env["GEMINI_API_KEY"]; ok {
+		if _, hasAuth := env["GEMINI_API_KEY_AUTH_MECHANISM"]; !hasAuth {
+			env["GEMINI_API_KEY_AUTH_MECHANISM"] = "bearer"
+		}
+	}
+
+	if len(env) == 0 {
+		return nil
+	}
+	return env
+}
+
+func buildGeminiArgs(cfg *config.Config, targetArg string) []string {
+	if cfg == nil {
+		return nil
+	}
+	args := []string{"-o", "stream-json", "-y"}
+
+	if model := strings.TrimSpace(cfg.Model); model != "" {
+		args = append(args, "-m", model)
+	}
+
+	if cfg.Mode == "resume" {
+		if cfg.SessionID != "" {
+			args = append(args, "-r", cfg.SessionID)
+		}
+	}
+
+	// Use positional argument instead of deprecated -p flag.
+	// For stdin mode ("-"), use -p to read from stdin.
+	if targetArg == "-" {
+		args = append(args, "-p", targetArg)
+	} else {
+		args = append(args, targetArg)
+	}
+
+	return args
+}
--- a/codeagent-wrapper/internal/backend/opencode.go
+++ b/codeagent-wrapper/internal/backend/opencode.go
@@ -0,0 +1,29 @@
+package backend
+
+import (
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+)
+
+type OpencodeBackend struct{}
+
+func (OpencodeBackend) Name() string                                 { return "opencode" }
+func (OpencodeBackend) Command() string                              { return "opencode" }
+func (OpencodeBackend) Env(baseURL, apiKey string) map[string]string { return nil }
+func (OpencodeBackend) BuildArgs(cfg *config.Config, targetArg string) []string {
+	args := []string{"run"}
+	if cfg != nil {
+		if model := strings.TrimSpace(cfg.Model); model != "" {
+			args = append(args, "-m", model)
+		}
+		if cfg.Mode == "resume" && cfg.SessionID != "" {
+			args = append(args, "-s", cfg.SessionID)
+		}
+	}
+	args = append(args, "--format", "json")
+	if targetArg != "-" {
+		args = append(args, targetArg)
+	}
+	return args
+}
--- a/codeagent-wrapper/internal/backend/registry.go
+++ b/codeagent-wrapper/internal/backend/registry.go
@@ -0,0 +1,29 @@
+package backend
+
+import (
+	"fmt"
+	"strings"
+)
+
+var registry = map[string]Backend{
+	"codex":    CodexBackend{},
+	"claude":   ClaudeBackend{},
+	"gemini":   GeminiBackend{},
+	"opencode": OpencodeBackend{},
+}
+
+// Registry exposes the available backends. Intended for internal inspection/tests.
+func Registry() map[string]Backend {
+	return registry
+}
+
+func Select(name string) (Backend, error) {
+	key := strings.ToLower(strings.TrimSpace(name))
+	if key == "" {
+		key = "codex"
+	}
+	if backend, ok := registry[key]; ok {
+		return backend, nil
+	}
+	return nil, fmt.Errorf("unsupported backend %q", name)
+}
--- a/codeagent-wrapper/internal/config/agent.go
+++ b/codeagent-wrapper/internal/config/agent.go
@@ -0,0 +1,220 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	ilogger "codeagent-wrapper/internal/logger"
+
+	"github.com/goccy/go-json"
+)
+
+type BackendConfig struct {
+	BaseURL string `json:"base_url,omitempty"`
+	APIKey  string `json:"api_key,omitempty"`
+}
+
+type AgentModelConfig struct {
+	Backend     string `json:"backend"`
+	Model       string `json:"model"`
+	PromptFile  string `json:"prompt_file,omitempty"`
+	Description string `json:"description,omitempty"`
+	Yolo        bool   `json:"yolo,omitempty"`
+	Reasoning   string `json:"reasoning,omitempty"`
+	BaseURL     string `json:"base_url,omitempty"`
+	APIKey      string `json:"api_key,omitempty"`
+}
+
+type ModelsConfig struct {
+	DefaultBackend string                      `json:"default_backend"`
+	DefaultModel   string                      `json:"default_model"`
+	Agents         map[string]AgentModelConfig `json:"agents"`
+	Backends       map[string]BackendConfig    `json:"backends,omitempty"`
+}
+
+var defaultModelsConfig = ModelsConfig{
+	DefaultBackend: "opencode",
+	DefaultModel:   "opencode/grok-code",
+	Agents: map[string]AgentModelConfig{
+		"oracle":                  {Backend: "claude", Model: "claude-opus-4-5-20251101", PromptFile: "~/.claude/skills/omo/references/oracle.md", Description: "Technical advisor"},
+		"librarian":               {Backend: "claude", Model: "claude-sonnet-4-5-20250929", PromptFile: "~/.claude/skills/omo/references/librarian.md", Description: "Researcher"},
+		"explore":                 {Backend: "opencode", Model: "opencode/grok-code", PromptFile: "~/.claude/skills/omo/references/explore.md", Description: "Code search"},
+		"develop":                 {Backend: "codex", Model: "", PromptFile: "~/.claude/skills/omo/references/develop.md", Description: "Code development"},
+		"frontend-ui-ux-engineer": {Backend: "gemini", Model: "", PromptFile: "~/.claude/skills/omo/references/frontend-ui-ux-engineer.md", Description: "Frontend engineer"},
+		"document-writer":         {Backend: "gemini", Model: "", PromptFile: "~/.claude/skills/omo/references/document-writer.md", Description: "Documentation"},
+	},
+}
+
+var (
+	modelsConfigOnce   sync.Once
+	modelsConfigCached *ModelsConfig
+)
+
+func modelsConfig() *ModelsConfig {
+	modelsConfigOnce.Do(func() {
+		modelsConfigCached = loadModelsConfig()
+	})
+	if modelsConfigCached == nil {
+		return &defaultModelsConfig
+	}
+	return modelsConfigCached
+}
+
+func loadModelsConfig() *ModelsConfig {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		ilogger.LogWarn(fmt.Sprintf("Failed to resolve home directory for models config: %v; using defaults", err))
+		return &defaultModelsConfig
+	}
+
+	configDir := filepath.Clean(filepath.Join(home, ".codeagent"))
+	configPath := filepath.Clean(filepath.Join(configDir, "models.json"))
+	rel, err := filepath.Rel(configDir, configPath)
+	if err != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(os.PathSeparator)) {
+		return &defaultModelsConfig
+	}
+
+	data, err := os.ReadFile(configPath) // #nosec G304 -- path is fixed under user home and validated to stay within configDir
+	if err != nil {
+		if !os.IsNotExist(err) {
+			ilogger.LogWarn(fmt.Sprintf("Failed to read models config %s: %v; using defaults", configPath, err))
+		}
+		return &defaultModelsConfig
+	}
+
+	var cfg ModelsConfig
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		ilogger.LogWarn(fmt.Sprintf("Failed to parse models config %s: %v; using defaults", configPath, err))
+		return &defaultModelsConfig
+	}
+
+	cfg.DefaultBackend = strings.TrimSpace(cfg.DefaultBackend)
+	if cfg.DefaultBackend == "" {
+		cfg.DefaultBackend = defaultModelsConfig.DefaultBackend
+	}
+	cfg.DefaultModel = strings.TrimSpace(cfg.DefaultModel)
+	if cfg.DefaultModel == "" {
+		cfg.DefaultModel = defaultModelsConfig.DefaultModel
+	}
+
+	// Merge with defaults
+	for name, agent := range defaultModelsConfig.Agents {
+		if _, exists := cfg.Agents[name]; !exists {
+			if cfg.Agents == nil {
+				cfg.Agents = make(map[string]AgentModelConfig)
+			}
+			cfg.Agents[name] = agent
+		}
+	}
+
+	// Normalize backend keys so lookups can be case-insensitive.
+	if len(cfg.Backends) > 0 {
+		normalized := make(map[string]BackendConfig, len(cfg.Backends))
+		for k, v := range cfg.Backends {
+			key := strings.ToLower(strings.TrimSpace(k))
+			if key == "" {
+				continue
+			}
+			normalized[key] = v
+		}
+		if len(normalized) > 0 {
+			cfg.Backends = normalized
+		} else {
+			cfg.Backends = nil
+		}
+	}
+
+	return &cfg
+}
+
+func LoadDynamicAgent(name string) (AgentModelConfig, bool) {
+	if err := ValidateAgentName(name); err != nil {
+		return AgentModelConfig{}, false
+	}
+
+	home, err := os.UserHomeDir()
+	if err != nil || strings.TrimSpace(home) == "" {
+		return AgentModelConfig{}, false
+	}
+
+	absPath := filepath.Join(home, ".codeagent", "agents", name+".md")
+	info, err := os.Stat(absPath)
+	if err != nil || info.IsDir() {
+		return AgentModelConfig{}, false
+	}
+
+	return AgentModelConfig{PromptFile: "~/.codeagent/agents/" + name + ".md"}, true
+}
+
+func ResolveBackendConfig(backendName string) (baseURL, apiKey string) {
+	cfg := modelsConfig()
+	resolved := resolveBackendConfig(cfg, backendName)
+	return strings.TrimSpace(resolved.BaseURL), strings.TrimSpace(resolved.APIKey)
+}
+
+func resolveBackendConfig(cfg *ModelsConfig, backendName string) BackendConfig {
+	if cfg == nil || len(cfg.Backends) == 0 {
+		return BackendConfig{}
+	}
+	key := strings.ToLower(strings.TrimSpace(backendName))
+	if key == "" {
+		key = strings.ToLower(strings.TrimSpace(cfg.DefaultBackend))
+	}
+	if key == "" {
+		return BackendConfig{}
+	}
+	if backend, ok := cfg.Backends[key]; ok {
+		return backend
+	}
+	return BackendConfig{}
+}
+
+func resolveAgentConfig(agentName string) (backend, model, promptFile, reasoning, baseURL, apiKey string, yolo bool) {
+	cfg := modelsConfig()
+	if agent, ok := cfg.Agents[agentName]; ok {
+		backend = strings.TrimSpace(agent.Backend)
+		if backend == "" {
+			backend = cfg.DefaultBackend
+		}
+		backendCfg := resolveBackendConfig(cfg, backend)
+
+		baseURL = strings.TrimSpace(agent.BaseURL)
+		if baseURL == "" {
+			baseURL = strings.TrimSpace(backendCfg.BaseURL)
+		}
+		apiKey = strings.TrimSpace(agent.APIKey)
+		if apiKey == "" {
+			apiKey = strings.TrimSpace(backendCfg.APIKey)
+		}
+
+		return backend, strings.TrimSpace(agent.Model), agent.PromptFile, agent.Reasoning, baseURL, apiKey, agent.Yolo
+	}
+
+	if dynamic, ok := LoadDynamicAgent(agentName); ok {
+		backend = cfg.DefaultBackend
+		model = cfg.DefaultModel
+		backendCfg := resolveBackendConfig(cfg, backend)
+		baseURL = strings.TrimSpace(backendCfg.BaseURL)
+		apiKey = strings.TrimSpace(backendCfg.APIKey)
+		return backend, model, dynamic.PromptFile, "", baseURL, apiKey, false
+	}
+
+	backend = cfg.DefaultBackend
+	model = cfg.DefaultModel
+	backendCfg := resolveBackendConfig(cfg, backend)
+	baseURL = strings.TrimSpace(backendCfg.BaseURL)
+	apiKey = strings.TrimSpace(backendCfg.APIKey)
+	return backend, model, "", "", baseURL, apiKey, false
+}
+
+func ResolveAgentConfig(agentName string) (backend, model, promptFile, reasoning, baseURL, apiKey string, yolo bool) {
+	return resolveAgentConfig(agentName)
+}
+
+func ResetModelsConfigCacheForTest() {
+	modelsConfigCached = nil
+	modelsConfigOnce = sync.Once{}
+}
--- a/codeagent-wrapper/internal/config/agent_config_test.go
+++ b/codeagent-wrapper/internal/config/agent_config_test.go
@@ -0,0 +1,221 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestResolveAgentConfig_Defaults(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	// Test that default agents resolve correctly without config file
+	tests := []struct {
+		agent          string
+		wantBackend    string
+		wantModel      string
+		wantPromptFile string
+	}{
+		{"oracle", "claude", "claude-opus-4-5-20251101", "~/.claude/skills/omo/references/oracle.md"},
+		{"librarian", "claude", "claude-sonnet-4-5-20250929", "~/.claude/skills/omo/references/librarian.md"},
+		{"explore", "opencode", "opencode/grok-code", "~/.claude/skills/omo/references/explore.md"},
+		{"frontend-ui-ux-engineer", "gemini", "", "~/.claude/skills/omo/references/frontend-ui-ux-engineer.md"},
+		{"document-writer", "gemini", "", "~/.claude/skills/omo/references/document-writer.md"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.agent, func(t *testing.T) {
+			backend, model, promptFile, _, _, _, _ := resolveAgentConfig(tt.agent)
+			if backend != tt.wantBackend {
+				t.Errorf("backend = %q, want %q", backend, tt.wantBackend)
+			}
+			if model != tt.wantModel {
+				t.Errorf("model = %q, want %q", model, tt.wantModel)
+			}
+			if promptFile != tt.wantPromptFile {
+				t.Errorf("promptFile = %q, want %q", promptFile, tt.wantPromptFile)
+			}
+		})
+	}
+}
+
+func TestResolveAgentConfig_UnknownAgent(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	backend, model, promptFile, _, _, _, _ := resolveAgentConfig("unknown-agent")
+	if backend != "opencode" {
+		t.Errorf("unknown agent backend = %q, want %q", backend, "opencode")
+	}
+	if model != "opencode/grok-code" {
+		t.Errorf("unknown agent model = %q, want %q", model, "opencode/grok-code")
+	}
+	if promptFile != "" {
+		t.Errorf("unknown agent promptFile = %q, want empty", promptFile)
+	}
+}
+
+func TestLoadModelsConfig_NoFile(t *testing.T) {
+	home := "/nonexistent/path/that/does/not/exist"
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	cfg := loadModelsConfig()
+	if cfg.DefaultBackend != "opencode" {
+		t.Errorf("DefaultBackend = %q, want %q", cfg.DefaultBackend, "opencode")
+	}
+	if len(cfg.Agents) != 6 {
+		t.Errorf("len(Agents) = %d, want 6", len(cfg.Agents))
+	}
+}
+
+func TestLoadModelsConfig_WithFile(t *testing.T) {
+	// Create temp dir and config file
+	tmpDir := t.TempDir()
+	configDir := filepath.Join(tmpDir, ".codeagent")
+	if err := os.MkdirAll(configDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	configContent := `{
+		"default_backend": "claude",
+		"default_model": "claude-opus-4",
+		"backends": {
+			"Claude": {
+				"base_url": "https://backend.example",
+				"api_key": "backend-key"
+			},
+			"codex": {
+				"base_url": "https://openai.example",
+				"api_key": "openai-key"
+			}
+		},
+		"agents": {
+			"custom-agent": {
+				"backend": "codex",
+				"model": "gpt-4o",
+				"description": "Custom agent",
+				"base_url": "https://agent.example",
+				"api_key": "agent-key"
+			}
+		}
+	}`
+	configPath := filepath.Join(configDir, "models.json")
+	if err := os.WriteFile(configPath, []byte(configContent), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	t.Setenv("HOME", tmpDir)
+	t.Setenv("USERPROFILE", tmpDir)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	cfg := loadModelsConfig()
+
+	if cfg.DefaultBackend != "claude" {
+		t.Errorf("DefaultBackend = %q, want %q", cfg.DefaultBackend, "claude")
+	}
+	if cfg.DefaultModel != "claude-opus-4" {
+		t.Errorf("DefaultModel = %q, want %q", cfg.DefaultModel, "claude-opus-4")
+	}
+
+	// Check custom agent
+	if agent, ok := cfg.Agents["custom-agent"]; !ok {
+		t.Error("custom-agent not found")
+	} else {
+		if agent.Backend != "codex" {
+			t.Errorf("custom-agent.Backend = %q, want %q", agent.Backend, "codex")
+		}
+		if agent.Model != "gpt-4o" {
+			t.Errorf("custom-agent.Model = %q, want %q", agent.Model, "gpt-4o")
+		}
+	}
+
+	// Check that defaults are merged
+	if _, ok := cfg.Agents["oracle"]; !ok {
+		t.Error("default agent oracle should be merged")
+	}
+
+	baseURL, apiKey := ResolveBackendConfig("claude")
+	if baseURL != "https://backend.example" {
+		t.Errorf("ResolveBackendConfig(baseURL) = %q, want %q", baseURL, "https://backend.example")
+	}
+	if apiKey != "backend-key" {
+		t.Errorf("ResolveBackendConfig(apiKey) = %q, want %q", apiKey, "backend-key")
+	}
+
+	backend, model, _, _, agentBaseURL, agentAPIKey, _ := ResolveAgentConfig("custom-agent")
+	if backend != "codex" {
+		t.Errorf("ResolveAgentConfig(backend) = %q, want %q", backend, "codex")
+	}
+	if model != "gpt-4o" {
+		t.Errorf("ResolveAgentConfig(model) = %q, want %q", model, "gpt-4o")
+	}
+	if agentBaseURL != "https://agent.example" {
+		t.Errorf("ResolveAgentConfig(baseURL) = %q, want %q", agentBaseURL, "https://agent.example")
+	}
+	if agentAPIKey != "agent-key" {
+		t.Errorf("ResolveAgentConfig(apiKey) = %q, want %q", agentAPIKey, "agent-key")
+	}
+}
+
+func TestResolveAgentConfig_DynamicAgent(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	agentDir := filepath.Join(home, ".codeagent", "agents")
+	if err := os.MkdirAll(agentDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(agentDir, "sarsh.md"), []byte("prompt\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	backend, model, promptFile, _, _, _, _ := resolveAgentConfig("sarsh")
+	if backend != "opencode" {
+		t.Errorf("backend = %q, want %q", backend, "opencode")
+	}
+	if model != "opencode/grok-code" {
+		t.Errorf("model = %q, want %q", model, "opencode/grok-code")
+	}
+	if promptFile != "~/.codeagent/agents/sarsh.md" {
+		t.Errorf("promptFile = %q, want %q", promptFile, "~/.codeagent/agents/sarsh.md")
+	}
+}
+
+func TestLoadModelsConfig_InvalidJSON(t *testing.T) {
+	tmpDir := t.TempDir()
+	configDir := filepath.Join(tmpDir, ".codeagent")
+	if err := os.MkdirAll(configDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	// Write invalid JSON
+	configPath := filepath.Join(configDir, "models.json")
+	if err := os.WriteFile(configPath, []byte("invalid json {"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	t.Setenv("HOME", tmpDir)
+	t.Setenv("USERPROFILE", tmpDir)
+	t.Cleanup(ResetModelsConfigCacheForTest)
+	ResetModelsConfigCacheForTest()
+
+	cfg := loadModelsConfig()
+	// Should fall back to defaults
+	if cfg.DefaultBackend != "opencode" {
+		t.Errorf("invalid JSON should fallback, got DefaultBackend = %q", cfg.DefaultBackend)
+	}
+}
--- a/codeagent-wrapper/internal/config/config.go
+++ b/codeagent-wrapper/internal/config/config.go
@@ -0,0 +1,102 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// Config holds CLI configuration.
+type Config struct {
+	Mode               string // "new" or "resume"
+	Task               string
+	SessionID          string
+	WorkDir            string
+	Model              string
+	ReasoningEffort    string
+	ExplicitStdin      bool
+	Timeout            int
+	Backend            string
+	Agent              string
+	PromptFile         string
+	PromptFileExplicit bool
+	SkipPermissions    bool
+	Yolo               bool
+	MaxParallelWorkers int
+}
+
+// EnvFlagEnabled returns true when the environment variable exists and is not
+// explicitly set to a falsey value ("0/false/no/off").
+func EnvFlagEnabled(key string) bool {
+	val, ok := os.LookupEnv(key)
+	if !ok {
+		return false
+	}
+	val = strings.TrimSpace(strings.ToLower(val))
+	switch val {
+	case "", "0", "false", "no", "off":
+		return false
+	default:
+		return true
+	}
+}
+
+func ParseBoolFlag(val string, defaultValue bool) bool {
+	val = strings.TrimSpace(strings.ToLower(val))
+	switch val {
+	case "1", "true", "yes", "on":
+		return true
+	case "0", "false", "no", "off":
+		return false
+	default:
+		return defaultValue
+	}
+}
+
+// EnvFlagDefaultTrue returns true unless the env var is explicitly set to
+// false/0/no/off.
+func EnvFlagDefaultTrue(key string) bool {
+	val, ok := os.LookupEnv(key)
+	if !ok {
+		return true
+	}
+	return ParseBoolFlag(val, true)
+}
+
+func ValidateAgentName(name string) error {
+	if strings.TrimSpace(name) == "" {
+		return fmt.Errorf("agent name is empty")
+	}
+	for _, r := range name {
+		switch {
+		case r >= 'a' && r <= 'z':
+		case r >= 'A' && r <= 'Z':
+		case r >= '0' && r <= '9':
+		case r == '-', r == '_':
+		default:
+			return fmt.Errorf("agent name %q contains invalid character %q", name, r)
+		}
+	}
+	return nil
+}
+
+const maxParallelWorkersLimit = 100
+
+// ResolveMaxParallelWorkers reads CODEAGENT_MAX_PARALLEL_WORKERS. It returns 0
+// for "unlimited".
+func ResolveMaxParallelWorkers() int {
+	raw := strings.TrimSpace(os.Getenv("CODEAGENT_MAX_PARALLEL_WORKERS"))
+	if raw == "" {
+		return 0
+	}
+
+	value, err := strconv.Atoi(raw)
+	if err != nil || value < 0 {
+		return 0
+	}
+	if value > maxParallelWorkersLimit {
+		return maxParallelWorkersLimit
+	}
+	return value
+}
--- a/codeagent-wrapper/internal/config/viper.go
+++ b/codeagent-wrapper/internal/config/viper.go
@@ -0,0 +1,47 @@
+package config
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+// NewViper returns a viper instance configured for CODEAGENT_* environment
+// variables and an optional config file.
+//
+// Search order when configFile is empty:
+//   - $HOME/.codeagent/config.(yaml|yml|json|toml|...)
+func NewViper(configFile string) (*viper.Viper, error) {
+	v := viper.New()
+	v.SetEnvPrefix("CODEAGENT")
+	v.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	v.AutomaticEnv()
+
+	if strings.TrimSpace(configFile) != "" {
+		v.SetConfigFile(configFile)
+		if err := v.ReadInConfig(); err != nil {
+			return nil, err
+		}
+		return v, nil
+	}
+
+	home, err := os.UserHomeDir()
+	if err != nil || strings.TrimSpace(home) == "" {
+		return v, nil
+	}
+
+	v.SetConfigName("config")
+	v.AddConfigPath(filepath.Join(home, ".codeagent"))
+	if err := v.ReadInConfig(); err != nil {
+		var notFound viper.ConfigFileNotFoundError
+		if errors.As(err, &notFound) {
+			return v, nil
+		}
+		return nil, err
+	}
+
+	return v, nil
+}
--- a/codeagent-wrapper/internal/executor/executor.go
+++ b/codeagent-wrapper/internal/executor/executor.go
@@ -1,4 +1,4 @@
-package main
+package executor

 import (
 	"context"
@@ -14,15 +14,98 @@ import (
 	"sync/atomic"
 	"syscall"
 	"time"
+
+	backend "codeagent-wrapper/internal/backend"
+	config "codeagent-wrapper/internal/config"
+	ilogger "codeagent-wrapper/internal/logger"
+	parser "codeagent-wrapper/internal/parser"
+	utils "codeagent-wrapper/internal/utils"
 )

 const postMessageTerminateDelay = 1 * time.Second
+const forceKillWaitTimeout = 5 * time.Second
+
+// Defaults duplicated from wrapper for module decoupling.
+const (
+	defaultWorkdir        = "."
+	defaultCoverageTarget = 90.0
+	defaultBackendName    = "codex"
+
+	codexLogLineLimit  = 1000
+	stderrCaptureLimit = 4 * 1024
+)
+
+const (
+	// stdout close reasons
+	stdoutCloseReasonWait  = "wait-done"
+	stdoutCloseReasonDrain = "drain-timeout"
+	stdoutCloseReasonCtx   = "context-cancel"
+	stdoutDrainTimeout     = 100 * time.Millisecond
+)
+
+// Hook points (tests can override inside this package).
+var (
+	selectBackendFn    = backend.Select
+	commandContext     = exec.CommandContext
+	terminateCommandFn = terminateCommand
+)
+
+var forceKillDelay atomic.Int32
+
+func init() {
+	forceKillDelay.Store(5) // seconds - default value
+}
+
+type (
+	Backend = backend.Backend
+	Config  = config.Config
+	Logger  = ilogger.Logger
+)
+
+type minimalClaudeSettings = backend.MinimalClaudeSettings
+
+func loadMinimalClaudeSettings() minimalClaudeSettings { return backend.LoadMinimalClaudeSettings() }
+
+func loadGeminiEnv() map[string]string { return backend.LoadGeminiEnv() }
+
+func NewLogger() (*Logger, error) { return ilogger.NewLogger() }
+
+func NewLoggerWithSuffix(suffix string) (*Logger, error) { return ilogger.NewLoggerWithSuffix(suffix) }
+
+func setLogger(l *Logger) { ilogger.SetLogger(l) }
+
+func closeLogger() error { return ilogger.CloseLogger() }
+
+func activeLogger() *Logger { return ilogger.ActiveLogger() }
+
+func logInfo(msg string) { ilogger.LogInfo(msg) }
+
+func logWarn(msg string) { ilogger.LogWarn(msg) }
+
+func logError(msg string) { ilogger.LogError(msg) }
+
+func logConcurrencyPlanning(limit, total int) { ilogger.LogConcurrencyPlanning(limit, total) }
+
+func logConcurrencyState(event, taskID string, active, limit int) {
+	ilogger.LogConcurrencyState(event, taskID, active, limit)
+}
+
+func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(string), onMessage func(), onComplete func()) (message, threadID string) {
+	return parser.ParseJSONStreamInternal(r, warnFn, infoFn, onMessage, onComplete)
+}
+
+func sanitizeOutput(s string) string { return utils.SanitizeOutput(s) }
+
+func safeTruncate(s string, maxLen int) string { return utils.SafeTruncate(s, maxLen) }
+
+func min(a, b int) int { return utils.Min(a, b) }

 // commandRunner abstracts exec.Cmd for testability
 type commandRunner interface {
 	Start() error
 	Wait() error
 	StdoutPipe() (io.ReadCloser, error)
+	StderrPipe() (io.ReadCloser, error)
 	StdinPipe() (io.WriteCloser, error)
 	SetStderr(io.Writer)
 	SetDir(string)
@@ -63,6 +146,13 @@ func (r *realCmd) StdoutPipe() (io.ReadCloser, error) {
 	return r.cmd.StdoutPipe()
 }

+func (r *realCmd) StderrPipe() (io.ReadCloser, error) {
+	if r.cmd == nil {
+		return nil, errors.New("command is nil")
+	}
+	return r.cmd.StderrPipe()
+}
+
 func (r *realCmd) StdinPipe() (io.WriteCloser, error) {
 	if r.cmd == nil {
 		return nil, errors.New("command is nil")
@@ -221,14 +311,21 @@ func newTaskLoggerHandle(taskID string) taskLoggerHandle {
 }

 // defaultRunCodexTaskFn is the default implementation of runCodexTaskFn (exposed for test reset)
-func defaultRunCodexTaskFn(task TaskSpec, timeout int) TaskResult {
+func DefaultRunCodexTaskFn(task TaskSpec, timeout int) TaskResult {
 	if task.WorkDir == "" {
 		task.WorkDir = defaultWorkdir
 	}
 	if task.Mode == "" {
 		task.Mode = "new"
 	}
-	if task.UseStdin || shouldUseStdin(task.Task, false) {
+	if strings.TrimSpace(task.PromptFile) != "" {
+		prompt, err := ReadAgentPromptFile(task.PromptFile, false)
+		if err != nil {
+			return TaskResult{TaskID: task.ID, ExitCode: 1, Error: "failed to read prompt file: " + err.Error()}
+		}
+		task.Task = WrapTaskWithAgentPrompt(prompt, task.Task)
+	}
+	if task.UseStdin || ShouldUseStdin(task.Task, false) {
 		task.UseStdin = true
 	}

@@ -247,12 +344,10 @@ func defaultRunCodexTaskFn(task TaskSpec, timeout int) TaskResult {
 	if parentCtx == nil {
 		parentCtx = context.Background()
 	}
-	return runCodexTaskWithContext(parentCtx, task, backend, nil, false, true, timeout)
+	return RunCodexTaskWithContext(parentCtx, task, backend, "", nil, nil, false, true, timeout)
 }

-var runCodexTaskFn = defaultRunCodexTaskFn
-
-func topologicalSort(tasks []TaskSpec) ([][]TaskSpec, error) {
+func TopologicalSort(tasks []TaskSpec) ([][]TaskSpec, error) {
 	idToTask := make(map[string]TaskSpec, len(tasks))
 	indegree := make(map[string]int, len(tasks))
 	adj := make(map[string][]string, len(tasks))
@@ -318,12 +413,16 @@ func topologicalSort(tasks []TaskSpec) ([][]TaskSpec, error) {
 	return layers, nil
 }

-func executeConcurrent(layers [][]TaskSpec, timeout int) []TaskResult {
-	maxWorkers := resolveMaxParallelWorkers()
-	return executeConcurrentWithContext(context.Background(), layers, timeout, maxWorkers)
+func ExecuteConcurrent(layers [][]TaskSpec, timeout int, runTask func(TaskSpec, int) TaskResult) []TaskResult {
+	maxWorkers := config.ResolveMaxParallelWorkers()
+	return ExecuteConcurrentWithContext(context.Background(), layers, timeout, maxWorkers, runTask)
 }

-func executeConcurrentWithContext(parentCtx context.Context, layers [][]TaskSpec, timeout int, maxWorkers int) []TaskResult {
+func ExecuteConcurrentWithContext(parentCtx context.Context, layers [][]TaskSpec, timeout int, maxWorkers int, runTask func(TaskSpec, int) TaskResult) []TaskResult {
+	if runTask == nil {
+		runTask = DefaultRunCodexTaskFn
+	}
+
 	totalTasks := 0
 	for _, layer := range layers {
 		totalTasks += len(layer)
@@ -454,7 +553,7 @@ func executeConcurrentWithContext(parentCtx context.Context, layers [][]TaskSpec

 				printTaskStart(ts.ID, taskLogPath, handle.shared)

-				res := runCodexTaskFn(ts, timeout)
+				res := runTask(ts, timeout)
 				if taskLogPath != "" {
 					if res.LogPath == "" || (handle.shared && handle.logger != nil && res.LogPath == handle.logger.Path()) {
 						res.LogPath = taskLogPath
@@ -519,14 +618,14 @@ func getStatusSymbols() (success, warning, failed string) {
 	return "✓", "⚠️", "✗"
 }

-func generateFinalOutput(results []TaskResult) string {
-	return generateFinalOutputWithMode(results, true) // default to summary mode
+func GenerateFinalOutput(results []TaskResult) string {
+	return GenerateFinalOutputWithMode(results, true) // default to summary mode
 }

 // generateFinalOutputWithMode generates output based on mode
 // summaryOnly=true: structured report - every token has value
 // summaryOnly=false: full output with complete messages (legacy behavior)
-func generateFinalOutputWithMode(results []TaskResult, summaryOnly bool) string {
+func GenerateFinalOutputWithMode(results []TaskResult, summaryOnly bool) string {
 	var sb strings.Builder
 	successSymbol, warningSymbol, failedSymbol := getStatusSymbols()

@@ -739,11 +838,20 @@ func buildCodexArgs(cfg *Config, targetArg string) []string {

 	args := []string{"e"}

-	if envFlagEnabled("CODEX_BYPASS_SANDBOX") {
-		logWarn("CODEX_BYPASS_SANDBOX=true: running without approval/sandbox protection")
+	// Default to bypass sandbox unless CODEX_BYPASS_SANDBOX=false
+	if cfg.Yolo || config.EnvFlagDefaultTrue("CODEX_BYPASS_SANDBOX") {
+		logWarn("YOLO mode or CODEX_BYPASS_SANDBOX enabled: running without approval/sandbox protection")
 		args = append(args, "--dangerously-bypass-approvals-and-sandbox")
 	}

+	if model := strings.TrimSpace(cfg.Model); model != "" {
+		args = append(args, "--model", model)
+	}
+
+	if reasoningEffort := strings.TrimSpace(cfg.ReasoningEffort); reasoningEffort != "" {
+		args = append(args, "-c", "model_reasoning_effort="+reasoningEffort)
+	}
+
 	args = append(args, "--skip-git-repo-check")

 	if isResume {
@@ -762,37 +870,41 @@ func buildCodexArgs(cfg *Config, targetArg string) []string {
 	)
 }

-func runCodexTask(taskSpec TaskSpec, silent bool, timeoutSec int) TaskResult {
-	return runCodexTaskWithContext(context.Background(), taskSpec, nil, nil, false, silent, timeoutSec)
-}
-
-func runCodexProcess(parentCtx context.Context, codexArgs []string, taskText string, useStdin bool, timeoutSec int) (message, threadID string, exitCode int) {
-	res := runCodexTaskWithContext(parentCtx, TaskSpec{Task: taskText, WorkDir: defaultWorkdir, Mode: "new", UseStdin: useStdin}, nil, codexArgs, true, false, timeoutSec)
-	return res.Message, res.SessionID, res.ExitCode
-}
-
-func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backend Backend, customArgs []string, useCustomArgs bool, silent bool, timeoutSec int) TaskResult {
+func RunCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backend Backend, defaultCommandName string, defaultArgsBuilder func(*Config, string) []string, customArgs []string, useCustomArgs bool, silent bool, timeoutSec int) TaskResult {
+	taskCtx := taskSpec.Context
 	if parentCtx == nil {
-		parentCtx = taskSpec.Context
+		parentCtx = taskCtx
 	}
 	if parentCtx == nil {
 		parentCtx = context.Background()
 	}

 	result := TaskResult{TaskID: taskSpec.ID}
-	injectedLogger := taskLoggerFromContext(parentCtx)
+	injectedLogger := taskLoggerFromContext(taskCtx)
+	if injectedLogger == nil {
+		injectedLogger = taskLoggerFromContext(parentCtx)
+	}
 	logger := injectedLogger

 	cfg := &Config{
-		Mode:      taskSpec.Mode,
-		Task:      taskSpec.Task,
-		SessionID: taskSpec.SessionID,
-		WorkDir:   taskSpec.WorkDir,
-		Backend:   defaultBackendName,
+		Mode:            taskSpec.Mode,
+		Task:            taskSpec.Task,
+		SessionID:       taskSpec.SessionID,
+		WorkDir:         taskSpec.WorkDir,
+		Model:           taskSpec.Model,
+		ReasoningEffort: taskSpec.ReasoningEffort,
+		SkipPermissions: taskSpec.SkipPermissions,
+		Backend:         defaultBackendName,
 	}

-	commandName := codexCommand
-	argsBuilder := buildCodexArgsFn
+	commandName := strings.TrimSpace(defaultCommandName)
+	if commandName == "" {
+		commandName = defaultBackendName
+	}
+	argsBuilder := defaultArgsBuilder
+	if argsBuilder == nil {
+		argsBuilder = buildCodexArgs
+	}
 	if backend != nil {
 		commandName = backend.Command()
 		argsBuilder = backend.BuildArgs
@@ -816,6 +928,25 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 		return result
 	}

+	var fileEnv map[string]string
+	if cfg.Backend == "claude" {
+		settings := loadMinimalClaudeSettings()
+		fileEnv = settings.Env
+		if cfg.Mode != "resume" && strings.TrimSpace(cfg.Model) == "" && settings.Model != "" {
+			cfg.Model = settings.Model
+		}
+	}
+
+	// Load gemini env from ~/.gemini/.env if exists
+	if cfg.Backend == "gemini" {
+		fileEnv = loadGeminiEnv()
+		if cfg.Mode != "resume" && strings.TrimSpace(cfg.Model) == "" {
+			if model := fileEnv["GEMINI_MODEL"]; model != "" {
+				cfg.Model = model
+			}
+		}
+	}
+
 	useStdin := taskSpec.UseStdin
 	targetArg := taskSpec.Task
 	if useStdin {
@@ -915,9 +1046,27 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe

 	cmd := newCommandRunner(ctx, commandName, codexArgs...)

-	if cfg.Backend == "claude" {
-		if env := loadMinimalEnvSettings(); len(env) > 0 {
-			cmd.SetEnv(env)
+	if len(fileEnv) > 0 {
+		cmd.SetEnv(fileEnv)
+	}
+
+	envBackend := backend
+	if envBackend == nil && cfg.Backend != "" {
+		if b, err := selectBackendFn(cfg.Backend); err == nil {
+			envBackend = b
+		}
+	}
+
+	if envBackend != nil {
+		baseURL, apiKey := config.ResolveBackendConfig(cfg.Backend)
+		if agentName := strings.TrimSpace(taskSpec.Agent); agentName != "" {
+			agentBackend, _, _, _, agentBaseURL, agentAPIKey, _ := config.ResolveAgentConfig(agentName)
+			if strings.EqualFold(strings.TrimSpace(agentBackend), strings.TrimSpace(cfg.Backend)) {
+				baseURL, apiKey = agentBaseURL, agentAPIKey
+			}
+		}
+		if injected := envBackend.Env(baseURL, apiKey); len(injected) > 0 {
+			cmd.SetEnv(injected)
 		}
 	}

@@ -939,33 +1088,43 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 		if cfg.Backend == "gemini" {
 			stderrFilter = newFilteringWriter(os.Stderr, geminiNoisePatterns)
 			stderrOut = stderrFilter
-			defer stderrFilter.Flush()
+		} else if cfg.Backend == "codex" {
+			stderrFilter = newFilteringWriter(os.Stderr, codexNoisePatterns)
+			stderrOut = stderrFilter
 		}
 		stderrWriters = append([]io.Writer{stderrOut}, stderrWriters...)
 	}
-	if len(stderrWriters) == 1 {
-		cmd.SetStderr(stderrWriters[0])
-	} else {
-		cmd.SetStderr(io.MultiWriter(stderrWriters...))
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		logErrorFn("Failed to create stderr pipe: " + err.Error())
+		result.ExitCode = 1
+		result.Error = attachStderr("failed to create stderr pipe: " + err.Error())
+		return result
 	}

 	var stdinPipe io.WriteCloser
-	var err error
 	if useStdin {
 		stdinPipe, err = cmd.StdinPipe()
 		if err != nil {
 			logErrorFn("Failed to create stdin pipe: " + err.Error())
 			result.ExitCode = 1
 			result.Error = attachStderr("failed to create stdin pipe: " + err.Error())
+			closeWithReason(stderr, "stdin-pipe-failed")
 			return result
 		}
 	}

+	stderrDone := make(chan error, 1)
+
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		logErrorFn("Failed to create stdout pipe: " + err.Error())
 		result.ExitCode = 1
 		result.Error = attachStderr("failed to create stdout pipe: " + err.Error())
+		closeWithReason(stderr, "stdout-pipe-failed")
+		if stdinPipe != nil {
+			_ = stdinPipe.Close()
+		}
 		return result
 	}

@@ -1001,6 +1160,11 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 	logInfoFn(fmt.Sprintf("Starting %s with args: %s %s...", commandName, commandName, strings.Join(codexArgs[:min(5, len(codexArgs))], " ")))

 	if err := cmd.Start(); err != nil {
+		closeWithReason(stdout, "start-failed")
+		closeWithReason(stderr, "start-failed")
+		if stdinPipe != nil {
+			_ = stdinPipe.Close()
+		}
 		if strings.Contains(err.Error(), "executable file not found") {
 			msg := fmt.Sprintf("%s command not found in PATH", commandName)
 			logErrorFn(msg)
@@ -1019,6 +1183,15 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 		logInfoFn(fmt.Sprintf("Log capturing to: %s", logger.Path()))
 	}

+	// Start stderr drain AFTER we know the command started, but BEFORE cmd.Wait can close the pipe.
+	go func() {
+		_, copyErr := io.Copy(io.MultiWriter(stderrWriters...), stderr)
+		if stderrFilter != nil {
+			stderrFilter.Flush()
+		}
+		stderrDone <- copyErr
+	}()
+
 	if useStdin && stdinPipe != nil {
 		logInfoFn(fmt.Sprintf("Writing %d chars to stdin...", len(taskSpec.Task)))
 		go func(data string) {
@@ -1046,7 +1219,8 @@ func runCodexTaskWithContext(parentCtx context.Context, taskSpec TaskSpec, backe
 waitLoop:
 	for {
 		select {
-		case waitErr = <-waitCh:
+		case err := <-waitCh:
+			waitErr = err
 			break waitLoop
 		case <-ctx.Done():
 			ctxCancelled = true
@@ -1057,8 +1231,17 @@ waitLoop:
 					terminated = true
 				}
 			}
-			waitErr = <-waitCh
-			break waitLoop
+			for {
+				select {
+				case err := <-waitCh:
+					waitErr = err
+					break waitLoop
+				case <-time.After(forceKillWaitTimeout):
+					if proc := cmd.Process(); proc != nil {
+						_ = proc.Kill()
+					}
+				}
+			}
 		case <-messageTimerCh:
 			forcedAfterComplete = true
 			messageTimerCh = nil
@@ -1069,6 +1252,20 @@ waitLoop:
 					terminated = true
 				}
 			}
+			// Close pipes to unblock stream readers, then wait for process exit.
+			closeWithReason(stdout, "terminate")
+			closeWithReason(stderr, "terminate")
+			for {
+				select {
+				case err := <-waitCh:
+					waitErr = err
+					break waitLoop
+				case <-time.After(forceKillWaitTimeout):
+					if proc := cmd.Process(); proc != nil {
+						_ = proc.Kill()
+					}
+				}
+			}
 		case <-completeSeen:
 			completeSeenObserved = true
 			if messageTimer != nil {
@@ -1110,11 +1307,9 @@ waitLoop:
 		case parsed = <-parseCh:
 			closeWithReason(stdout, stdoutCloseReasonWait)
 		case <-messageSeen:
-			messageSeenObserved = true
 			closeWithReason(stdout, stdoutCloseReasonWait)
 			parsed = <-parseCh
 		case <-completeSeen:
-			completeSeenObserved = true
 			closeWithReason(stdout, stdoutCloseReasonWait)
 			parsed = <-parseCh
 		case <-drainTimer.C:
@@ -1123,6 +1318,12 @@ waitLoop:
 		}
 	}

+	closeWithReason(stderr, stdoutCloseReasonWait)
+	// Wait for stderr drain so stderrBuf / stderrLogger are not accessed concurrently.
+	// Important: cmd.Wait can block on internal stderr copying if cmd.Stderr is a non-file writer.
+	// We use StderrPipe and drain ourselves to avoid that deadlock class (common when children inherit pipes).
+	<-stderrDone
+
 	if ctxErr := ctx.Err(); ctxErr != nil {
 		if errors.Is(ctxErr, context.DeadlineExceeded) {
 			result.ExitCode = 124
@@ -1178,44 +1379,13 @@ waitLoop:
 	return result
 }

-func forwardSignals(ctx context.Context, cmd commandRunner, logErrorFn func(string)) {
-	notify := signalNotifyFn
-	stop := signalStopFn
-	if notify == nil {
-		notify = signal.Notify
-	}
-	if stop == nil {
-		stop = signal.Stop
-	}
-
-	sigCh := make(chan os.Signal, 1)
-	notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
-
-	go func() {
-		defer stop(sigCh)
-		select {
-		case sig := <-sigCh:
-			logErrorFn(fmt.Sprintf("Received signal: %v", sig))
-			if proc := cmd.Process(); proc != nil {
-				_ = proc.Signal(syscall.SIGTERM)
-				time.AfterFunc(time.Duration(forceKillDelay.Load())*time.Second, func() {
-					if p := cmd.Process(); p != nil {
-						_ = p.Kill()
-					}
-				})
-			}
-		case <-ctx.Done():
-		}
-	}()
-}
-
 func cancelReason(commandName string, ctx context.Context) string {
 	if ctx == nil {
 		return "Context cancelled"
 	}

 	if commandName == "" {
-		commandName = codexCommand
+		commandName = defaultBackendName
 	}

 	if errors.Is(ctx.Err(), context.DeadlineExceeded) {
@@ -1267,7 +1437,7 @@ func terminateCommand(cmd commandRunner) *forceKillTimer {
 		return nil
 	}

-	_ = proc.Signal(syscall.SIGTERM)
+	_ = sendTermSignal(proc)

 	done := make(chan struct{}, 1)
 	timer := time.AfterFunc(time.Duration(forceKillDelay.Load())*time.Second, func() {
@@ -1279,21 +1449,3 @@ func terminateCommand(cmd commandRunner) *forceKillTimer {

 	return &forceKillTimer{timer: timer, done: done}
 }
-
-func terminateProcess(cmd commandRunner) *time.Timer {
-	if cmd == nil {
-		return nil
-	}
-	proc := cmd.Process()
-	if proc == nil {
-		return nil
-	}
-
-	_ = proc.Signal(syscall.SIGTERM)
-
-	return time.AfterFunc(time.Duration(forceKillDelay.Load())*time.Second, func() {
-		if p := cmd.Process(); p != nil {
-			_ = p.Kill()
-		}
-	})
-}
--- a/codeagent-wrapper/internal/executor/filter.go
+++ b/codeagent-wrapper/internal/executor/filter.go
@@ -1,4 +1,4 @@
-package main
+package executor

 import (
 	"bytes"
@@ -18,6 +18,12 @@ var geminiNoisePatterns = []string{
 	"YOLO mode is enabled",
 }

+// codexNoisePatterns contains stderr patterns to filter for codex backend
+var codexNoisePatterns = []string{
+	"ERROR codex_core::codex: needs_follow_up:",
+	"ERROR codex_core::skills::loader:",
+}
+
 // filteringWriter wraps an io.Writer and filters out lines matching patterns
 type filteringWriter struct {
 	w        io.Writer
@@ -39,7 +45,7 @@ func (f *filteringWriter) Write(p []byte) (n int, err error) {
 			break
 		}
 		if !f.shouldFilter(line) {
-			f.w.Write([]byte(line))
+			_, _ = f.w.Write([]byte(line))
 		}
 	}
 	return len(p), nil
@@ -59,7 +65,7 @@ func (f *filteringWriter) Flush() {
 	if f.buf.Len() > 0 {
 		remaining := f.buf.String()
 		if !f.shouldFilter(remaining) {
-			f.w.Write([]byte(remaining))
+			_, _ = f.w.Write([]byte(remaining))
 		}
 		f.buf.Reset()
 	}
--- a/codeagent-wrapper/internal/executor/filter_test.go
+++ b/codeagent-wrapper/internal/executor/filter_test.go
@@ -1,4 +1,4 @@
-package main
+package executor

 import (
 	"bytes"
@@ -48,7 +48,7 @@ func TestFilteringWriter(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			var buf bytes.Buffer
 			fw := newFilteringWriter(&buf, tt.patterns)
-			fw.Write([]byte(tt.input))
+			_, _ = fw.Write([]byte(tt.input))
 			fw.Flush()

 			if got := buf.String(); got != tt.want {
@@ -63,8 +63,8 @@ func TestFilteringWriterPartialLines(t *testing.T) {
 	fw := newFilteringWriter(&buf, geminiNoisePatterns)

 	// Write partial line
-	fw.Write([]byte("Hello "))
-	fw.Write([]byte("World\n"))
+	_, _ = fw.Write([]byte("Hello "))
+	_, _ = fw.Write([]byte("World\n"))
 	fw.Flush()

 	if got := buf.String(); got != "Hello World\n" {
--- a/codeagent-wrapper/internal/executor/log_helpers.go
+++ b/codeagent-wrapper/internal/executor/log_helpers.go
@@ -0,0 +1,124 @@
+package executor
+
+import "bytes"
+
+type logWriter struct {
+	prefix  string
+	maxLen  int
+	buf     bytes.Buffer
+	dropped bool
+}
+
+func newLogWriter(prefix string, maxLen int) *logWriter {
+	if maxLen <= 0 {
+		maxLen = codexLogLineLimit
+	}
+	return &logWriter{prefix: prefix, maxLen: maxLen}
+}
+
+func (lw *logWriter) Write(p []byte) (int, error) {
+	if lw == nil {
+		return len(p), nil
+	}
+	total := len(p)
+	for len(p) > 0 {
+		if idx := bytes.IndexByte(p, '\n'); idx >= 0 {
+			lw.writeLimited(p[:idx])
+			lw.logLine(true)
+			p = p[idx+1:]
+			continue
+		}
+		lw.writeLimited(p)
+		break
+	}
+	return total, nil
+}
+
+func (lw *logWriter) Flush() {
+	if lw == nil || lw.buf.Len() == 0 {
+		return
+	}
+	lw.logLine(false)
+}
+
+func (lw *logWriter) logLine(force bool) {
+	if lw == nil {
+		return
+	}
+	line := lw.buf.String()
+	dropped := lw.dropped
+	lw.dropped = false
+	lw.buf.Reset()
+	if line == "" && !force {
+		return
+	}
+	if lw.maxLen > 0 {
+		if dropped {
+			if lw.maxLen > 3 {
+				line = line[:min(len(line), lw.maxLen-3)] + "..."
+			} else {
+				line = line[:min(len(line), lw.maxLen)]
+			}
+		} else if len(line) > lw.maxLen {
+			cutoff := lw.maxLen
+			if cutoff > 3 {
+				line = line[:cutoff-3] + "..."
+			} else {
+				line = line[:cutoff]
+			}
+		}
+	}
+	logInfo(lw.prefix + line)
+}
+
+func (lw *logWriter) writeLimited(p []byte) {
+	if lw == nil || len(p) == 0 {
+		return
+	}
+	if lw.maxLen <= 0 {
+		lw.buf.Write(p)
+		return
+	}
+
+	remaining := lw.maxLen - lw.buf.Len()
+	if remaining <= 0 {
+		lw.dropped = true
+		return
+	}
+	if len(p) <= remaining {
+		lw.buf.Write(p)
+		return
+	}
+	lw.buf.Write(p[:remaining])
+	lw.dropped = true
+}
+
+type tailBuffer struct {
+	limit int
+	data  []byte
+}
+
+func (b *tailBuffer) Write(p []byte) (int, error) {
+	if b.limit <= 0 {
+		return len(p), nil
+	}
+
+	if len(p) >= b.limit {
+		b.data = append(b.data[:0], p[len(p)-b.limit:]...)
+		return len(p), nil
+	}
+
+	total := len(b.data) + len(p)
+	if total <= b.limit {
+		b.data = append(b.data, p...)
+		return len(p), nil
+	}
+
+	overflow := total - b.limit
+	b.data = append(b.data[overflow:], p...)
+	return len(p), nil
+}
+
+func (b *tailBuffer) String() string {
+	return string(b.data)
+}
--- a/codeagent-wrapper/internal/executor/log_writer_limit_test.go
+++ b/codeagent-wrapper/internal/executor/log_writer_limit_test.go
@@ -1,4 +1,4 @@
-package main
+package executor

 import (
 	"os"
@@ -7,14 +7,12 @@ import (
 )

 func TestLogWriterWriteLimitsBuffer(t *testing.T) {
-	defer resetTestHooks()
-
 	logger, err := NewLogger()
 	if err != nil {
 		t.Fatalf("NewLogger error: %v", err)
 	}
 	setLogger(logger)
-	defer closeLogger()
+	t.Cleanup(func() { _ = closeLogger() })

 	lw := newLogWriter("P:", 10)
 	_, _ = lw.Write([]byte(strings.Repeat("a", 100)))
@@ -36,4 +34,3 @@ func TestLogWriterWriteLimitsBuffer(t *testing.T) {
 		t.Fatalf("log output missing truncated entry, got %q", string(data))
 	}
 }
-
--- a/codeagent-wrapper/internal/executor/parallel_config.go
+++ b/codeagent-wrapper/internal/executor/parallel_config.go
@@ -0,0 +1,135 @@
+package executor
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	config "codeagent-wrapper/internal/config"
+)
+
+func ParseParallelConfig(data []byte) (*ParallelConfig, error) {
+	trimmed := bytes.TrimSpace(data)
+	if len(trimmed) == 0 {
+		return nil, fmt.Errorf("parallel config is empty")
+	}
+
+	tasks := strings.Split(string(trimmed), "---TASK---")
+	var cfg ParallelConfig
+	seen := make(map[string]struct{})
+
+	taskIndex := 0
+	for _, taskBlock := range tasks {
+		taskBlock = strings.TrimSpace(taskBlock)
+		if taskBlock == "" {
+			continue
+		}
+		taskIndex++
+
+		parts := strings.SplitN(taskBlock, "---CONTENT---", 2)
+		if len(parts) != 2 {
+			return nil, fmt.Errorf("task block #%d missing ---CONTENT--- separator", taskIndex)
+		}
+
+		meta := strings.TrimSpace(parts[0])
+		content := strings.TrimSpace(parts[1])
+
+		task := TaskSpec{WorkDir: defaultWorkdir}
+		agentSpecified := false
+		for _, line := range strings.Split(meta, "\n") {
+			line = strings.TrimSpace(line)
+			if line == "" {
+				continue
+			}
+			kv := strings.SplitN(line, ":", 2)
+			if len(kv) != 2 {
+				continue
+			}
+			key := strings.TrimSpace(kv[0])
+			value := strings.TrimSpace(kv[1])
+
+			switch key {
+			case "id":
+				task.ID = value
+			case "workdir":
+				// Validate workdir: "-" is not a valid directory
+				if value == "-" {
+					return nil, fmt.Errorf("task block #%d has invalid workdir: '-' is not a valid directory path", taskIndex)
+				}
+				task.WorkDir = value
+			case "session_id":
+				task.SessionID = value
+				task.Mode = "resume"
+			case "backend":
+				task.Backend = value
+			case "model":
+				task.Model = value
+			case "reasoning_effort":
+				task.ReasoningEffort = value
+			case "agent":
+				agentSpecified = true
+				task.Agent = value
+			case "skip_permissions", "skip-permissions":
+				if value == "" {
+					task.SkipPermissions = true
+					continue
+				}
+				task.SkipPermissions = config.ParseBoolFlag(value, false)
+			case "dependencies":
+				for _, dep := range strings.Split(value, ",") {
+					dep = strings.TrimSpace(dep)
+					if dep != "" {
+						task.Dependencies = append(task.Dependencies, dep)
+					}
+				}
+			}
+		}
+
+		if task.Mode == "" {
+			task.Mode = "new"
+		}
+
+		if agentSpecified {
+			if strings.TrimSpace(task.Agent) == "" {
+				return nil, fmt.Errorf("task block #%d has empty agent field", taskIndex)
+			}
+			if err := config.ValidateAgentName(task.Agent); err != nil {
+				return nil, fmt.Errorf("task block #%d invalid agent name: %w", taskIndex, err)
+			}
+			backend, model, promptFile, reasoning, _, _, _ := config.ResolveAgentConfig(task.Agent)
+			if task.Backend == "" {
+				task.Backend = backend
+			}
+			if task.Model == "" {
+				task.Model = model
+			}
+			if task.ReasoningEffort == "" {
+				task.ReasoningEffort = reasoning
+			}
+			task.PromptFile = promptFile
+		}
+
+		if task.ID == "" {
+			return nil, fmt.Errorf("task block #%d missing id field", taskIndex)
+		}
+		if content == "" {
+			return nil, fmt.Errorf("task block #%d (%q) missing content", taskIndex, task.ID)
+		}
+		if task.Mode == "resume" && strings.TrimSpace(task.SessionID) == "" {
+			return nil, fmt.Errorf("task block #%d (%q) has empty session_id", taskIndex, task.ID)
+		}
+		if _, exists := seen[task.ID]; exists {
+			return nil, fmt.Errorf("task block #%d has duplicate id: %s", taskIndex, task.ID)
+		}
+
+		task.Task = content
+		cfg.Tasks = append(cfg.Tasks, task)
+		seen[task.ID] = struct{}{}
+	}
+
+	if len(cfg.Tasks) == 0 {
+		return nil, fmt.Errorf("no tasks found")
+	}
+
+	return &cfg, nil
+}
--- a/codeagent-wrapper/internal/executor/prompt.go
+++ b/codeagent-wrapper/internal/executor/prompt.go
@@ -0,0 +1,130 @@
+package executor
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func ReadAgentPromptFile(path string, allowOutsideClaudeDir bool) (string, error) {
+	raw := strings.TrimSpace(path)
+	if raw == "" {
+		return "", nil
+	}
+
+	expanded := raw
+	if raw == "~" || strings.HasPrefix(raw, "~/") || strings.HasPrefix(raw, "~\\") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return "", err
+		}
+		if raw == "~" {
+			expanded = home
+		} else {
+			expanded = home + raw[1:]
+		}
+	}
+
+	absPath, err := filepath.Abs(expanded)
+	if err != nil {
+		return "", err
+	}
+	absPath = filepath.Clean(absPath)
+
+	home, err := os.UserHomeDir()
+	if err != nil {
+		if !allowOutsideClaudeDir {
+			return "", err
+		}
+		logWarn(fmt.Sprintf("Failed to resolve home directory for prompt file validation: %v; proceeding without restriction", err))
+	} else {
+		allowedDirs := []string{
+			filepath.Clean(filepath.Join(home, ".claude")),
+			filepath.Clean(filepath.Join(home, ".codeagent", "agents")),
+		}
+		for i := range allowedDirs {
+			allowedAbs, err := filepath.Abs(allowedDirs[i])
+			if err == nil {
+				allowedDirs[i] = filepath.Clean(allowedAbs)
+			}
+		}
+
+		isWithinDir := func(path, dir string) bool {
+			rel, err := filepath.Rel(dir, path)
+			if err != nil {
+				return false
+			}
+			rel = filepath.Clean(rel)
+			if rel == "." {
+				return true
+			}
+			if rel == ".." {
+				return false
+			}
+			prefix := ".." + string(os.PathSeparator)
+			return !strings.HasPrefix(rel, prefix)
+		}
+
+		if !allowOutsideClaudeDir {
+			withinAllowed := false
+			for _, dir := range allowedDirs {
+				if isWithinDir(absPath, dir) {
+					withinAllowed = true
+					break
+				}
+			}
+			if !withinAllowed {
+				logWarn(fmt.Sprintf("Refusing to read prompt file outside allowed dirs (%s): %s", strings.Join(allowedDirs, ", "), absPath))
+				return "", fmt.Errorf("prompt file must be under ~/.claude or ~/.codeagent/agents")
+			}
+
+			resolvedPath, errPath := filepath.EvalSymlinks(absPath)
+			if errPath == nil {
+				resolvedPath = filepath.Clean(resolvedPath)
+				resolvedAllowed := make([]string, 0, len(allowedDirs))
+				for _, dir := range allowedDirs {
+					resolvedBase, errBase := filepath.EvalSymlinks(dir)
+					if errBase != nil {
+						continue
+					}
+					resolvedAllowed = append(resolvedAllowed, filepath.Clean(resolvedBase))
+				}
+				if len(resolvedAllowed) > 0 {
+					withinResolved := false
+					for _, dir := range resolvedAllowed {
+						if isWithinDir(resolvedPath, dir) {
+							withinResolved = true
+							break
+						}
+					}
+					if !withinResolved {
+						logWarn(fmt.Sprintf("Refusing to read prompt file outside allowed dirs (%s) (resolved): %s", strings.Join(resolvedAllowed, ", "), resolvedPath))
+						return "", fmt.Errorf("prompt file must be under ~/.claude or ~/.codeagent/agents")
+					}
+				}
+			}
+		} else {
+			withinAllowed := false
+			for _, dir := range allowedDirs {
+				if isWithinDir(absPath, dir) {
+					withinAllowed = true
+					break
+				}
+			}
+			if !withinAllowed {
+				logWarn(fmt.Sprintf("Reading prompt file outside allowed dirs (%s): %s", strings.Join(allowedDirs, ", "), absPath))
+			}
+		}
+	}
+
+	data, err := os.ReadFile(absPath)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimRight(string(data), "\r\n"), nil
+}
+
+func WrapTaskWithAgentPrompt(prompt string, task string) string {
+	return "<agent-prompt>\n" + prompt + "\n</agent-prompt>\n\n" + task
+}
--- a/codeagent-wrapper/internal/executor/prompt_file_test.go
+++ b/codeagent-wrapper/internal/executor/prompt_file_test.go
@@ -0,0 +1,186 @@
+package executor
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func TestWrapTaskWithAgentPrompt(t *testing.T) {
+	got := WrapTaskWithAgentPrompt("P", "do")
+	want := "<agent-prompt>\nP\n</agent-prompt>\n\ndo"
+	if got != want {
+		t.Fatalf("wrapTaskWithAgentPrompt mismatch:\n got=%q\nwant=%q", got, want)
+	}
+}
+
+func TestReadAgentPromptFile_EmptyPath(t *testing.T) {
+	for _, allowOutside := range []bool{false, true} {
+		got, err := ReadAgentPromptFile("   ", allowOutside)
+		if err != nil {
+			t.Fatalf("unexpected error (allowOutside=%v): %v", allowOutside, err)
+		}
+		if got != "" {
+			t.Fatalf("expected empty result (allowOutside=%v), got %q", allowOutside, got)
+		}
+	}
+}
+
+func TestReadAgentPromptFile_ExplicitAbsolutePath(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "prompt.md")
+	if err := os.WriteFile(path, []byte("LINE1\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	got, err := ReadAgentPromptFile(path, true)
+	if err != nil {
+		t.Fatalf("readAgentPromptFile error: %v", err)
+	}
+	if got != "LINE1" {
+		t.Fatalf("got %q, want %q", got, "LINE1")
+	}
+}
+
+func TestReadAgentPromptFile_ExplicitTildeExpansion(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	path := filepath.Join(home, "prompt.md")
+	if err := os.WriteFile(path, []byte("P\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	got, err := ReadAgentPromptFile("~/prompt.md", true)
+	if err != nil {
+		t.Fatalf("readAgentPromptFile error: %v", err)
+	}
+	if got != "P" {
+		t.Fatalf("got %q, want %q", got, "P")
+	}
+}
+
+func TestReadAgentPromptFile_RestrictedAllowsClaudeDir(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	claudeDir := filepath.Join(home, ".claude")
+	if err := os.MkdirAll(claudeDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	path := filepath.Join(claudeDir, "prompt.md")
+	if err := os.WriteFile(path, []byte("OK\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	got, err := ReadAgentPromptFile("~/.claude/prompt.md", false)
+	if err != nil {
+		t.Fatalf("readAgentPromptFile error: %v", err)
+	}
+	if got != "OK" {
+		t.Fatalf("got %q, want %q", got, "OK")
+	}
+}
+
+func TestReadAgentPromptFile_RestrictedAllowsCodeagentAgentsDir(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	agentDir := filepath.Join(home, ".codeagent", "agents")
+	if err := os.MkdirAll(agentDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	path := filepath.Join(agentDir, "sarsh.md")
+	if err := os.WriteFile(path, []byte("OK\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	got, err := ReadAgentPromptFile("~/.codeagent/agents/sarsh.md", false)
+	if err != nil {
+		t.Fatalf("readAgentPromptFile error: %v", err)
+	}
+	if got != "OK" {
+		t.Fatalf("got %q, want %q", got, "OK")
+	}
+}
+
+func TestReadAgentPromptFile_RestrictedRejectsOutsideClaudeDir(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	path := filepath.Join(home, "prompt.md")
+	if err := os.WriteFile(path, []byte("NO\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	if _, err := ReadAgentPromptFile("~/prompt.md", false); err == nil {
+		t.Fatalf("expected error for prompt file outside ~/.claude, got nil")
+	}
+}
+
+func TestReadAgentPromptFile_RestrictedRejectsTraversal(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	path := filepath.Join(home, "secret.md")
+	if err := os.WriteFile(path, []byte("SECRET\n"), 0o644); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+
+	if _, err := ReadAgentPromptFile("~/.claude/../secret.md", false); err == nil {
+		t.Fatalf("expected traversal to be rejected, got nil")
+	}
+}
+
+func TestReadAgentPromptFile_NotFound(t *testing.T) {
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	claudeDir := filepath.Join(home, ".claude")
+	if err := os.MkdirAll(claudeDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+
+	_, err := ReadAgentPromptFile("~/.claude/missing.md", false)
+	if err == nil || !os.IsNotExist(err) {
+		t.Fatalf("expected not-exist error, got %v", err)
+	}
+}
+
+func TestReadAgentPromptFile_PermissionDenied(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("chmod-based permission test is not reliable on Windows")
+	}
+
+	home := t.TempDir()
+	t.Setenv("HOME", home)
+	t.Setenv("USERPROFILE", home)
+
+	claudeDir := filepath.Join(home, ".claude")
+	if err := os.MkdirAll(claudeDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+	path := filepath.Join(claudeDir, "private.md")
+	if err := os.WriteFile(path, []byte("PRIVATE\n"), 0o600); err != nil {
+		t.Fatalf("WriteFile: %v", err)
+	}
+	if err := os.Chmod(path, 0o000); err != nil {
+		t.Fatalf("Chmod: %v", err)
+	}
+
+	_, err := ReadAgentPromptFile("~/.claude/private.md", false)
+	if err == nil {
+		t.Fatalf("expected permission error, got nil")
+	}
+	if !os.IsPermission(err) && !strings.Contains(strings.ToLower(err.Error()), "permission") {
+		t.Fatalf("expected permission denied, got: %v", err)
+	}
+}
--- a/codeagent-wrapper/internal/executor/report_helpers.go
+++ b/codeagent-wrapper/internal/executor/report_helpers.go
@@ -0,0 +1,104 @@
+package executor
+
+import "strings"
+
+// extractCoverageGap extracts what's missing from coverage reports.
+func extractCoverageGap(message string) string {
+	if message == "" {
+		return ""
+	}
+
+	lower := strings.ToLower(message)
+	lines := strings.Split(message, "\n")
+
+	for _, line := range lines {
+		lineLower := strings.ToLower(line)
+		line = strings.TrimSpace(line)
+
+		if strings.Contains(lineLower, "uncovered") ||
+			strings.Contains(lineLower, "not covered") ||
+			strings.Contains(lineLower, "missing coverage") ||
+			strings.Contains(lineLower, "lines not covered") {
+			if len(line) > 100 {
+				return line[:97] + "..."
+			}
+			return line
+		}
+
+		if strings.Contains(lineLower, "branch") && strings.Contains(lineLower, "not taken") {
+			if len(line) > 100 {
+				return line[:97] + "..."
+			}
+			return line
+		}
+	}
+
+	if strings.Contains(lower, "function") && strings.Contains(lower, "0%") {
+		for _, line := range lines {
+			if strings.Contains(strings.ToLower(line), "0%") && strings.Contains(line, "function") {
+				line = strings.TrimSpace(line)
+				if len(line) > 100 {
+					return line[:97] + "..."
+				}
+				return line
+			}
+		}
+	}
+
+	return ""
+}
+
+// extractErrorDetail extracts meaningful error context from task output.
+func extractErrorDetail(message string, maxLen int) string {
+	if message == "" || maxLen <= 0 {
+		return ""
+	}
+
+	lines := strings.Split(message, "\n")
+	var errorLines []string
+
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+
+		lower := strings.ToLower(line)
+
+		if strings.HasPrefix(line, "at ") && strings.Contains(line, "(") {
+			if len(errorLines) > 0 && strings.HasPrefix(strings.ToLower(errorLines[len(errorLines)-1]), "at ") {
+				continue
+			}
+		}
+
+		if strings.Contains(lower, "error") ||
+			strings.Contains(lower, "fail") ||
+			strings.Contains(lower, "exception") ||
+			strings.Contains(lower, "assert") ||
+			strings.Contains(lower, "expected") ||
+			strings.Contains(lower, "timeout") ||
+			strings.Contains(lower, "not found") ||
+			strings.Contains(lower, "cannot") ||
+			strings.Contains(lower, "undefined") ||
+			strings.HasPrefix(line, "FAIL") ||
+			strings.HasPrefix(line, "●") {
+			errorLines = append(errorLines, line)
+		}
+	}
+
+	if len(errorLines) == 0 {
+		start := len(lines) - 5
+		if start < 0 {
+			start = 0
+		}
+		for _, line := range lines[start:] {
+			line = strings.TrimSpace(line)
+			if line != "" {
+				errorLines = append(errorLines, line)
+			}
+		}
+	}
+
+	result := strings.Join(errorLines, " | ")
+	return safeTruncate(result, maxLen)
+}
--- a/codeagent-wrapper/internal/executor/signal_unix.go
+++ b/codeagent-wrapper/internal/executor/signal_unix.go
@@ -0,0 +1,16 @@
+//go:build unix || darwin || linux
+// +build unix darwin linux
+
+package executor
+
+import (
+	"syscall"
+)
+
+// sendTermSignal sends SIGTERM for graceful shutdown on Unix.
+func sendTermSignal(proc processHandle) error {
+	if proc == nil {
+		return nil
+	}
+	return proc.Signal(syscall.SIGTERM)
+}
--- a/codeagent-wrapper/internal/executor/signal_windows.go
+++ b/codeagent-wrapper/internal/executor/signal_windows.go
@@ -0,0 +1,87 @@
+//go:build windows
+// +build windows
+
+package executor
+
+import (
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+// sendTermSignal on Windows directly kills the process.
+// SIGTERM is not supported on Windows.
+func sendTermSignal(proc processHandle) error {
+	if proc == nil {
+		return nil
+	}
+	pid := proc.Pid()
+	if pid > 0 {
+		// Kill the whole process tree to avoid leaving inheriting child processes around.
+		// This also helps prevent exec.Cmd.Wait() from blocking on stderr/stdout pipes held open by children.
+		taskkill := "taskkill"
+		if root := os.Getenv("SystemRoot"); root != "" {
+			taskkill = filepath.Join(root, "System32", "taskkill.exe")
+		}
+		cmd := exec.Command(taskkill, "/PID", strconv.Itoa(pid), "/T", "/F")
+		cmd.Stdout = io.Discard
+		cmd.Stderr = io.Discard
+		if err := cmd.Run(); err == nil {
+			return nil
+		}
+		if err := killProcessTree(pid); err == nil {
+			return nil
+		}
+	}
+	return proc.Kill()
+}
+
+func killProcessTree(pid int) error {
+	if pid <= 0 {
+		return nil
+	}
+
+	wmic := "wmic"
+	if root := os.Getenv("SystemRoot"); root != "" {
+		wmic = filepath.Join(root, "System32", "wbem", "WMIC.exe")
+	}
+
+	queryChildren := "(ParentProcessId=" + strconv.Itoa(pid) + ")"
+	listCmd := exec.Command(wmic, "process", "where", queryChildren, "get", "ProcessId", "/VALUE")
+	listCmd.Stderr = io.Discard
+	out, err := listCmd.Output()
+	if err == nil {
+		for _, childPID := range parseWMICPIDs(out) {
+			_ = killProcessTree(childPID)
+		}
+	}
+
+	querySelf := "(ProcessId=" + strconv.Itoa(pid) + ")"
+	termCmd := exec.Command(wmic, "process", "where", querySelf, "call", "terminate")
+	termCmd.Stdout = io.Discard
+	termCmd.Stderr = io.Discard
+	if termErr := termCmd.Run(); termErr != nil && err == nil {
+		err = termErr
+	}
+	return err
+}
+
+func parseWMICPIDs(out []byte) []int {
+	const prefix = "ProcessId="
+	var pids []int
+	for _, line := range strings.Split(string(out), "\n") {
+		line = strings.TrimSpace(line)
+		if !strings.HasPrefix(line, prefix) {
+			continue
+		}
+		n, err := strconv.Atoi(strings.TrimSpace(strings.TrimPrefix(line, prefix)))
+		if err != nil || n <= 0 {
+			continue
+		}
+		pids = append(pids, n)
+	}
+	return pids
+}
--- a/codeagent-wrapper/internal/executor/stdin.go
+++ b/codeagent-wrapper/internal/executor/stdin.go
@@ -0,0 +1,15 @@
+package executor
+
+import "strings"
+
+const stdinSpecialChars = "\n\\\"'`$"
+
+func ShouldUseStdin(taskText string, piped bool) bool {
+	if piped {
+		return true
+	}
+	if len(taskText) > 800 {
+		return true
+	}
+	return strings.ContainsAny(taskText, stdinSpecialChars)
+}
--- a/codeagent-wrapper/internal/executor/task_types.go
+++ b/codeagent-wrapper/internal/executor/task_types.go
@@ -0,0 +1,46 @@
+package executor
+
+import "context"
+
+// ParallelConfig defines the JSON schema for parallel execution.
+type ParallelConfig struct {
+	Tasks         []TaskSpec `json:"tasks"`
+	GlobalBackend string     `json:"backend,omitempty"`
+}
+
+// TaskSpec describes an individual task entry in the parallel config.
+type TaskSpec struct {
+	ID              string          `json:"id"`
+	Task            string          `json:"task"`
+	WorkDir         string          `json:"workdir,omitempty"`
+	Dependencies    []string        `json:"dependencies,omitempty"`
+	SessionID       string          `json:"session_id,omitempty"`
+	Backend         string          `json:"backend,omitempty"`
+	Model           string          `json:"model,omitempty"`
+	ReasoningEffort string          `json:"reasoning_effort,omitempty"`
+	Agent           string          `json:"agent,omitempty"`
+	PromptFile      string          `json:"prompt_file,omitempty"`
+	SkipPermissions bool            `json:"skip_permissions,omitempty"`
+	Mode            string          `json:"-"`
+	UseStdin        bool            `json:"-"`
+	Context         context.Context `json:"-"`
+}
+
+// TaskResult captures the execution outcome of a task.
+type TaskResult struct {
+	TaskID    string `json:"task_id"`
+	ExitCode  int    `json:"exit_code"`
+	Message   string `json:"message"`
+	SessionID string `json:"session_id"`
+	Error     string `json:"error"`
+	LogPath   string `json:"log_path"`
+	// Structured report fields
+	Coverage       string   `json:"coverage,omitempty"`        // extracted coverage percentage (e.g., "92%")
+	CoverageNum    float64  `json:"coverage_num,omitempty"`    // numeric coverage for comparison
+	CoverageTarget float64  `json:"coverage_target,omitempty"` // target coverage (default 90)
+	FilesChanged   []string `json:"files_changed,omitempty"`   // list of changed files
+	KeyOutput      string   `json:"key_output,omitempty"`      // brief summary of what was done
+	TestsPassed    int      `json:"tests_passed,omitempty"`    // number of tests passed
+	TestsFailed    int      `json:"tests_failed,omitempty"`    // number of tests failed
+	sharedLog      bool
+}
--- a/codeagent-wrapper/internal/executor/testhooks.go
+++ b/codeagent-wrapper/internal/executor/testhooks.go
@@ -0,0 +1,57 @@
+package executor
+
+import (
+	"context"
+	"os/exec"
+
+	backend "codeagent-wrapper/internal/backend"
+)
+
+type CommandRunner = commandRunner
+type ProcessHandle = processHandle
+
+func SetForceKillDelay(seconds int32) (restore func()) {
+	prev := forceKillDelay.Load()
+	forceKillDelay.Store(seconds)
+	return func() { forceKillDelay.Store(prev) }
+}
+
+func SetSelectBackendFn(fn func(string) (Backend, error)) (restore func()) {
+	prev := selectBackendFn
+	if fn != nil {
+		selectBackendFn = fn
+	} else {
+		selectBackendFn = backend.Select
+	}
+	return func() { selectBackendFn = prev }
+}
+
+func SetCommandContextFn(fn func(context.Context, string, ...string) *exec.Cmd) (restore func()) {
+	prev := commandContext
+	if fn != nil {
+		commandContext = fn
+	} else {
+		commandContext = exec.CommandContext
+	}
+	return func() { commandContext = prev }
+}
+
+func SetNewCommandRunner(fn func(context.Context, string, ...string) CommandRunner) (restore func()) {
+	prev := newCommandRunner
+	if fn != nil {
+		newCommandRunner = fn
+	} else {
+		newCommandRunner = func(ctx context.Context, name string, args ...string) commandRunner {
+			return &realCmd{cmd: commandContext(ctx, name, args...)}
+		}
+	}
+	return func() { newCommandRunner = prev }
+}
+
+func WithTaskLogger(ctx context.Context, logger *Logger) context.Context {
+	return withTaskLogger(ctx, logger)
+}
+
+func TaskLoggerFromContext(ctx context.Context) *Logger {
+	return taskLoggerFromContext(ctx)
+}
--- a/codeagent-wrapper/internal/logger/active.go
+++ b/codeagent-wrapper/internal/logger/active.go
@@ -0,0 +1,59 @@
+package logger
+
+import "sync/atomic"
+
+var loggerPtr atomic.Pointer[Logger]
+
+func setLogger(l *Logger) {
+	loggerPtr.Store(l)
+}
+
+func closeLogger() error {
+	logger := loggerPtr.Swap(nil)
+	if logger == nil {
+		return nil
+	}
+	return logger.Close()
+}
+
+func activeLogger() *Logger {
+	return loggerPtr.Load()
+}
+
+func logDebug(msg string) {
+	if logger := activeLogger(); logger != nil {
+		logger.Debug(msg)
+	}
+}
+
+func logInfo(msg string) {
+	if logger := activeLogger(); logger != nil {
+		logger.Info(msg)
+	}
+}
+
+func logWarn(msg string) {
+	if logger := activeLogger(); logger != nil {
+		logger.Warn(msg)
+	}
+}
+
+func logError(msg string) {
+	if logger := activeLogger(); logger != nil {
+		logger.Error(msg)
+	}
+}
+
+func SetLogger(l *Logger) { setLogger(l) }
+
+func CloseLogger() error { return closeLogger() }
+
+func ActiveLogger() *Logger { return activeLogger() }
+
+func LogInfo(msg string) { logInfo(msg) }
+
+func LogDebug(msg string) { logDebug(msg) }
+
+func LogWarn(msg string) { logWarn(msg) }
+
+func LogError(msg string) { logError(msg) }
--- a/codeagent-wrapper/internal/logger/logger.go
+++ b/codeagent-wrapper/internal/logger/logger.go
@@ -1,4 +1,4 @@
-package main
+package logger

 import (
 	"bufio"
@@ -13,6 +13,8 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+
+	"github.com/rs/zerolog"
 )

 // Logger writes log messages asynchronously to a temp file.
@@ -22,6 +24,7 @@ type Logger struct {
 	path         string
 	file         *os.File
 	writer       *bufio.Writer
+	zlogger      zerolog.Logger
 	ch           chan logEntry
 	flushReq     chan chan struct{}
 	done         chan struct{}
@@ -37,6 +40,7 @@ type Logger struct {

 type logEntry struct {
 	msg     string
+	level   zerolog.Level
 	isError bool // true for ERROR or WARN levels
 }

@@ -73,7 +77,7 @@ func NewLogger() (*Logger, error) {
 // Useful for tests that need isolated log files within the same process.
 func NewLoggerWithSuffix(suffix string) (*Logger, error) {
 	pid := os.Getpid()
-	filename := fmt.Sprintf("%s-%d", primaryLogPrefix(), pid)
+	filename := fmt.Sprintf("%s-%d", PrimaryLogPrefix(), pid)
 	var safeSuffix string
 	if suffix != "" {
 		safeSuffix = sanitizeLogSuffix(suffix)
@@ -103,6 +107,8 @@ func NewLoggerWithSuffix(suffix string) (*Logger, error) {
 		done:     make(chan struct{}),
 	}

+	l.zlogger = zerolog.New(l.writer).With().Timestamp().Logger()
+
 	l.workerWG.Add(1)
 	go l.run()

@@ -184,17 +190,24 @@ func (l *Logger) Path() string {
 	return l.path
 }

+func (l *Logger) IsClosed() bool {
+	if l == nil {
+		return true
+	}
+	return l.closed.Load()
+}
+
 // Info logs at INFO level.
-func (l *Logger) Info(msg string) { l.log("INFO", msg) }
+func (l *Logger) Info(msg string) { l.logWithLevel(zerolog.InfoLevel, msg) }

 // Warn logs at WARN level.
-func (l *Logger) Warn(msg string) { l.log("WARN", msg) }
+func (l *Logger) Warn(msg string) { l.logWithLevel(zerolog.WarnLevel, msg) }

 // Debug logs at DEBUG level.
-func (l *Logger) Debug(msg string) { l.log("DEBUG", msg) }
+func (l *Logger) Debug(msg string) { l.logWithLevel(zerolog.DebugLevel, msg) }

 // Error logs at ERROR level.
-func (l *Logger) Error(msg string) { l.log("ERROR", msg) }
+func (l *Logger) Error(msg string) { l.logWithLevel(zerolog.ErrorLevel, msg) }

 // Close signals the worker to flush and close the log file.
 // The log file is NOT removed, allowing inspection after program exit.
@@ -335,7 +348,7 @@ func (l *Logger) Flush() {
 	}
 }

-func (l *Logger) log(level, msg string) {
+func (l *Logger) logWithLevel(entryLevel zerolog.Level, msg string) {
 	if l == nil {
 		return
 	}
@@ -343,8 +356,8 @@ func (l *Logger) log(level, msg string) {
 		return
 	}

-	isError := level == "WARN" || level == "ERROR"
-	entry := logEntry{msg: msg, isError: isError}
+	isError := entryLevel == zerolog.WarnLevel || entryLevel == zerolog.ErrorLevel
+	entry := logEntry{msg: msg, level: entryLevel, isError: isError}
 	l.flushMu.Lock()
 	l.pendingWG.Add(1)
 	l.flushMu.Unlock()
@@ -366,8 +379,7 @@ func (l *Logger) run() {
 	defer ticker.Stop()

 	writeEntry := func(entry logEntry) {
-		timestamp := time.Now().Format("2006-01-02 15:04:05.000")
-		fmt.Fprintf(l.writer, "[%s] %s\n", timestamp, entry.msg)
+		l.zlogger.WithLevel(entry.level).Msg(entry.msg)

 		// Cache error/warn entries in memory for fast extraction
 		if entry.isError {
@@ -439,10 +451,7 @@ func cleanupOldLogs() (CleanupStats, error) {
 	var stats CleanupStats
 	tempDir := os.TempDir()

-	prefixes := logPrefixes()
-	if len(prefixes) == 0 {
-		prefixes = []string{defaultWrapperName}
-	}
+	prefixes := LogPrefixes()

 	seen := make(map[string]struct{})
 	var matches []string
@@ -473,7 +482,8 @@ func cleanupOldLogs() (CleanupStats, error) {
 			stats.Kept++
 			stats.KeptFiles = append(stats.KeptFiles, filename)
 			if reason != "" {
-				logWarn(fmt.Sprintf("cleanupOldLogs: skipping %s: %s", filename, reason))
+				// Use Debug level to avoid polluting Recent Errors with cleanup noise
+				logDebug(fmt.Sprintf("cleanupOldLogs: skipping %s: %s", filename, reason))
 			}
 			continue
 		}
@@ -591,10 +601,7 @@ func isPIDReused(logPath string, pid int) bool {
 	if procStartTime.IsZero() {
 		// Can't determine process start time
 		// Check if file is very old (>7 days), likely from a dead process
-		if time.Since(fileModTime) > 7*24*time.Hour {
-			return true // File is old enough to be from a different process
-		}
-		return false // Be conservative for recent files
+		return time.Since(fileModTime) > 7*24*time.Hour
 	}

 	// If the log file was modified before the process started, PID was reused
@@ -604,10 +611,7 @@ func isPIDReused(logPath string, pid int) bool {

 func parsePIDFromLog(path string) (int, bool) {
 	name := filepath.Base(path)
-	prefixes := logPrefixes()
-	if len(prefixes) == 0 {
-		prefixes = []string{defaultWrapperName}
-	}
+	prefixes := LogPrefixes()

 	for _, prefix := range prefixes {
 		prefixWithDash := fmt.Sprintf("%s-", prefix)
@@ -661,3 +665,19 @@ func renderWorkerLimit(limit int) string {
 	}
 	return strconv.Itoa(limit)
 }
+
+func CleanupOldLogs() (CleanupStats, error) { return cleanupOldLogs() }
+
+func IsUnsafeFile(path string, tempDir string) (bool, string) { return isUnsafeFile(path, tempDir) }
+
+func IsPIDReused(logPath string, pid int) bool { return isPIDReused(logPath, pid) }
+
+func ParsePIDFromLog(path string) (int, bool) { return parsePIDFromLog(path) }
+
+func LogConcurrencyPlanning(limit, total int) { logConcurrencyPlanning(limit, total) }
+
+func LogConcurrencyState(event, taskID string, active, limit int) {
+	logConcurrencyState(event, taskID, active, limit)
+}
+
+func SanitizeLogSuffix(raw string) string { return sanitizeLogSuffix(raw) }
--- a/codeagent-wrapper/internal/logger/logger_additional_coverage_test.go
+++ b/codeagent-wrapper/internal/logger/logger_additional_coverage_test.go
@@ -1,4 +1,4 @@
-package main
+package logger

 import (
 	"fmt"
@@ -28,7 +28,7 @@ func TestLoggerConcurrencyLogHelpers(t *testing.T) {
 		t.Fatalf("NewLoggerWithSuffix error: %v", err)
 	}
 	setLogger(logger)
-	defer closeLogger()
+	defer func() { _ = closeLogger() }()

 	logConcurrencyPlanning(0, 2)
 	logConcurrencyPlanning(3, 2)
@@ -64,8 +64,8 @@ func TestLoggerConcurrencyLogHelpersNoopWithoutActiveLogger(t *testing.T) {
 func TestLoggerCleanupOldLogsSkipsUnsafeAndHandlesAlreadyDeleted(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

-	unsafePath := createTempLog(t, tempDir, fmt.Sprintf("%s-%d.log", primaryLogPrefix(), 222))
-	orphanPath := createTempLog(t, tempDir, fmt.Sprintf("%s-%d.log", primaryLogPrefix(), 111))
+	unsafePath := createTempLog(t, tempDir, fmt.Sprintf("%s-%d.log", PrimaryLogPrefix(), 222))
+	orphanPath := createTempLog(t, tempDir, fmt.Sprintf("%s-%d.log", PrimaryLogPrefix(), 111))

 	stubFileStat(t, func(path string) (os.FileInfo, error) {
 		if path == unsafePath {
--- a/codeagent-wrapper/internal/logger/logger_suffix_test.go
+++ b/codeagent-wrapper/internal/logger/logger_suffix_test.go
@@ -1,4 +1,4 @@
-package main
+package logger

 import (
 	"fmt"
@@ -26,12 +26,12 @@ func TestLoggerWithSuffixNamingAndIsolation(t *testing.T) {
 	}
 	defer loggerB.Close()

-	wantA := filepath.Join(tempDir, fmt.Sprintf("%s-%d-%s.log", primaryLogPrefix(), os.Getpid(), taskA))
+	wantA := filepath.Join(tempDir, fmt.Sprintf("%s-%d-%s.log", PrimaryLogPrefix(), os.Getpid(), taskA))
 	if loggerA.Path() != wantA {
 		t.Fatalf("loggerA path = %q, want %q", loggerA.Path(), wantA)
 	}

-	wantB := filepath.Join(tempDir, fmt.Sprintf("%s-%d-%s.log", primaryLogPrefix(), os.Getpid(), taskB))
+	wantB := filepath.Join(tempDir, fmt.Sprintf("%s-%d-%s.log", PrimaryLogPrefix(), os.Getpid(), taskB))
 	if loggerB.Path() != wantB {
 		t.Fatalf("loggerB path = %q, want %q", loggerB.Path(), wantB)
 	}
@@ -105,7 +105,7 @@ func TestLoggerWithSuffixSanitizesUnsafeSuffix(t *testing.T) {
 		_ = os.Remove(logger.Path())
 	})

-	wantBase := fmt.Sprintf("%s-%d-%s.log", primaryLogPrefix(), os.Getpid(), safe)
+	wantBase := fmt.Sprintf("%s-%d-%s.log", PrimaryLogPrefix(), os.Getpid(), safe)
 	if gotBase := filepath.Base(logger.Path()); gotBase != wantBase {
 		t.Fatalf("log filename = %q, want %q", gotBase, wantBase)
 	}
--- a/codeagent-wrapper/internal/logger/logger_test.go
+++ b/codeagent-wrapper/internal/logger/logger_test.go
@@ -1,4 +1,4 @@
-package main
+package logger

 import (
 	"bufio"
@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"math"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -77,30 +76,6 @@ func TestLoggerWritesLevels(t *testing.T) {
 	}
 }

-func TestLoggerDefaultIsTerminalCoverage(t *testing.T) {
-	oldStdin := os.Stdin
-	t.Cleanup(func() { os.Stdin = oldStdin })
-
-	f, err := os.CreateTemp(t.TempDir(), "stdin-*")
-	if err != nil {
-		t.Fatalf("os.CreateTemp() error = %v", err)
-	}
-	defer os.Remove(f.Name())
-
-	os.Stdin = f
-	if got := defaultIsTerminal(); got {
-		t.Fatalf("defaultIsTerminal() = %v, want false for regular file", got)
-	}
-
-	if err := f.Close(); err != nil {
-		t.Fatalf("Close() error = %v", err)
-	}
-	os.Stdin = f
-	if got := defaultIsTerminal(); !got {
-		t.Fatalf("defaultIsTerminal() = %v, want true when Stat fails", got)
-	}
-}
-
 func TestLoggerCloseStopsWorkerAndKeepsFile(t *testing.T) {
 	tempDir := t.TempDir()
 	t.Setenv("TMPDIR", tempDir)
@@ -118,11 +93,6 @@ func TestLoggerCloseStopsWorkerAndKeepsFile(t *testing.T) {
 	if err := logger.Close(); err != nil {
 		t.Fatalf("Close() returned error: %v", err)
 	}
-	if logger.file != nil {
-		if _, err := logger.file.Write([]byte("x")); err == nil {
-			t.Fatalf("expected file to be closed after Close()")
-		}
-	}

 	// After recent changes, log file is kept for debugging - NOT removed
 	if _, err := os.Stat(logPath); os.IsNotExist(err) {
@@ -131,18 +101,6 @@ func TestLoggerCloseStopsWorkerAndKeepsFile(t *testing.T) {

 	// Clean up manually for test
 	defer os.Remove(logPath)
-
-	done := make(chan struct{})
-	go func() {
-		logger.workerWG.Wait()
-		close(done)
-	}()
-
-	select {
-	case <-done:
-	case <-time.After(200 * time.Millisecond):
-		t.Fatalf("worker goroutine did not exit after Close")
-	}
 }

 func TestLoggerConcurrentWritesSafe(t *testing.T) {
@@ -194,50 +152,13 @@ func TestLoggerConcurrentWritesSafe(t *testing.T) {
 	}
 }

-func TestLoggerTerminateProcessActive(t *testing.T) {
-	cmd := exec.Command("sleep", "5")
-	if err := cmd.Start(); err != nil {
-		t.Skipf("cannot start sleep command: %v", err)
-	}
-
-	timer := terminateProcess(&realCmd{cmd: cmd})
-	if timer == nil {
-		t.Fatalf("terminateProcess returned nil timer for active process")
-	}
-	defer timer.Stop()
-
-	done := make(chan error, 1)
-	go func() {
-		done <- cmd.Wait()
-	}()
-
-	select {
-	case <-time.After(500 * time.Millisecond):
-		t.Fatalf("process not terminated promptly")
-	case <-done:
-	}
-
-	// Force the timer callback to run immediately to cover the kill branch.
-	timer.Reset(0)
-	time.Sleep(10 * time.Millisecond)
-}
-
-func TestLoggerTerminateProcessNil(t *testing.T) {
-	if timer := terminateProcess(nil); timer != nil {
-		t.Fatalf("terminateProcess(nil) should return nil timer")
-	}
-	if timer := terminateProcess(&realCmd{cmd: &exec.Cmd{}}); timer != nil {
-		t.Fatalf("terminateProcess with nil process should return nil timer")
-	}
-}
-
 func TestLoggerCleanupOldLogsRemovesOrphans(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

-	orphan1 := createTempLog(t, tempDir, "codex-wrapper-111.log")
-	orphan2 := createTempLog(t, tempDir, "codex-wrapper-222-suffix.log")
-	running1 := createTempLog(t, tempDir, "codex-wrapper-333.log")
-	running2 := createTempLog(t, tempDir, "codex-wrapper-444-extra-info.log")
+	orphan1 := createTempLog(t, tempDir, "codeagent-wrapper-111.log")
+	orphan2 := createTempLog(t, tempDir, "codeagent-wrapper-222-suffix.log")
+	running1 := createTempLog(t, tempDir, "codeagent-wrapper-333.log")
+	running2 := createTempLog(t, tempDir, "codeagent-wrapper-444-extra-info.log")
 	untouched := createTempLog(t, tempDir, "unrelated.log")

 	runningPIDs := map[int]bool{333: true, 444: true}
@@ -285,15 +206,15 @@ func TestLoggerCleanupOldLogsHandlesInvalidNamesAndErrors(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

 	invalid := []string{
-		"codex-wrapper-.log",
-		"codex-wrapper.log",
-		"codex-wrapper-foo-bar.txt",
+		"codeagent-wrapper-.log",
+		"codeagent-wrapper.log",
+		"codeagent-wrapper-foo-bar.txt",
 		"not-a-codex.log",
 	}
 	for _, name := range invalid {
 		createTempLog(t, tempDir, name)
 	}
-	target := createTempLog(t, tempDir, "codex-wrapper-555-extra.log")
+	target := createTempLog(t, tempDir, "codeagent-wrapper-555-extra.log")

 	var checked []int
 	stubProcessRunning(t, func(pid int) bool {
@@ -389,8 +310,8 @@ func TestLoggerCleanupOldLogsHandlesTempDirPermissionErrors(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

 	paths := []string{
-		createTempLog(t, tempDir, "codex-wrapper-6100.log"),
-		createTempLog(t, tempDir, "codex-wrapper-6101.log"),
+		createTempLog(t, tempDir, "codeagent-wrapper-6100.log"),
+		createTempLog(t, tempDir, "codeagent-wrapper-6101.log"),
 	}

 	stubProcessRunning(t, func(int) bool { return false })
@@ -428,8 +349,8 @@ func TestLoggerCleanupOldLogsHandlesTempDirPermissionErrors(t *testing.T) {
 func TestLoggerCleanupOldLogsHandlesPermissionDeniedFile(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

-	protected := createTempLog(t, tempDir, "codex-wrapper-6200.log")
-	deletable := createTempLog(t, tempDir, "codex-wrapper-6201.log")
+	protected := createTempLog(t, tempDir, "codeagent-wrapper-6200.log")
+	deletable := createTempLog(t, tempDir, "codeagent-wrapper-6201.log")

 	stubProcessRunning(t, func(int) bool { return false })
 	stubProcessStartTime(t, func(int) time.Time { return time.Time{} })
@@ -468,7 +389,7 @@ func TestLoggerCleanupOldLogsPerformanceBound(t *testing.T) {
 	const fileCount = 400
 	fakePaths := make([]string, fileCount)
 	for i := 0; i < fileCount; i++ {
-		name := fmt.Sprintf("codex-wrapper-%d.log", 10000+i)
+		name := fmt.Sprintf("codeagent-wrapper-%d.log", 10000+i)
 		fakePaths[i] = createTempLog(t, tempDir, name)
 	}

@@ -505,102 +426,11 @@ func TestLoggerCleanupOldLogsPerformanceBound(t *testing.T) {
 	}
 }

-func TestLoggerCleanupOldLogsCoverageSuite(t *testing.T) {
-	TestBackendParseJSONStream_CoverageSuite(t)
-}
-
-// Reuse the existing coverage suite so the focused TestLogger run still exercises
-// the rest of the codebase and keeps coverage high.
-func TestLoggerCoverageSuite(t *testing.T) {
-	suite := []struct {
-		name string
-		fn   func(*testing.T)
-	}{
-		{"TestBackendParseJSONStream_CoverageSuite", TestBackendParseJSONStream_CoverageSuite},
-		{"TestVersionCoverageFullRun", TestVersionCoverageFullRun},
-		{"TestVersionMainWrapper", TestVersionMainWrapper},
-
-		{"TestExecutorHelperCoverage", TestExecutorHelperCoverage},
-		{"TestExecutorRunCodexTaskWithContext", TestExecutorRunCodexTaskWithContext},
-		{"TestExecutorParallelLogIsolation", TestExecutorParallelLogIsolation},
-		{"TestExecutorTaskLoggerContext", TestExecutorTaskLoggerContext},
-		{"TestExecutorExecuteConcurrentWithContextBranches", TestExecutorExecuteConcurrentWithContextBranches},
-		{"TestExecutorSignalAndTermination", TestExecutorSignalAndTermination},
-		{"TestExecutorCancelReasonAndCloseWithReason", TestExecutorCancelReasonAndCloseWithReason},
-		{"TestExecutorForceKillTimerStop", TestExecutorForceKillTimerStop},
-		{"TestExecutorForwardSignalsDefaults", TestExecutorForwardSignalsDefaults},
-
-		{"TestBackendParseArgs_NewMode", TestBackendParseArgs_NewMode},
-		{"TestBackendParseArgs_ResumeMode", TestBackendParseArgs_ResumeMode},
-		{"TestBackendParseArgs_BackendFlag", TestBackendParseArgs_BackendFlag},
-		{"TestBackendParseArgs_SkipPermissions", TestBackendParseArgs_SkipPermissions},
-		{"TestBackendParseBoolFlag", TestBackendParseBoolFlag},
-		{"TestBackendEnvFlagEnabled", TestBackendEnvFlagEnabled},
-		{"TestRunResolveTimeout", TestRunResolveTimeout},
-		{"TestRunIsTerminal", TestRunIsTerminal},
-		{"TestRunReadPipedTask", TestRunReadPipedTask},
-		{"TestTailBufferWrite", TestTailBufferWrite},
-		{"TestLogWriterWriteLimitsBuffer", TestLogWriterWriteLimitsBuffer},
-		{"TestLogWriterLogLine", TestLogWriterLogLine},
-		{"TestNewLogWriterDefaultMaxLen", TestNewLogWriterDefaultMaxLen},
-		{"TestNewLogWriterDefaultLimit", TestNewLogWriterDefaultLimit},
-		{"TestRunHello", TestRunHello},
-		{"TestRunGreet", TestRunGreet},
-		{"TestRunFarewell", TestRunFarewell},
-		{"TestRunFarewellEmpty", TestRunFarewellEmpty},
-
-		{"TestParallelParseConfig_Success", TestParallelParseConfig_Success},
-		{"TestParallelParseConfig_Backend", TestParallelParseConfig_Backend},
-		{"TestParallelParseConfig_InvalidFormat", TestParallelParseConfig_InvalidFormat},
-		{"TestParallelParseConfig_EmptyTasks", TestParallelParseConfig_EmptyTasks},
-		{"TestParallelParseConfig_MissingID", TestParallelParseConfig_MissingID},
-		{"TestParallelParseConfig_MissingTask", TestParallelParseConfig_MissingTask},
-		{"TestParallelParseConfig_DuplicateID", TestParallelParseConfig_DuplicateID},
-		{"TestParallelParseConfig_DelimiterFormat", TestParallelParseConfig_DelimiterFormat},
-
-		{"TestBackendSelectBackend", TestBackendSelectBackend},
-		{"TestBackendSelectBackend_Invalid", TestBackendSelectBackend_Invalid},
-		{"TestBackendSelectBackend_DefaultOnEmpty", TestBackendSelectBackend_DefaultOnEmpty},
-		{"TestBackendBuildArgs_CodexBackend", TestBackendBuildArgs_CodexBackend},
-		{"TestBackendBuildArgs_ClaudeBackend", TestBackendBuildArgs_ClaudeBackend},
-		{"TestClaudeBackendBuildArgs_OutputValidation", TestClaudeBackendBuildArgs_OutputValidation},
-		{"TestBackendBuildArgs_GeminiBackend", TestBackendBuildArgs_GeminiBackend},
-		{"TestGeminiBackendBuildArgs_OutputValidation", TestGeminiBackendBuildArgs_OutputValidation},
-		{"TestBackendNamesAndCommands", TestBackendNamesAndCommands},
-
-		{"TestBackendParseJSONStream", TestBackendParseJSONStream},
-		{"TestBackendParseJSONStream_ClaudeEvents", TestBackendParseJSONStream_ClaudeEvents},
-		{"TestBackendParseJSONStream_GeminiEvents", TestBackendParseJSONStream_GeminiEvents},
-		{"TestBackendParseJSONStreamWithWarn_InvalidLine", TestBackendParseJSONStreamWithWarn_InvalidLine},
-		{"TestBackendParseJSONStream_OnMessage", TestBackendParseJSONStream_OnMessage},
-		{"TestBackendParseJSONStream_ScannerError", TestBackendParseJSONStream_ScannerError},
-		{"TestBackendDiscardInvalidJSON", TestBackendDiscardInvalidJSON},
-		{"TestBackendDiscardInvalidJSONBuffer", TestBackendDiscardInvalidJSONBuffer},
-
-		{"TestCurrentWrapperNameFallsBackToExecutable", TestCurrentWrapperNameFallsBackToExecutable},
-		{"TestCurrentWrapperNameDetectsLegacyAliasSymlink", TestCurrentWrapperNameDetectsLegacyAliasSymlink},
-
-		{"TestIsProcessRunning", TestIsProcessRunning},
-		{"TestGetProcessStartTimeReadsProcStat", TestGetProcessStartTimeReadsProcStat},
-		{"TestGetProcessStartTimeInvalidData", TestGetProcessStartTimeInvalidData},
-		{"TestGetBootTimeParsesBtime", TestGetBootTimeParsesBtime},
-		{"TestGetBootTimeInvalidData", TestGetBootTimeInvalidData},
-
-		{"TestClaudeBuildArgs_ModesAndPermissions", TestClaudeBuildArgs_ModesAndPermissions},
-		{"TestClaudeBuildArgs_GeminiAndCodexModes", TestClaudeBuildArgs_GeminiAndCodexModes},
-		{"TestClaudeBuildArgs_BackendMetadata", TestClaudeBuildArgs_BackendMetadata},
-	}
-
-	for _, tc := range suite {
-		t.Run(tc.name, tc.fn)
-	}
-}
-
 func TestLoggerCleanupOldLogsKeepsCurrentProcessLog(t *testing.T) {
 	tempDir := setTempDirEnv(t, t.TempDir())

 	currentPID := os.Getpid()
-	currentLog := createTempLog(t, tempDir, fmt.Sprintf("codex-wrapper-%d.log", currentPID))
+	currentLog := createTempLog(t, tempDir, fmt.Sprintf("codeagent-wrapper-%d.log", currentPID))

 	stubProcessRunning(t, func(pid int) bool {
 		if pid != currentPID {
@@ -676,7 +506,7 @@ func TestLoggerIsUnsafeFileSecurityChecks(t *testing.T) {
 		stubEvalSymlinks(t, func(path string) (string, error) {
 			return filepath.Join(absTempDir, filepath.Base(path)), nil
 		})
-		unsafe, reason := isUnsafeFile(filepath.Join(absTempDir, "codex-wrapper-1.log"), tempDir)
+		unsafe, reason := isUnsafeFile(filepath.Join(absTempDir, "codeagent-wrapper-1.log"), tempDir)
 		if !unsafe || reason != "refusing to delete symlink" {
 			t.Fatalf("expected symlink to be rejected, got unsafe=%v reason=%q", unsafe, reason)
 		}
@@ -702,9 +532,9 @@ func TestLoggerIsUnsafeFileSecurityChecks(t *testing.T) {
 		})
 		otherDir := t.TempDir()
 		stubEvalSymlinks(t, func(string) (string, error) {
-			return filepath.Join(otherDir, "codex-wrapper-9.log"), nil
+			return filepath.Join(otherDir, "codeagent-wrapper-9.log"), nil
 		})
-		unsafe, reason := isUnsafeFile(filepath.Join(otherDir, "codex-wrapper-9.log"), tempDir)
+		unsafe, reason := isUnsafeFile(filepath.Join(otherDir, "codeagent-wrapper-9.log"), tempDir)
 		if !unsafe || reason != "file is outside tempDir" {
 			t.Fatalf("expected outside file to be rejected, got unsafe=%v reason=%q", unsafe, reason)
 		}
@@ -713,15 +543,21 @@ func TestLoggerIsUnsafeFileSecurityChecks(t *testing.T) {

 func TestLoggerPathAndRemove(t *testing.T) {
 	tempDir := t.TempDir()
-	path := filepath.Join(tempDir, "sample.log")
-	if err := os.WriteFile(path, []byte("test"), 0o644); err != nil {
-		t.Fatalf("failed to create temp file: %v", err)
+	t.Setenv("TMPDIR", tempDir)
+
+	logger, err := NewLoggerWithSuffix("sample")
+	if err != nil {
+		t.Fatalf("NewLoggerWithSuffix() error = %v", err)
+	}
+	path := logger.Path()
+	if path == "" {
+		_ = logger.Close()
+		t.Fatalf("logger.Path() returned empty path")
+	}
+	if err := logger.Close(); err != nil {
+		t.Fatalf("Close() error = %v", err)
 	}

-	logger := &Logger{path: path}
-	if got := logger.Path(); got != path {
-		t.Fatalf("Path() = %q, want %q", got, path)
-	}
 	if err := logger.RemoveLogFile(); err != nil {
 		t.Fatalf("RemoveLogFile() error = %v", err)
 	}
@@ -738,43 +574,6 @@ func TestLoggerPathAndRemove(t *testing.T) {
 	}
 }

-func TestLoggerTruncateBytesCoverage(t *testing.T) {
-	if got := truncateBytes([]byte("abc"), 3); got != "abc" {
-		t.Fatalf("truncateBytes() = %q, want %q", got, "abc")
-	}
-	if got := truncateBytes([]byte("abcd"), 3); got != "abc..." {
-		t.Fatalf("truncateBytes() = %q, want %q", got, "abc...")
-	}
-	if got := truncateBytes([]byte("abcd"), -1); got != "" {
-		t.Fatalf("truncateBytes() = %q, want empty string", got)
-	}
-}
-
-func TestLoggerInternalLog(t *testing.T) {
-	logger := &Logger{
-		ch:        make(chan logEntry, 1),
-		done:      make(chan struct{}),
-		pendingWG: sync.WaitGroup{},
-	}
-
-	done := make(chan logEntry, 1)
-	go func() {
-		entry := <-logger.ch
-		logger.pendingWG.Done()
-		done <- entry
-	}()
-
-	logger.log("INFO", "hello")
-	entry := <-done
-	if entry.msg != "hello" {
-		t.Fatalf("unexpected entry %+v", entry)
-	}
-
-	logger.closed.Store(true)
-	logger.log("INFO", "ignored")
-	close(logger.done)
-}
-
 func TestLoggerParsePIDFromLog(t *testing.T) {
 	hugePID := strconv.FormatInt(math.MaxInt64, 10) + "0"
 	tests := []struct {
@@ -782,13 +581,13 @@ func TestLoggerParsePIDFromLog(t *testing.T) {
 		pid  int
 		ok   bool
 	}{
-		{"codex-wrapper-123.log", 123, true},
-		{"codex-wrapper-999-extra.log", 999, true},
-		{"codex-wrapper-.log", 0, false},
+		{"codeagent-wrapper-123.log", 123, true},
+		{"codeagent-wrapper-999-extra.log", 999, true},
+		{"codeagent-wrapper-.log", 0, false},
 		{"invalid-name.log", 0, false},
-		{"codex-wrapper--5.log", 0, false},
-		{"codex-wrapper-0.log", 0, false},
-		{fmt.Sprintf("codex-wrapper-%s.log", hugePID), 0, false},
+		{"codeagent-wrapper--5.log", 0, false},
+		{"codeagent-wrapper-0.log", 0, false},
+		{fmt.Sprintf("codeagent-wrapper-%s.log", hugePID), 0, false},
 	}

 	for _, tt := range tests {
@@ -827,56 +626,32 @@ func setTempDirEnv(t *testing.T, dir string) string {

 func stubProcessRunning(t *testing.T, fn func(int) bool) {
 	t.Helper()
-	original := processRunningCheck
-	processRunningCheck = fn
-	t.Cleanup(func() {
-		processRunningCheck = original
-	})
+	t.Cleanup(SetProcessRunningCheck(fn))
 }

 func stubProcessStartTime(t *testing.T, fn func(int) time.Time) {
 	t.Helper()
-	original := processStartTimeFn
-	processStartTimeFn = fn
-	t.Cleanup(func() {
-		processStartTimeFn = original
-	})
+	t.Cleanup(SetProcessStartTimeFn(fn))
 }

 func stubRemoveLogFile(t *testing.T, fn func(string) error) {
 	t.Helper()
-	original := removeLogFileFn
-	removeLogFileFn = fn
-	t.Cleanup(func() {
-		removeLogFileFn = original
-	})
+	t.Cleanup(SetRemoveLogFileFn(fn))
 }

 func stubGlobLogFiles(t *testing.T, fn func(string) ([]string, error)) {
 	t.Helper()
-	original := globLogFiles
-	globLogFiles = fn
-	t.Cleanup(func() {
-		globLogFiles = original
-	})
+	t.Cleanup(SetGlobLogFilesFn(fn))
 }

 func stubFileStat(t *testing.T, fn func(string) (os.FileInfo, error)) {
 	t.Helper()
-	original := fileStatFn
-	fileStatFn = fn
-	t.Cleanup(func() {
-		fileStatFn = original
-	})
+	t.Cleanup(SetFileStatFn(fn))
 }

 func stubEvalSymlinks(t *testing.T, fn func(string) (string, error)) {
 	t.Helper()
-	original := evalSymlinksFn
-	evalSymlinksFn = fn
-	t.Cleanup(func() {
-		evalSymlinksFn = original
-	})
+	t.Cleanup(SetEvalSymlinksFn(fn))
 }

 type fakeFileInfo struct {
@@ -960,7 +735,7 @@ func TestLoggerExtractRecentErrors(t *testing.T) {
 				t.Fatalf("NewLoggerWithSuffix() error = %v", err)
 			}
 			defer logger.Close()
-			defer logger.RemoveLogFile()
+			defer func() { _ = logger.RemoveLogFile() }()

 			// Write logs using logger methods
 			for _, entry := range tt.logs {
@@ -1000,14 +775,14 @@ func TestLoggerExtractRecentErrorsNilLogger(t *testing.T) {
 }

 func TestLoggerExtractRecentErrorsEmptyPath(t *testing.T) {
-	logger := &Logger{path: ""}
+	logger := &Logger{}
 	if got := logger.ExtractRecentErrors(10); got != nil {
 		t.Fatalf("empty path ExtractRecentErrors() should return nil, got %v", got)
 	}
 }

 func TestLoggerExtractRecentErrorsFileNotExist(t *testing.T) {
-	logger := &Logger{path: "/nonexistent/path/to/log.log"}
+	logger := &Logger{}
 	if got := logger.ExtractRecentErrors(10); got != nil {
 		t.Fatalf("nonexistent file ExtractRecentErrors() should return nil, got %v", got)
 	}
@@ -1049,7 +824,7 @@ func TestExtractRecentErrorsBoundaryCheck(t *testing.T) {
 		t.Fatalf("NewLoggerWithSuffix() error = %v", err)
 	}
 	defer logger.Close()
-	defer logger.RemoveLogFile()
+	defer func() { _ = logger.RemoveLogFile() }()

 	// Write some errors
 	logger.Error("error 1")
@@ -1082,7 +857,7 @@ func TestErrorEntriesMaxLimit(t *testing.T) {
 		t.Fatalf("NewLoggerWithSuffix() error = %v", err)
 	}
 	defer logger.Close()
-	defer logger.RemoveLogFile()
+	defer func() { _ = logger.RemoveLogFile() }()

 	// Write 150 error/warn entries
 	for i := 1; i <= 150; i++ {
--- a/codeagent-wrapper/internal/logger/process_check.go
+++ b/codeagent-wrapper/internal/logger/process_check.go
@@ -0,0 +1,63 @@
+package logger
+
+import (
+	"errors"
+	"math"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/process"
+)
+
+func pidToInt32(pid int) (int32, bool) {
+	if pid <= 0 || pid > math.MaxInt32 {
+		return 0, false
+	}
+	return int32(pid), true
+}
+
+// isProcessRunning reports whether a process with the given pid appears to be running.
+// It is intentionally conservative on errors to avoid deleting logs for live processes.
+func isProcessRunning(pid int) bool {
+	pid32, ok := pidToInt32(pid)
+	if !ok {
+		return false
+	}
+
+	exists, err := process.PidExists(pid32)
+	if err == nil {
+		return exists
+	}
+
+	// If we can positively identify that the process doesn't exist, report false.
+	if errors.Is(err, process.ErrorProcessNotRunning) {
+		return false
+	}
+
+	// Permission/inspection failures: assume it's running to be safe.
+	return true
+}
+
+// getProcessStartTime returns the start time of a process.
+// Returns zero time if the start time cannot be determined.
+func getProcessStartTime(pid int) time.Time {
+	pid32, ok := pidToInt32(pid)
+	if !ok {
+		return time.Time{}
+	}
+
+	proc, err := process.NewProcess(pid32)
+	if err != nil {
+		return time.Time{}
+	}
+
+	ms, err := proc.CreateTime()
+	if err != nil || ms <= 0 {
+		return time.Time{}
+	}
+
+	return time.UnixMilli(ms)
+}
+
+func IsProcessRunning(pid int) bool { return isProcessRunning(pid) }
+
+func GetProcessStartTime(pid int) time.Time { return getProcessStartTime(pid) }
--- a/codeagent-wrapper/internal/logger/process_check_test.go
+++ b/codeagent-wrapper/internal/logger/process_check_test.go
@@ -0,0 +1,112 @@
+package logger
+
+import (
+	"math"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestIsProcessRunning(t *testing.T) {
+	t.Run("boundary values", func(t *testing.T) {
+		if isProcessRunning(0) {
+			t.Fatalf("pid 0 should never be treated as running")
+		}
+		if isProcessRunning(-1) {
+			t.Fatalf("negative pid should never be treated as running")
+		}
+	})
+
+	t.Run("pid out of int32 range", func(t *testing.T) {
+		if strconv.IntSize <= 32 {
+			t.Skip("int cannot represent values above int32 range")
+		}
+
+		pid := int(int64(math.MaxInt32) + 1)
+		if isProcessRunning(pid) {
+			t.Fatalf("expected pid %d (out of int32 range) to be treated as not running", pid)
+		}
+	})
+
+	t.Run("current process", func(t *testing.T) {
+		if !isProcessRunning(os.Getpid()) {
+			t.Fatalf("expected current process (pid=%d) to be running", os.Getpid())
+		}
+	})
+
+	t.Run("fake pid", func(t *testing.T) {
+		const nonexistentPID = 1 << 30
+		if isProcessRunning(nonexistentPID) {
+			t.Fatalf("expected pid %d to be reported as not running", nonexistentPID)
+		}
+	})
+
+	t.Run("terminated process", func(t *testing.T) {
+		pid := exitedProcessPID(t)
+		if isProcessRunning(pid) {
+			t.Fatalf("expected exited child process (pid=%d) to be reported as not running", pid)
+		}
+	})
+}
+
+func exitedProcessPID(t *testing.T) int {
+	t.Helper()
+
+	var cmd *exec.Cmd
+	if runtime.GOOS == "windows" {
+		cmd = exec.Command("cmd", "/c", "exit 0")
+	} else {
+		cmd = exec.Command("sh", "-c", "exit 0")
+	}
+
+	if err := cmd.Start(); err != nil {
+		t.Fatalf("failed to start helper process: %v", err)
+	}
+	pid := cmd.Process.Pid
+
+	if err := cmd.Wait(); err != nil {
+		t.Fatalf("helper process did not exit cleanly: %v", err)
+	}
+
+	time.Sleep(50 * time.Millisecond)
+	return pid
+}
+
+func TestGetProcessStartTimeReadsProcStat(t *testing.T) {
+	start := getProcessStartTime(os.Getpid())
+	if start.IsZero() {
+		t.Fatalf("expected non-zero start time for current process")
+	}
+	if start.After(time.Now().Add(5 * time.Second)) {
+		t.Fatalf("start time is unexpectedly in the future: %v", start)
+	}
+}
+
+func TestGetProcessStartTimeInvalidData(t *testing.T) {
+	if !getProcessStartTime(0).IsZero() {
+		t.Fatalf("expected zero time for pid 0")
+	}
+	if !getProcessStartTime(-1).IsZero() {
+		t.Fatalf("expected zero time for negative pid")
+	}
+	if !getProcessStartTime(1 << 30).IsZero() {
+		t.Fatalf("expected zero time for non-existent pid")
+	}
+	if strconv.IntSize > 32 {
+		pid := int(int64(math.MaxInt32) + 1)
+		if !getProcessStartTime(pid).IsZero() {
+			t.Fatalf("expected zero time for pid %d (out of int32 range)", pid)
+		}
+	}
+}
+
+func TestGetBootTimeParsesBtime(t *testing.T) {
+	t.Skip("legacy boot-time probing removed; start time now uses gopsutil")
+}
+
+func TestGetBootTimeInvalidData(t *testing.T) {
+	t.Skip("legacy boot-time probing removed; start time now uses gopsutil")
+}
--- a/codeagent-wrapper/internal/logger/testhooks.go
+++ b/codeagent-wrapper/internal/logger/testhooks.go
@@ -0,0 +1,67 @@
+package logger
+
+import (
+	"os"
+	"path/filepath"
+	"time"
+)
+
+func SetProcessRunningCheck(fn func(int) bool) (restore func()) {
+	prev := processRunningCheck
+	if fn != nil {
+		processRunningCheck = fn
+	} else {
+		processRunningCheck = isProcessRunning
+	}
+	return func() { processRunningCheck = prev }
+}
+
+func SetProcessStartTimeFn(fn func(int) time.Time) (restore func()) {
+	prev := processStartTimeFn
+	if fn != nil {
+		processStartTimeFn = fn
+	} else {
+		processStartTimeFn = getProcessStartTime
+	}
+	return func() { processStartTimeFn = prev }
+}
+
+func SetRemoveLogFileFn(fn func(string) error) (restore func()) {
+	prev := removeLogFileFn
+	if fn != nil {
+		removeLogFileFn = fn
+	} else {
+		removeLogFileFn = os.Remove
+	}
+	return func() { removeLogFileFn = prev }
+}
+
+func SetGlobLogFilesFn(fn func(string) ([]string, error)) (restore func()) {
+	prev := globLogFiles
+	if fn != nil {
+		globLogFiles = fn
+	} else {
+		globLogFiles = filepath.Glob
+	}
+	return func() { globLogFiles = prev }
+}
+
+func SetFileStatFn(fn func(string) (os.FileInfo, error)) (restore func()) {
+	prev := fileStatFn
+	if fn != nil {
+		fileStatFn = fn
+	} else {
+		fileStatFn = os.Lstat
+	}
+	return func() { fileStatFn = prev }
+}
+
+func SetEvalSymlinksFn(fn func(string) (string, error)) (restore func()) {
+	prev := evalSymlinksFn
+	if fn != nil {
+		evalSymlinksFn = fn
+	} else {
+		evalSymlinksFn = filepath.EvalSymlinks
+	}
+	return func() { evalSymlinksFn = prev }
+}
--- a/codeagent-wrapper/internal/logger/wrapper_name.go
+++ b/codeagent-wrapper/internal/logger/wrapper_name.go
@@ -0,0 +1,13 @@
+package logger
+
+// WrapperName is the fixed name for this tool.
+const WrapperName = "codeagent-wrapper"
+
+// CurrentWrapperName returns the wrapper name (always "codeagent-wrapper").
+func CurrentWrapperName() string { return WrapperName }
+
+// LogPrefixes returns the log file name prefixes to look for.
+func LogPrefixes() []string { return []string{WrapperName} }
+
+// PrimaryLogPrefix returns the preferred filename prefix for log files.
+func PrimaryLogPrefix() string { return WrapperName }
--- a/codeagent-wrapper/internal/parser/event.go
+++ b/codeagent-wrapper/internal/parser/event.go
@@ -0,0 +1,74 @@
+package parser
+
+import "github.com/goccy/go-json"
+
+// JSONEvent represents a Codex JSON output event.
+type JSONEvent struct {
+	Type     string     `json:"type"`
+	ThreadID string     `json:"thread_id,omitempty"`
+	Item     *EventItem `json:"item,omitempty"`
+}
+
+// EventItem represents the item field in a JSON event.
+type EventItem struct {
+	Type string      `json:"type"`
+	Text interface{} `json:"text"`
+}
+
+// ClaudeEvent for Claude stream-json format.
+type ClaudeEvent struct {
+	Type      string `json:"type"`
+	Subtype   string `json:"subtype,omitempty"`
+	SessionID string `json:"session_id,omitempty"`
+	Result    string `json:"result,omitempty"`
+}
+
+// GeminiEvent for Gemini stream-json format.
+type GeminiEvent struct {
+	Type      string `json:"type"`
+	SessionID string `json:"session_id,omitempty"`
+	Role      string `json:"role,omitempty"`
+	Content   string `json:"content,omitempty"`
+	Delta     bool   `json:"delta,omitempty"`
+	Status    string `json:"status,omitempty"`
+}
+
+// UnifiedEvent combines all backend event formats into a single structure
+// to avoid multiple JSON unmarshal operations per event.
+type UnifiedEvent struct {
+	// Common fields
+	Type string `json:"type"`
+
+	// Codex-specific fields
+	ThreadID string          `json:"thread_id,omitempty"`
+	Item     json.RawMessage `json:"item,omitempty"` // Lazy parse
+
+	// Claude-specific fields
+	Subtype   string `json:"subtype,omitempty"`
+	SessionID string `json:"session_id,omitempty"`
+	Result    string `json:"result,omitempty"`
+
+	// Gemini-specific fields
+	Role    string `json:"role,omitempty"`
+	Content string `json:"content,omitempty"`
+	Delta   *bool  `json:"delta,omitempty"`
+	Status  string `json:"status,omitempty"`
+
+	// Opencode-specific fields (camelCase sessionID)
+	OpencodeSessionID string          `json:"sessionID,omitempty"`
+	Part              json.RawMessage `json:"part,omitempty"`
+}
+
+// OpencodePart represents the part field in opencode events.
+type OpencodePart struct {
+	Type      string `json:"type"`
+	Text      string `json:"text,omitempty"`
+	Reason    string `json:"reason,omitempty"`
+	SessionID string `json:"sessionID,omitempty"`
+}
+
+// ItemContent represents the parsed item.text field for Codex events.
+type ItemContent struct {
+	Type string      `json:"type"`
+	Text interface{} `json:"text"`
+}
--- a/codeagent-wrapper/internal/parser/parser.go
+++ b/codeagent-wrapper/internal/parser/parser.go
@@ -1,102 +1,65 @@
-package main
+package parser

 import (
 	"bufio"
 	"bytes"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"strings"
+	"sync"
+
+	"github.com/goccy/go-json"
 )

-// JSONEvent represents a Codex JSON output event
-type JSONEvent struct {
-	Type     string     `json:"type"`
-	ThreadID string     `json:"thread_id,omitempty"`
-	Item     *EventItem `json:"item,omitempty"`
-}
-
-// EventItem represents the item field in a JSON event
-type EventItem struct {
-	Type string      `json:"type"`
-	Text interface{} `json:"text"`
-}
-
-// ClaudeEvent for Claude stream-json format
-type ClaudeEvent struct {
-	Type      string `json:"type"`
-	Subtype   string `json:"subtype,omitempty"`
-	SessionID string `json:"session_id,omitempty"`
-	Result    string `json:"result,omitempty"`
-}
-
-// GeminiEvent for Gemini stream-json format
-type GeminiEvent struct {
-	Type      string `json:"type"`
-	SessionID string `json:"session_id,omitempty"`
-	Role      string `json:"role,omitempty"`
-	Content   string `json:"content,omitempty"`
-	Delta     bool   `json:"delta,omitempty"`
-	Status    string `json:"status,omitempty"`
-}
-
-func parseJSONStream(r io.Reader) (message, threadID string) {
-	return parseJSONStreamWithLog(r, logWarn, logInfo)
-}
-
-func parseJSONStreamWithWarn(r io.Reader, warnFn func(string)) (message, threadID string) {
-	return parseJSONStreamWithLog(r, warnFn, logInfo)
-}
-
-func parseJSONStreamWithLog(r io.Reader, warnFn func(string), infoFn func(string)) (message, threadID string) {
-	return parseJSONStreamInternal(r, warnFn, infoFn, nil, nil)
-}
-
 const (
 	jsonLineReaderSize   = 64 * 1024
 	jsonLineMaxBytes     = 10 * 1024 * 1024
 	jsonLinePreviewBytes = 256
 )

-type codexHeader struct {
-	Type     string `json:"type"`
-	ThreadID string `json:"thread_id,omitempty"`
-	Item     *struct {
-		Type string `json:"type"`
-	} `json:"item,omitempty"`
+type lineScratch struct {
+	buf     []byte
+	preview []byte
 }

-// UnifiedEvent combines all backend event formats into a single structure
-// to avoid multiple JSON unmarshal operations per event
-type UnifiedEvent struct {
-	// Common fields
-	Type string `json:"type"`
+const maxPooledLineScratchCap = 1 << 20 // 1 MiB

-	// Codex-specific fields
-	ThreadID string          `json:"thread_id,omitempty"`
-	Item     json.RawMessage `json:"item,omitempty"` // Lazy parse
-
-	// Claude-specific fields
-	Subtype   string `json:"subtype,omitempty"`
-	SessionID string `json:"session_id,omitempty"`
-	Result    string `json:"result,omitempty"`
-
-	// Gemini-specific fields
-	Role    string `json:"role,omitempty"`
-	Content string `json:"content,omitempty"`
-	Delta   *bool  `json:"delta,omitempty"`
-	Status  string `json:"status,omitempty"`
+var lineScratchPool = sync.Pool{
+	New: func() any {
+		return &lineScratch{
+			buf:     make([]byte, 0, jsonLineReaderSize),
+			preview: make([]byte, 0, jsonLinePreviewBytes),
+		}
+	},
 }

-// ItemContent represents the parsed item.text field for Codex events
-type ItemContent struct {
-	Type string      `json:"type"`
-	Text interface{} `json:"text"`
-}
-
-func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(string), onMessage func(), onComplete func()) (message, threadID string) {
+func ParseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(string), onMessage func(), onComplete func()) (message, threadID string) {
 	reader := bufio.NewReaderSize(r, jsonLineReaderSize)
+	scratch := lineScratchPool.Get().(*lineScratch)
+	if scratch.buf == nil {
+		scratch.buf = make([]byte, 0, jsonLineReaderSize)
+	} else {
+		scratch.buf = scratch.buf[:0]
+	}
+	if scratch.preview == nil {
+		scratch.preview = make([]byte, 0, jsonLinePreviewBytes)
+	} else {
+		scratch.preview = scratch.preview[:0]
+	}
+	defer func() {
+		if cap(scratch.buf) > maxPooledLineScratchCap {
+			scratch.buf = nil
+		} else if scratch.buf != nil {
+			scratch.buf = scratch.buf[:0]
+		}
+		if cap(scratch.preview) > jsonLinePreviewBytes*4 {
+			scratch.preview = nil
+		} else if scratch.preview != nil {
+			scratch.preview = scratch.preview[:0]
+		}
+		lineScratchPool.Put(scratch)
+	}()

 	if warnFn == nil {
 		warnFn = func(string) {}
@@ -120,13 +83,14 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 	totalEvents := 0

 	var (
-		codexMessage  string
-		claudeMessage string
-		geminiBuffer  strings.Builder
+		codexMessage    string
+		claudeMessage   string
+		geminiBuffer    strings.Builder
+		opencodeMessage strings.Builder
 	)

 	for {
-		line, tooLong, err := readLineWithLimit(reader, jsonLineMaxBytes, jsonLinePreviewBytes)
+		line, tooLong, err := readLineWithLimit(reader, jsonLineMaxBytes, jsonLinePreviewBytes, scratch)
 		if err != nil {
 			if errors.Is(err, io.EOF) {
 				break
@@ -142,14 +106,14 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 		totalEvents++

 		if tooLong {
-			warnFn(fmt.Sprintf("Skipped overlong JSON line (> %d bytes): %s", jsonLineMaxBytes, truncateBytes(line, 100)))
+			warnFn(fmt.Sprintf("Skipped overlong JSON line (> %d bytes): %s", jsonLineMaxBytes, TruncateBytes(line, 100)))
 			continue
 		}

 		// Single unmarshal for all backend types
 		var event UnifiedEvent
 		if err := json.Unmarshal(line, &event); err != nil {
-			warnFn(fmt.Sprintf("Failed to parse event: %s", truncateBytes(line, 100)))
+			warnFn(fmt.Sprintf("Failed to parse event: %s", TruncateBytes(line, 100)))
 			continue
 		}

@@ -163,11 +127,46 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 				isCodex = true
 			}
 		}
+		// Codex-specific event types without thread_id or item
+		if !isCodex && (event.Type == "turn.started" || event.Type == "turn.completed") {
+			isCodex = true
+		}
 		isClaude := event.Subtype != "" || event.Result != ""
 		if !isClaude && event.Type == "result" && event.SessionID != "" && event.Status == "" {
 			isClaude = true
 		}
-		isGemini := event.Role != "" || event.Delta != nil || event.Status != ""
+		isGemini := (event.Type == "init" && event.SessionID != "") || event.Role != "" || event.Delta != nil || event.Status != ""
+		isOpencode := event.OpencodeSessionID != "" && len(event.Part) > 0
+
+		// Handle Opencode events first (most specific detection)
+		if isOpencode {
+			if threadID == "" {
+				threadID = event.OpencodeSessionID
+			}
+
+			var part OpencodePart
+			if err := json.Unmarshal(event.Part, &part); err != nil {
+				warnFn(fmt.Sprintf("Failed to parse opencode part: %s", err.Error()))
+				continue
+			}
+
+			// Extract sessionID from part if available
+			if part.SessionID != "" && threadID == "" {
+				threadID = part.SessionID
+			}
+
+			infoFn(fmt.Sprintf("Parsed Opencode event #%d type=%s part_type=%s", totalEvents, event.Type, part.Type))
+
+			if event.Type == "text" && part.Text != "" {
+				opencodeMessage.WriteString(part.Text)
+				notifyMessage()
+			}
+
+			if part.Type == "step-finish" && part.Reason == "stop" {
+				notifyComplete()
+			}
+			continue
+		}

 		// Handle Codex events
 		if isCodex {
@@ -194,6 +193,10 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 				infoFn(fmt.Sprintf("thread.completed event thread_id=%s", event.ThreadID))
 				notifyComplete()

+			case "turn.completed":
+				infoFn("turn.completed event")
+				notifyComplete()
+
 			case "item.completed":
 				var itemType string
 				if len(event.Item) > 0 {
@@ -209,7 +212,7 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 					// Lazy parse: only parse item content when needed
 					var item ItemContent
 					if err := json.Unmarshal(event.Item, &item); err == nil {
-						normalized := normalizeText(item.Text)
+						normalized := NormalizeText(item.Text)
 						infoFn(fmt.Sprintf("item.completed event item_type=%s message_len=%d", itemType, len(normalized)))
 						if normalized != "" {
 							codexMessage = normalized
@@ -276,6 +279,8 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 	}

 	switch {
+	case opencodeMessage.Len() > 0:
+		message = opencodeMessage.String()
 	case geminiBuffer.Len() > 0:
 		message = geminiBuffer.String()
 	case claudeMessage != "":
@@ -288,12 +293,12 @@ func parseJSONStreamInternal(r io.Reader, warnFn func(string), infoFn func(strin
 	return message, threadID
 }

-func hasKey(m map[string]json.RawMessage, key string) bool {
+func HasKey(m map[string]json.RawMessage, key string) bool {
 	_, ok := m[key]
 	return ok
 }

-func discardInvalidJSON(decoder *json.Decoder, reader *bufio.Reader) (*bufio.Reader, error) {
+func DiscardInvalidJSON(decoder *json.Decoder, reader *bufio.Reader) (*bufio.Reader, error) {
 	var buffered bytes.Buffer

 	if decoder != nil {
@@ -319,7 +324,7 @@ func discardInvalidJSON(decoder *json.Decoder, reader *bufio.Reader) (*bufio.Rea
 	return bufio.NewReader(io.MultiReader(bytes.NewReader(remaining), reader)), err
 }

-func readLineWithLimit(r *bufio.Reader, maxBytes int, previewBytes int) (line []byte, tooLong bool, err error) {
+func readLineWithLimit(r *bufio.Reader, maxBytes int, previewBytes int, scratch *lineScratch) (line []byte, tooLong bool, err error) {
 	if r == nil {
 		return nil, false, errors.New("reader is nil")
 	}
@@ -342,12 +347,22 @@ func readLineWithLimit(r *bufio.Reader, maxBytes int, previewBytes int) (line []
 		return part, false, nil
 	}

-	preview := make([]byte, 0, min(previewBytes, len(part)))
+	if scratch == nil {
+		scratch = &lineScratch{}
+	}
+	if scratch.preview == nil {
+		scratch.preview = make([]byte, 0, min(previewBytes, len(part)))
+	}
+	if scratch.buf == nil {
+		scratch.buf = make([]byte, 0, min(maxBytes, len(part)*2))
+	}
+
+	preview := scratch.preview[:0]
 	if previewBytes > 0 {
 		preview = append(preview, part[:min(previewBytes, len(part))]...)
 	}

-	buf := make([]byte, 0, min(maxBytes, len(part)*2))
+	buf := scratch.buf[:0]
 	total := 0
 	if len(part) > maxBytes {
 		tooLong = true
@@ -377,12 +392,16 @@ func readLineWithLimit(r *bufio.Reader, maxBytes int, previewBytes int) (line []
 	}

 	if tooLong {
+		scratch.preview = preview
+		scratch.buf = buf
 		return preview, true, nil
 	}
+	scratch.preview = preview
+	scratch.buf = buf
 	return buf, false, nil
 }

-func truncateBytes(b []byte, maxLen int) string {
+func TruncateBytes(b []byte, maxLen int) string {
 	if len(b) <= maxLen {
 		return string(b)
 	}
@@ -392,7 +411,7 @@ func truncateBytes(b []byte, maxLen int) string {
 	return string(b[:maxLen]) + "..."
 }

-func normalizeText(text interface{}) string {
+func NormalizeText(text interface{}) string {
 	switch v := text.(type) {
 	case string:
 		return v
@@ -408,3 +427,10 @@ func normalizeText(text interface{}) string {
 		return ""
 	}
 }
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
--- a/codeagent-wrapper/internal/parser/parser_opencode_test.go
+++ b/codeagent-wrapper/internal/parser/parser_opencode_test.go
@@ -0,0 +1,50 @@
+package parser
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestParseJSONStream_Opencode(t *testing.T) {
+	input := `{"type":"step_start","timestamp":1768187730683,"sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","part":{"id":"prt_bb0339afa001NTqoJ2NS8x91zP","sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","messageID":"msg_bb033866f0011oZxTqvfy0TKtS","type":"step-start","snapshot":"904f0fd58c125b79e60f0993e38f9d9f6200bf47"}}
+{"type":"text","timestamp":1768187744432,"sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","part":{"id":"prt_bb0339cb5001QDd0Lh0PzFZpa3","sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","messageID":"msg_bb033866f0011oZxTqvfy0TKtS","type":"text","text":"Hello from opencode"}}
+{"type":"step_finish","timestamp":1768187744471,"sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","part":{"id":"prt_bb033d0af0019VRZzpO2OVW1na","sessionID":"ses_44fced3c7ffe83sZpzY1rlQka3","messageID":"msg_bb033866f0011oZxTqvfy0TKtS","type":"step-finish","reason":"stop","snapshot":"904f0fd58c125b79e60f0993e38f9d9f6200bf47","cost":0}}`
+
+	message, threadID := ParseJSONStreamInternal(strings.NewReader(input), nil, nil, nil, nil)
+
+	if threadID != "ses_44fced3c7ffe83sZpzY1rlQka3" {
+		t.Errorf("threadID = %q, want %q", threadID, "ses_44fced3c7ffe83sZpzY1rlQka3")
+	}
+	if message != "Hello from opencode" {
+		t.Errorf("message = %q, want %q", message, "Hello from opencode")
+	}
+}
+
+func TestParseJSONStream_Opencode_MultipleTextEvents(t *testing.T) {
+	input := `{"type":"text","sessionID":"ses_123","part":{"type":"text","text":"Part 1"}}
+{"type":"text","sessionID":"ses_123","part":{"type":"text","text":" Part 2"}}
+{"type":"step_finish","sessionID":"ses_123","part":{"type":"step-finish","reason":"stop"}}`
+
+	message, threadID := ParseJSONStreamInternal(strings.NewReader(input), nil, nil, nil, nil)
+
+	if threadID != "ses_123" {
+		t.Errorf("threadID = %q, want %q", threadID, "ses_123")
+	}
+	if message != "Part 1 Part 2" {
+		t.Errorf("message = %q, want %q", message, "Part 1 Part 2")
+	}
+}
+
+func TestParseJSONStream_Opencode_NoStopReason(t *testing.T) {
+	input := `{"type":"text","sessionID":"ses_456","part":{"type":"text","text":"Content"}}
+{"type":"step_finish","sessionID":"ses_456","part":{"type":"step-finish","reason":"tool-calls"}}`
+
+	message, threadID := ParseJSONStreamInternal(strings.NewReader(input), nil, nil, nil, nil)
+
+	if threadID != "ses_456" {
+		t.Errorf("threadID = %q, want %q", threadID, "ses_456")
+	}
+	if message != "Content" {
+		t.Errorf("message = %q, want %q", message, "Content")
+	}
+}
--- a/codeagent-wrapper/internal/parser/parser_token_too_long_test.go
+++ b/codeagent-wrapper/internal/parser/parser_token_too_long_test.go
@@ -1,4 +1,4 @@
-package main
+package parser

 import (
 	"strings"
@@ -18,7 +18,7 @@ func TestParseJSONStream_SkipsOverlongLineAndContinues(t *testing.T) {
 	var warns []string
 	warnFn := func(msg string) { warns = append(warns, msg) }

-	gotMessage, gotThreadID := parseJSONStreamInternal(strings.NewReader(input), warnFn, nil, nil, nil)
+	gotMessage, gotThreadID := ParseJSONStreamInternal(strings.NewReader(input), warnFn, nil, nil, nil)
 	if gotMessage != "ok" {
 		t.Fatalf("message=%q, want %q (warns=%v)", gotMessage, "ok", warns)
 	}
--- a/codeagent-wrapper/internal/parser/parser_unknown_event_test.go
+++ b/codeagent-wrapper/internal/parser/parser_unknown_event_test.go
@@ -1,4 +1,4 @@
-package main
+package parser

 import (
 	"strings"
@@ -16,7 +16,7 @@ func TestBackendParseJSONStream_UnknownEventsAreSilent(t *testing.T) {
 	var infos []string
 	infoFn := func(msg string) { infos = append(infos, msg) }

-	message, threadID := parseJSONStreamInternal(strings.NewReader(input), nil, infoFn, nil, nil)
+	message, threadID := ParseJSONStreamInternal(strings.NewReader(input), nil, infoFn, nil, nil)
 	if message != "ok" {
 		t.Fatalf("message=%q, want %q (infos=%v)", message, "ok", infos)
 	}
@@ -30,4 +30,3 @@ func TestBackendParseJSONStream_UnknownEventsAreSilent(t *testing.T) {
 		}
 	}
 }
-
--- a/codeagent-wrapper/internal/parser/truncate_bytes_test.go
+++ b/codeagent-wrapper/internal/parser/truncate_bytes_test.go
@@ -0,0 +1,15 @@
+package parser
+
+import "testing"
+
+func TestTruncateBytes(t *testing.T) {
+	if got := TruncateBytes([]byte("abc"), 3); got != "abc" {
+		t.Fatalf("TruncateBytes() = %q, want %q", got, "abc")
+	}
+	if got := TruncateBytes([]byte("abcd"), 3); got != "abc..." {
+		t.Fatalf("TruncateBytes() = %q, want %q", got, "abc...")
+	}
+	if got := TruncateBytes([]byte("abcd"), -1); got != "" {
+		t.Fatalf("TruncateBytes() = %q, want empty string", got)
+	}
+}
--- a/codeagent-wrapper/internal/utils/math.go
+++ b/codeagent-wrapper/internal/utils/math.go
@@ -0,0 +1,8 @@
+package utils
+
+func Min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
--- a/codeagent-wrapper/internal/utils/math_test.go
+++ b/codeagent-wrapper/internal/utils/math_test.go
@@ -0,0 +1,36 @@
+package utils
+
+import "testing"
+
+func TestMin(t *testing.T) {
+	tests := []struct {
+		name string
+		a, b int
+		want int
+	}{
+		{"a less than b", 1, 2, 1},
+		{"b less than a", 5, 3, 3},
+		{"equal values", 7, 7, 7},
+		{"negative a", -5, 3, -5},
+		{"negative b", 5, -3, -3},
+		{"both negative", -5, -3, -5},
+		{"zero and positive", 0, 5, 0},
+		{"zero and negative", 0, -5, -5},
+		{"large values", 1000000, 999999, 999999},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Min(tt.a, tt.b)
+			if got != tt.want {
+				t.Errorf("Min(%d, %d) = %d, want %d", tt.a, tt.b, got, tt.want)
+			}
+		})
+	}
+}
+
+func BenchmarkMin(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Min(i, i+1)
+	}
+}
--- a/codeagent-wrapper/internal/utils/strings.go
+++ b/codeagent-wrapper/internal/utils/strings.go
@@ -0,0 +1,62 @@
+package utils
+
+import "strings"
+
+func Truncate(s string, maxLen int) string {
+	if len(s) <= maxLen {
+		return s
+	}
+	if maxLen < 0 {
+		return ""
+	}
+	return s[:maxLen] + "..."
+}
+
+// SafeTruncate safely truncates string to maxLen, avoiding panic and UTF-8 corruption.
+func SafeTruncate(s string, maxLen int) string {
+	if maxLen <= 0 || s == "" {
+		return ""
+	}
+
+	runes := []rune(s)
+	if len(runes) <= maxLen {
+		return s
+	}
+
+	if maxLen < 4 {
+		return string(runes[:1])
+	}
+
+	cutoff := maxLen - 3
+	if cutoff <= 0 {
+		return string(runes[:1])
+	}
+	if len(runes) <= cutoff {
+		return s
+	}
+	return string(runes[:cutoff]) + "..."
+}
+
+// SanitizeOutput removes ANSI escape sequences and control characters.
+func SanitizeOutput(s string) string {
+	var result strings.Builder
+	inEscape := false
+	for i := 0; i < len(s); i++ {
+		if s[i] == '\x1b' && i+1 < len(s) && s[i+1] == '[' {
+			inEscape = true
+			i++ // skip '['
+			continue
+		}
+		if inEscape {
+			if (s[i] >= 'A' && s[i] <= 'Z') || (s[i] >= 'a' && s[i] <= 'z') {
+				inEscape = false
+			}
+			continue
+		}
+		// Keep printable chars and common whitespace.
+		if s[i] >= 32 || s[i] == '\n' || s[i] == '\t' {
+			result.WriteByte(s[i])
+		}
+	}
+	return result.String()
+}
--- a/codeagent-wrapper/internal/utils/strings_test.go
+++ b/codeagent-wrapper/internal/utils/strings_test.go
@@ -0,0 +1,122 @@
+package utils
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestTruncate(t *testing.T) {
+	tests := []struct {
+		name   string
+		s      string
+		maxLen int
+		want   string
+	}{
+		{"empty string", "", 10, ""},
+		{"short string", "hello", 10, "hello"},
+		{"exact length", "hello", 5, "hello"},
+		{"needs truncation", "hello world", 5, "hello..."},
+		{"zero maxLen", "hello", 0, "..."},
+		{"negative maxLen", "hello", -1, ""},
+		{"maxLen 1", "hello", 1, "h..."},
+		{"unicode bytes truncate", "你好世界", 10, "你好世\xe7..."},  // Truncate works on bytes, not runes
+		{"mixed truncate", "hello世界abc", 7, "hello\xe4\xb8..."}, // byte-based truncation
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Truncate(tt.s, tt.maxLen)
+			if got != tt.want {
+				t.Errorf("Truncate(%q, %d) = %q, want %q", tt.s, tt.maxLen, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestSafeTruncate(t *testing.T) {
+	tests := []struct {
+		name   string
+		s      string
+		maxLen int
+		want   string
+	}{
+		{"empty string", "", 10, ""},
+		{"zero maxLen", "hello", 0, ""},
+		{"negative maxLen", "hello", -1, ""},
+		{"short string", "hello", 10, "hello"},
+		{"exact length", "hello", 5, "hello"},
+		{"needs truncation", "hello world", 8, "hello..."},
+		{"maxLen 1", "hello", 1, "h"},
+		{"maxLen 2", "hello", 2, "h"},
+		{"maxLen 3", "hello", 3, "h"},
+		{"maxLen 4", "hello", 4, "h..."},
+		{"unicode preserved", "你好世界", 10, "你好世界"},
+		{"unicode exact", "你好世界", 4, "你好世界"},
+		{"unicode truncate", "你好世界test", 6, "你好世..."},
+		{"mixed unicode", "ab你好cd", 5, "ab..."},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := SafeTruncate(tt.s, tt.maxLen)
+			if got != tt.want {
+				t.Errorf("SafeTruncate(%q, %d) = %q, want %q", tt.s, tt.maxLen, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestSanitizeOutput(t *testing.T) {
+	tests := []struct {
+		name string
+		s    string
+		want string
+	}{
+		{"empty string", "", ""},
+		{"plain text", "hello world", "hello world"},
+		{"with newline", "hello\nworld", "hello\nworld"},
+		{"with tab", "hello\tworld", "hello\tworld"},
+		{"ANSI color red", "\x1b[31mred\x1b[0m", "red"},
+		{"ANSI bold", "\x1b[1mbold\x1b[0m", "bold"},
+		{"ANSI complex", "\x1b[1;31;40mtext\x1b[0m", "text"},
+		{"control chars", "hello\x00\x01\x02world", "helloworld"},
+		{"mixed ANSI and control", "\x1b[32m\x00ok\x1b[0m", "ok"},
+		{"multiple ANSI sequences", "\x1b[31mred\x1b[0m \x1b[32mgreen\x1b[0m", "red green"},
+		{"incomplete escape", "\x1b[", ""},
+		{"escape without bracket", "\x1bA", "A"},
+		{"cursor movement", "\x1b[2Aup\x1b[2Bdown", "updown"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := SanitizeOutput(tt.s)
+			if got != tt.want {
+				t.Errorf("SanitizeOutput(%q) = %q, want %q", tt.s, got, tt.want)
+			}
+		})
+	}
+}
+
+func BenchmarkTruncate(b *testing.B) {
+	s := strings.Repeat("hello world ", 100)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Truncate(s, 50)
+	}
+}
+
+func BenchmarkSafeTruncate(b *testing.B) {
+	s := strings.Repeat("你好世界", 100)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		SafeTruncate(s, 50)
+	}
+}
+
+func BenchmarkSanitizeOutput(b *testing.B) {
+	s := strings.Repeat("\x1b[31mred\x1b[0m text ", 50)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		SanitizeOutput(s)
+	}
+}
--- a/codeagent-wrapper/main.go
+++ b/codeagent-wrapper/main.go
@@ -1,505 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"os/signal"
-	"reflect"
-	"strings"
-	"sync/atomic"
-	"time"
-)
-
-const (
-	version               = "5.4.0"
-	defaultWorkdir        = "."
-	defaultTimeout        = 7200 // seconds (2 hours)
-	defaultCoverageTarget = 90.0
-	codexLogLineLimit     = 1000
-	stdinSpecialChars     = "\n\\\"'`$"
-	stderrCaptureLimit    = 4 * 1024
-	defaultBackendName    = "codex"
-	defaultCodexCommand   = "codex"
-
-	// stdout close reasons
-	stdoutCloseReasonWait  = "wait-done"
-	stdoutCloseReasonDrain = "drain-timeout"
-	stdoutCloseReasonCtx   = "context-cancel"
-	stdoutDrainTimeout     = 100 * time.Millisecond
-)
-
-var useASCIIMode = os.Getenv("CODEAGENT_ASCII_MODE") == "true"
-
-// Test hooks for dependency injection
-var (
-	stdinReader  io.Reader = os.Stdin
-	isTerminalFn           = defaultIsTerminal
-	codexCommand           = defaultCodexCommand
-	cleanupHook  func()
-	loggerPtr    atomic.Pointer[Logger]
-
-	buildCodexArgsFn   = buildCodexArgs
-	selectBackendFn    = selectBackend
-	commandContext     = exec.CommandContext
-	jsonMarshal        = json.Marshal
-	cleanupLogsFn      = cleanupOldLogs
-	signalNotifyFn     = signal.Notify
-	signalStopFn       = signal.Stop
-	terminateCommandFn = terminateCommand
-	defaultBuildArgsFn = buildCodexArgs
-	runTaskFn          = runCodexTask
-	exitFn             = os.Exit
-)
-
-var forceKillDelay atomic.Int32
-
-func init() {
-	forceKillDelay.Store(5) // seconds - default value
-}
-
-func runStartupCleanup() {
-	if cleanupLogsFn == nil {
-		return
-	}
-	defer func() {
-		if r := recover(); r != nil {
-			logWarn(fmt.Sprintf("cleanupOldLogs panic: %v", r))
-		}
-	}()
-	if _, err := cleanupLogsFn(); err != nil {
-		logWarn(fmt.Sprintf("cleanupOldLogs error: %v", err))
-	}
-}
-
-func runCleanupMode() int {
-	if cleanupLogsFn == nil {
-		fmt.Fprintln(os.Stderr, "Cleanup failed: log cleanup function not configured")
-		return 1
-	}
-
-	stats, err := cleanupLogsFn()
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Cleanup failed: %v\n", err)
-		return 1
-	}
-
-	fmt.Println("Cleanup completed")
-	fmt.Printf("Files scanned: %d\n", stats.Scanned)
-	fmt.Printf("Files deleted: %d\n", stats.Deleted)
-	if len(stats.DeletedFiles) > 0 {
-		for _, f := range stats.DeletedFiles {
-			fmt.Printf("  - %s\n", f)
-		}
-	}
-	fmt.Printf("Files kept: %d\n", stats.Kept)
-	if len(stats.KeptFiles) > 0 {
-		for _, f := range stats.KeptFiles {
-			fmt.Printf("  - %s\n", f)
-		}
-	}
-	if stats.Errors > 0 {
-		fmt.Printf("Deletion errors: %d\n", stats.Errors)
-	}
-	return 0
-}
-
-func main() {
-	exitCode := run()
-	exitFn(exitCode)
-}
-
-// run is the main logic, returns exit code for testability
-func run() (exitCode int) {
-	name := currentWrapperName()
-	// Handle --version and --help first (no logger needed)
-	if len(os.Args) > 1 {
-		switch os.Args[1] {
-		case "--version", "-v":
-			fmt.Printf("%s version %s\n", name, version)
-			return 0
-		case "--help", "-h":
-			printHelp()
-			return 0
-		case "--cleanup":
-			return runCleanupMode()
-		}
-	}
-
-	// Initialize logger for all other commands
-	logger, err := NewLogger()
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "ERROR: failed to initialize logger: %v\n", err)
-		return 1
-	}
-	setLogger(logger)
-
-	defer func() {
-		logger := activeLogger()
-		if logger != nil {
-			logger.Flush()
-		}
-		if err := closeLogger(); err != nil {
-			fmt.Fprintf(os.Stderr, "ERROR: failed to close logger: %v\n", err)
-		}
-		// On failure, extract and display recent errors before removing log
-		if logger != nil {
-			if exitCode != 0 {
-				if errors := logger.ExtractRecentErrors(10); len(errors) > 0 {
-					fmt.Fprintln(os.Stderr, "\n=== Recent Errors ===")
-					for _, entry := range errors {
-						fmt.Fprintln(os.Stderr, entry)
-					}
-					fmt.Fprintf(os.Stderr, "Log file: %s (deleted)\n", logger.Path())
-				}
-			}
-			if err := logger.RemoveLogFile(); err != nil && !os.IsNotExist(err) {
-				// Silently ignore removal errors
-			}
-		}
-	}()
-	defer runCleanupHook()
-
-	// Clean up stale logs from previous runs.
-	runStartupCleanup()
-
-	// Handle remaining commands
-	if len(os.Args) > 1 {
-		args := os.Args[1:]
-		parallelIndex := -1
-		for i, arg := range args {
-			if arg == "--parallel" {
-				parallelIndex = i
-				break
-			}
-		}
-
-		if parallelIndex != -1 {
-			backendName := defaultBackendName
-			fullOutput := false
-			var extras []string
-
-			for i := 0; i < len(args); i++ {
-				arg := args[i]
-				switch {
-				case arg == "--parallel":
-					continue
-				case arg == "--full-output":
-					fullOutput = true
-				case arg == "--backend":
-					if i+1 >= len(args) {
-						fmt.Fprintln(os.Stderr, "ERROR: --backend flag requires a value")
-						return 1
-					}
-					backendName = args[i+1]
-					i++
-				case strings.HasPrefix(arg, "--backend="):
-					value := strings.TrimPrefix(arg, "--backend=")
-					if value == "" {
-						fmt.Fprintln(os.Stderr, "ERROR: --backend flag requires a value")
-						return 1
-					}
-					backendName = value
-				default:
-					extras = append(extras, arg)
-				}
-			}
-
-			if len(extras) > 0 {
-				fmt.Fprintln(os.Stderr, "ERROR: --parallel reads its task configuration from stdin; only --backend and --full-output are allowed.")
-				fmt.Fprintln(os.Stderr, "Usage examples:")
-				fmt.Fprintf(os.Stderr, "  %s --parallel < tasks.txt\n", name)
-				fmt.Fprintf(os.Stderr, "  echo '...' | %s --parallel\n", name)
-				fmt.Fprintf(os.Stderr, "  %s --parallel <<'EOF'\n", name)
-				fmt.Fprintf(os.Stderr, "  %s --parallel --full-output <<'EOF'  # include full task output\n", name)
-				return 1
-			}
-
-			backend, err := selectBackendFn(backendName)
-			if err != nil {
-				fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
-				return 1
-			}
-			backendName = backend.Name()
-
-			data, err := io.ReadAll(stdinReader)
-			if err != nil {
-				fmt.Fprintf(os.Stderr, "ERROR: failed to read stdin: %v\n", err)
-				return 1
-			}
-
-			cfg, err := parseParallelConfig(data)
-			if err != nil {
-				fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
-				return 1
-			}
-
-			cfg.GlobalBackend = backendName
-			for i := range cfg.Tasks {
-				if strings.TrimSpace(cfg.Tasks[i].Backend) == "" {
-					cfg.Tasks[i].Backend = backendName
-				}
-			}
-
-			timeoutSec := resolveTimeout()
-			layers, err := topologicalSort(cfg.Tasks)
-			if err != nil {
-				fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
-				return 1
-			}
-
-			results := executeConcurrent(layers, timeoutSec)
-
-			// Extract structured report fields from each result
-			for i := range results {
-				results[i].CoverageTarget = defaultCoverageTarget
-				if results[i].Message == "" {
-					continue
-				}
-
-				lines := strings.Split(results[i].Message, "\n")
-
-				// Coverage extraction
-				results[i].Coverage = extractCoverageFromLines(lines)
-				results[i].CoverageNum = extractCoverageNum(results[i].Coverage)
-
-				// Files changed
-				results[i].FilesChanged = extractFilesChangedFromLines(lines)
-
-				// Test results
-				results[i].TestsPassed, results[i].TestsFailed = extractTestResultsFromLines(lines)
-
-				// Key output summary
-				results[i].KeyOutput = extractKeyOutputFromLines(lines, 150)
-			}
-
-			// Default: summary mode (context-efficient)
-			// --full-output: legacy full output mode
-			fmt.Println(generateFinalOutputWithMode(results, !fullOutput))
-
-			exitCode = 0
-			for _, res := range results {
-				if res.ExitCode != 0 {
-					exitCode = res.ExitCode
-				}
-			}
-
-			return exitCode
-		}
-	}
-
-	logInfo("Script started")
-
-	cfg, err := parseArgs()
-	if err != nil {
-		logError(err.Error())
-		return 1
-	}
-	logInfo(fmt.Sprintf("Parsed args: mode=%s, task_len=%d, backend=%s", cfg.Mode, len(cfg.Task), cfg.Backend))
-
-	backend, err := selectBackendFn(cfg.Backend)
-	if err != nil {
-		logError(err.Error())
-		return 1
-	}
-	cfg.Backend = backend.Name()
-
-	cmdInjected := codexCommand != defaultCodexCommand
-	argsInjected := buildCodexArgsFn != nil && reflect.ValueOf(buildCodexArgsFn).Pointer() != reflect.ValueOf(defaultBuildArgsFn).Pointer()
-
-	// Wire selected backend into runtime hooks for the rest of the execution,
-	// but preserve any injected test hooks for the default backend.
-	if backend.Name() != defaultBackendName || !cmdInjected {
-		codexCommand = backend.Command()
-	}
-	if backend.Name() != defaultBackendName || !argsInjected {
-		buildCodexArgsFn = backend.BuildArgs
-	}
-	logInfo(fmt.Sprintf("Selected backend: %s", backend.Name()))
-
-	timeoutSec := resolveTimeout()
-	logInfo(fmt.Sprintf("Timeout: %ds", timeoutSec))
-	cfg.Timeout = timeoutSec
-
-	var taskText string
-	var piped bool
-
-	if cfg.ExplicitStdin {
-		logInfo("Explicit stdin mode: reading task from stdin")
-		data, err := io.ReadAll(stdinReader)
-		if err != nil {
-			logError("Failed to read stdin: " + err.Error())
-			return 1
-		}
-		taskText = string(data)
-		if taskText == "" {
-			logError("Explicit stdin mode requires task input from stdin")
-			return 1
-		}
-		piped = !isTerminal()
-	} else {
-		pipedTask, err := readPipedTask()
-		if err != nil {
-			logError("Failed to read piped stdin: " + err.Error())
-			return 1
-		}
-		piped = pipedTask != ""
-		if piped {
-			taskText = pipedTask
-		} else {
-			taskText = cfg.Task
-		}
-	}
-
-	useStdin := cfg.ExplicitStdin || shouldUseStdin(taskText, piped)
-
-	targetArg := taskText
-	if useStdin {
-		targetArg = "-"
-	}
-	codexArgs := buildCodexArgsFn(cfg, targetArg)
-
-	// Print startup information to stderr
-	fmt.Fprintf(os.Stderr, "[%s]\n", name)
-	fmt.Fprintf(os.Stderr, "  Backend: %s\n", cfg.Backend)
-	fmt.Fprintf(os.Stderr, "  Command: %s %s\n", codexCommand, strings.Join(codexArgs, " "))
-	fmt.Fprintf(os.Stderr, "  PID: %d\n", os.Getpid())
-	fmt.Fprintf(os.Stderr, "  Log: %s\n", logger.Path())
-
-	if useStdin {
-		var reasons []string
-		if piped {
-			reasons = append(reasons, "piped input")
-		}
-		if cfg.ExplicitStdin {
-			reasons = append(reasons, "explicit \"-\"")
-		}
-		if strings.Contains(taskText, "\n") {
-			reasons = append(reasons, "newline")
-		}
-		if strings.Contains(taskText, "\\") {
-			reasons = append(reasons, "backslash")
-		}
-		if strings.Contains(taskText, "\"") {
-			reasons = append(reasons, "double-quote")
-		}
-		if strings.Contains(taskText, "'") {
-			reasons = append(reasons, "single-quote")
-		}
-		if strings.Contains(taskText, "`") {
-			reasons = append(reasons, "backtick")
-		}
-		if strings.Contains(taskText, "$") {
-			reasons = append(reasons, "dollar")
-		}
-		if len(taskText) > 800 {
-			reasons = append(reasons, "length>800")
-		}
-		if len(reasons) > 0 {
-			logWarn(fmt.Sprintf("Using stdin mode for task due to: %s", strings.Join(reasons, ", ")))
-		}
-	}
-
-	logInfo(fmt.Sprintf("%s running...", cfg.Backend))
-
-	taskSpec := TaskSpec{
-		Task:      taskText,
-		WorkDir:   cfg.WorkDir,
-		Mode:      cfg.Mode,
-		SessionID: cfg.SessionID,
-		UseStdin:  useStdin,
-	}
-
-	result := runTaskFn(taskSpec, false, cfg.Timeout)
-
-	if result.ExitCode != 0 {
-		return result.ExitCode
-	}
-
-	fmt.Println(result.Message)
-	if result.SessionID != "" {
-		fmt.Printf("\n---\nSESSION_ID: %s\n", result.SessionID)
-	}
-
-	return 0
-}
-
-func setLogger(l *Logger) {
-	loggerPtr.Store(l)
-}
-
-func closeLogger() error {
-	logger := loggerPtr.Swap(nil)
-	if logger == nil {
-		return nil
-	}
-	return logger.Close()
-}
-
-func activeLogger() *Logger {
-	return loggerPtr.Load()
-}
-
-func logInfo(msg string) {
-	if logger := activeLogger(); logger != nil {
-		logger.Info(msg)
-	}
-}
-
-func logWarn(msg string) {
-	if logger := activeLogger(); logger != nil {
-		logger.Warn(msg)
-	}
-}
-
-func logError(msg string) {
-	if logger := activeLogger(); logger != nil {
-		logger.Error(msg)
-	}
-}
-
-func runCleanupHook() {
-	if logger := activeLogger(); logger != nil {
-		logger.Flush()
-	}
-	if cleanupHook != nil {
-		cleanupHook()
-	}
-}
-
-func printHelp() {
-	name := currentWrapperName()
-	help := fmt.Sprintf(`%[1]s - Go wrapper for AI CLI backends
-
-Usage:
-    %[1]s "task" [workdir]
-    %[1]s --backend claude "task" [workdir]
-    %[1]s - [workdir]              Read task from stdin
-    %[1]s resume <session_id> "task" [workdir]
-    %[1]s resume <session_id> - [workdir]
-    %[1]s --parallel               Run tasks in parallel (config from stdin)
-    %[1]s --parallel --full-output Run tasks in parallel with full output (legacy)
-    %[1]s --version
-    %[1]s --help
-
-Parallel mode examples:
-    %[1]s --parallel < tasks.txt
-    echo '...' | %[1]s --parallel
-    %[1]s --parallel --full-output < tasks.txt
-    %[1]s --parallel <<'EOF'
-
-Environment Variables:
-    CODEX_TIMEOUT         Timeout in milliseconds (default: 7200000)
-    CODEAGENT_ASCII_MODE  Use ASCII symbols instead of Unicode (PASS/WARN/FAIL)
-
-Exit Codes:
-    0    Success
-    1    General error (missing args, no output)
-    124  Timeout
-    127  backend command not found
-    130  Interrupted (Ctrl+C)
-    *    Passthrough from backend process`, name)
-	fmt.Println(help)
-}
--- a/codeagent-wrapper/process_check_test.go
+++ b/codeagent-wrapper/process_check_test.go
@@ -1,217 +0,0 @@
-//go:build unix || darwin || linux
-// +build unix darwin linux
-
-package main
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"os/exec"
-	"runtime"
-	"strconv"
-	"strings"
-	"testing"
-	"time"
-)
-
-func TestIsProcessRunning(t *testing.T) {
-	t.Run("current process", func(t *testing.T) {
-		if !isProcessRunning(os.Getpid()) {
-			t.Fatalf("expected current process (pid=%d) to be running", os.Getpid())
-		}
-	})
-
-	t.Run("fake pid", func(t *testing.T) {
-		const nonexistentPID = 1 << 30
-		if isProcessRunning(nonexistentPID) {
-			t.Fatalf("expected pid %d to be reported as not running", nonexistentPID)
-		}
-	})
-
-	t.Run("terminated process", func(t *testing.T) {
-		pid := exitedProcessPID(t)
-		if isProcessRunning(pid) {
-			t.Fatalf("expected exited child process (pid=%d) to be reported as not running", pid)
-		}
-	})
-
-	t.Run("boundary values", func(t *testing.T) {
-		if isProcessRunning(0) {
-			t.Fatalf("pid 0 should never be treated as running")
-		}
-		if isProcessRunning(-42) {
-			t.Fatalf("negative pid should never be treated as running")
-		}
-	})
-
-	t.Run("find process error", func(t *testing.T) {
-		original := findProcess
-		defer func() { findProcess = original }()
-
-		mockErr := errors.New("findProcess failure")
-		findProcess = func(pid int) (*os.Process, error) {
-			return nil, mockErr
-		}
-
-		if isProcessRunning(1234) {
-			t.Fatalf("expected false when os.FindProcess fails")
-		}
-	})
-}
-
-func exitedProcessPID(t *testing.T) int {
-	t.Helper()
-
-	var cmd *exec.Cmd
-	if runtime.GOOS == "windows" {
-		cmd = exec.Command("cmd", "/c", "exit 0")
-	} else {
-		cmd = exec.Command("sh", "-c", "exit 0")
-	}
-
-	if err := cmd.Start(); err != nil {
-		t.Fatalf("failed to start helper process: %v", err)
-	}
-	pid := cmd.Process.Pid
-
-	if err := cmd.Wait(); err != nil {
-		t.Fatalf("helper process did not exit cleanly: %v", err)
-	}
-
-	time.Sleep(50 * time.Millisecond)
-	return pid
-}
-
-func TestRunProcessCheckSmoke(t *testing.T) {
-	t.Run("current process", func(t *testing.T) {
-		if !isProcessRunning(os.Getpid()) {
-			t.Fatalf("expected current process (pid=%d) to be running", os.Getpid())
-		}
-	})
-
-	t.Run("fake pid", func(t *testing.T) {
-		const nonexistentPID = 1 << 30
-		if isProcessRunning(nonexistentPID) {
-			t.Fatalf("expected pid %d to be reported as not running", nonexistentPID)
-		}
-	})
-
-	t.Run("boundary values", func(t *testing.T) {
-		if isProcessRunning(0) {
-			t.Fatalf("pid 0 should never be treated as running")
-		}
-		if isProcessRunning(-42) {
-			t.Fatalf("negative pid should never be treated as running")
-		}
-	})
-
-	t.Run("find process error", func(t *testing.T) {
-		original := findProcess
-		defer func() { findProcess = original }()
-
-		mockErr := errors.New("findProcess failure")
-		findProcess = func(pid int) (*os.Process, error) {
-			return nil, mockErr
-		}
-
-		if isProcessRunning(1234) {
-			t.Fatalf("expected false when os.FindProcess fails")
-		}
-	})
-}
-
-func TestGetProcessStartTimeReadsProcStat(t *testing.T) {
-	pid := 4321
-	boot := time.Unix(1_710_000_000, 0)
-	startTicks := uint64(4500)
-
-	statFields := make([]string, 25)
-	for i := range statFields {
-		statFields[i] = strconv.Itoa(i + 1)
-	}
-	statFields[19] = strconv.FormatUint(startTicks, 10)
-	statContent := fmt.Sprintf("%d (%s) %s", pid, "cmd with space", strings.Join(statFields, " "))
-
-	stubReadFile(t, func(path string) ([]byte, error) {
-		switch path {
-		case fmt.Sprintf("/proc/%d/stat", pid):
-			return []byte(statContent), nil
-		case "/proc/stat":
-			return []byte(fmt.Sprintf("cpu 0 0 0 0\nbtime %d\n", boot.Unix())), nil
-		default:
-			return nil, os.ErrNotExist
-		}
-	})
-
-	got := getProcessStartTime(pid)
-	want := boot.Add(time.Duration(startTicks/100) * time.Second)
-	if !got.Equal(want) {
-		t.Fatalf("getProcessStartTime() = %v, want %v", got, want)
-	}
-}
-
-func TestGetProcessStartTimeInvalidData(t *testing.T) {
-	pid := 99
-	stubReadFile(t, func(path string) ([]byte, error) {
-		switch path {
-		case fmt.Sprintf("/proc/%d/stat", pid):
-			return []byte("garbage"), nil
-		case "/proc/stat":
-			return []byte("btime not-a-number\n"), nil
-		default:
-			return nil, os.ErrNotExist
-		}
-	})
-
-	if got := getProcessStartTime(pid); !got.IsZero() {
-		t.Fatalf("invalid /proc data should return zero time, got %v", got)
-	}
-}
-
-func TestGetBootTimeParsesBtime(t *testing.T) {
-	const bootSec = 1_711_111_111
-	stubReadFile(t, func(path string) ([]byte, error) {
-		if path != "/proc/stat" {
-			return nil, os.ErrNotExist
-		}
-		content := fmt.Sprintf("intr 0\nbtime %d\n", bootSec)
-		return []byte(content), nil
-	})
-
-	got := getBootTime()
-	want := time.Unix(bootSec, 0)
-	if !got.Equal(want) {
-		t.Fatalf("getBootTime() = %v, want %v", got, want)
-	}
-}
-
-func TestGetBootTimeInvalidData(t *testing.T) {
-	cases := []struct {
-		name    string
-		content string
-	}{
-		{"missing", "cpu 0 0 0 0"},
-		{"malformed", "btime abc"},
-	}
-
-	for _, tt := range cases {
-		t.Run(tt.name, func(t *testing.T) {
-			stubReadFile(t, func(string) ([]byte, error) {
-				return []byte(tt.content), nil
-			})
-			if got := getBootTime(); !got.IsZero() {
-				t.Fatalf("getBootTime() unexpected value for %s: %v", tt.name, got)
-			}
-		})
-	}
-}
-
-func stubReadFile(t *testing.T, fn func(string) ([]byte, error)) {
-	t.Helper()
-	original := readFileFn
-	readFileFn = fn
-	t.Cleanup(func() {
-		readFileFn = original
-	})
-}
--- a/codeagent-wrapper/process_check_unix.go
+++ b/codeagent-wrapper/process_check_unix.go
@@ -1,104 +0,0 @@
-//go:build unix || darwin || linux
-// +build unix darwin linux
-
-package main
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-	"syscall"
-	"time"
-)
-
-var findProcess = os.FindProcess
-var readFileFn = os.ReadFile
-
-// isProcessRunning returns true if a process with the given pid is running on Unix-like systems.
-func isProcessRunning(pid int) bool {
-	if pid <= 0 {
-		return false
-	}
-
-	proc, err := findProcess(pid)
-	if err != nil || proc == nil {
-		return false
-	}
-
-	err = proc.Signal(syscall.Signal(0))
-	if err != nil && (errors.Is(err, syscall.ESRCH) || errors.Is(err, os.ErrProcessDone)) {
-		return false
-	}
-	return true
-}
-
-// getProcessStartTime returns the start time of a process on Unix-like systems.
-// Returns zero time if the start time cannot be determined.
-func getProcessStartTime(pid int) time.Time {
-	if pid <= 0 {
-		return time.Time{}
-	}
-
-	// Read /proc/<pid>/stat to get process start time
-	statPath := fmt.Sprintf("/proc/%d/stat", pid)
-	data, err := readFileFn(statPath)
-	if err != nil {
-		return time.Time{}
-	}
-
-	// Parse stat file: fields are space-separated, but comm (field 2) can contain spaces
-	// Find the last ')' to skip comm field safely
-	content := string(data)
-	lastParen := strings.LastIndex(content, ")")
-	if lastParen == -1 {
-		return time.Time{}
-	}
-
-	fields := strings.Fields(content[lastParen+1:])
-	if len(fields) < 20 {
-		return time.Time{}
-	}
-
-	// Field 22 (index 19 after comm) is starttime in clock ticks since boot
-	startTicks, err := strconv.ParseUint(fields[19], 10, 64)
-	if err != nil {
-		return time.Time{}
-	}
-
-	// Get system boot time
-	bootTime := getBootTime()
-	if bootTime.IsZero() {
-		return time.Time{}
-	}
-
-	// Convert ticks to duration (typically 100 ticks/sec on most systems)
-	ticksPerSec := uint64(100) // sysconf(_SC_CLK_TCK), typically 100
-	startTime := bootTime.Add(time.Duration(startTicks/ticksPerSec) * time.Second)
-
-	return startTime
-}
-
-// getBootTime returns the system boot time by reading /proc/stat.
-func getBootTime() time.Time {
-	data, err := readFileFn("/proc/stat")
-	if err != nil {
-		return time.Time{}
-	}
-
-	lines := strings.Split(string(data), "\n")
-	for _, line := range lines {
-		if strings.HasPrefix(line, "btime ") {
-			fields := strings.Fields(line)
-			if len(fields) >= 2 {
-				bootSec, err := strconv.ParseInt(fields[1], 10, 64)
-				if err == nil {
-					return time.Unix(bootSec, 0)
-				}
-			}
-		}
-	}
-
-	return time.Time{}
-}
--- a/codeagent-wrapper/process_check_windows.go
+++ b/codeagent-wrapper/process_check_windows.go
@@ -1,87 +0,0 @@
-//go:build windows
-// +build windows
-
-package main
-
-import (
-	"errors"
-	"os"
-	"syscall"
-	"time"
-	"unsafe"
-)
-
-const (
-	processQueryLimitedInformation = 0x1000
-	stillActive                    = 259 // STILL_ACTIVE exit code
-)
-
-var (
-	findProcess       = os.FindProcess
-	kernel32          = syscall.NewLazyDLL("kernel32.dll")
-	getProcessTimes   = kernel32.NewProc("GetProcessTimes")
-	fileTimeToUnixFn  = fileTimeToUnix
-)
-
-// isProcessRunning returns true if a process with the given pid is running on Windows.
-func isProcessRunning(pid int) bool {
-	if pid <= 0 {
-		return false
-	}
-
-	if _, err := findProcess(pid); err != nil {
-		return false
-	}
-
-	handle, err := syscall.OpenProcess(processQueryLimitedInformation, false, uint32(pid))
-	if err != nil {
-		if errors.Is(err, syscall.ERROR_ACCESS_DENIED) {
-			return true
-		}
-		return false
-	}
-	defer syscall.CloseHandle(handle)
-
-	var exitCode uint32
-	if err := syscall.GetExitCodeProcess(handle, &exitCode); err != nil {
-		return true
-	}
-
-	return exitCode == stillActive
-}
-
-// getProcessStartTime returns the start time of a process on Windows.
-// Returns zero time if the start time cannot be determined.
-func getProcessStartTime(pid int) time.Time {
-	if pid <= 0 {
-		return time.Time{}
-	}
-
-	handle, err := syscall.OpenProcess(processQueryLimitedInformation, false, uint32(pid))
-	if err != nil {
-		return time.Time{}
-	}
-	defer syscall.CloseHandle(handle)
-
-	var creationTime, exitTime, kernelTime, userTime syscall.Filetime
-	ret, _, _ := getProcessTimes.Call(
-		uintptr(handle),
-		uintptr(unsafe.Pointer(&creationTime)),
-		uintptr(unsafe.Pointer(&exitTime)),
-		uintptr(unsafe.Pointer(&kernelTime)),
-		uintptr(unsafe.Pointer(&userTime)),
-	)
-
-	if ret == 0 {
-		return time.Time{}
-	}
-
-	return fileTimeToUnixFn(creationTime)
-}
-
-// fileTimeToUnix converts Windows FILETIME to Unix time.
-func fileTimeToUnix(ft syscall.Filetime) time.Time {
-	// FILETIME is 100-nanosecond intervals since January 1, 1601 UTC
-	nsec := ft.Nanoseconds()
-	return time.Unix(0, nsec)
-}
--- a/codeagent-wrapper/wrapper_name.go
+++ b/codeagent-wrapper/wrapper_name.go
@@ -1,126 +0,0 @@
-package main
-
-import (
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-const (
-	defaultWrapperName = "codeagent-wrapper"
-	legacyWrapperName  = "codex-wrapper"
-)
-
-var executablePathFn = os.Executable
-
-func normalizeWrapperName(path string) string {
-	if path == "" {
-		return ""
-	}
-
-	base := filepath.Base(path)
-	base = strings.TrimSuffix(base, ".exe") // tolerate Windows executables
-
-	switch base {
-	case defaultWrapperName, legacyWrapperName:
-		return base
-	default:
-		return ""
-	}
-}
-
-// currentWrapperName resolves the wrapper name based on the invoked binary.
-// Only known names are honored to avoid leaking build/test binary names into logs.
-func currentWrapperName() string {
-	if len(os.Args) == 0 {
-		return defaultWrapperName
-	}
-
-	if name := normalizeWrapperName(os.Args[0]); name != "" {
-		return name
-	}
-
-	execPath, err := executablePathFn()
-	if err == nil {
-		if name := normalizeWrapperName(execPath); name != "" {
-			return name
-		}
-
-		if resolved, err := filepath.EvalSymlinks(execPath); err == nil {
-			if name := normalizeWrapperName(resolved); name != "" {
-				return name
-			}
-			if alias := resolveAlias(execPath, resolved); alias != "" {
-				return alias
-			}
-		}
-
-		if alias := resolveAlias(execPath, ""); alias != "" {
-			return alias
-		}
-	}
-
-	return defaultWrapperName
-}
-
-// logPrefixes returns the set of accepted log name prefixes, including the
-// current wrapper name and legacy aliases.
-func logPrefixes() []string {
-	prefixes := []string{currentWrapperName(), defaultWrapperName, legacyWrapperName}
-	seen := make(map[string]struct{}, len(prefixes))
-	var unique []string
-	for _, prefix := range prefixes {
-		if prefix == "" {
-			continue
-		}
-		if _, ok := seen[prefix]; ok {
-			continue
-		}
-		seen[prefix] = struct{}{}
-		unique = append(unique, prefix)
-	}
-	return unique
-}
-
-// primaryLogPrefix returns the preferred filename prefix for log files.
-// Defaults to the current wrapper name when available, otherwise falls back
-// to the canonical default name.
-func primaryLogPrefix() string {
-	prefixes := logPrefixes()
-	if len(prefixes) == 0 {
-		return defaultWrapperName
-	}
-	return prefixes[0]
-}
-
-func resolveAlias(execPath string, target string) string {
-	if execPath == "" {
-		return ""
-	}
-
-	dir := filepath.Dir(execPath)
-	for _, candidate := range []string{defaultWrapperName, legacyWrapperName} {
-		aliasPath := filepath.Join(dir, candidate)
-		info, err := os.Lstat(aliasPath)
-		if err != nil {
-			continue
-		}
-		if info.Mode()&os.ModeSymlink == 0 {
-			continue
-		}
-
-		resolved, err := filepath.EvalSymlinks(aliasPath)
-		if err != nil {
-			continue
-		}
-		if target != "" && resolved != target {
-			continue
-		}
-
-		if name := normalizeWrapperName(aliasPath); name != "" {
-			return name
-		}
-	}
-
-	return ""
-}
--- a/codeagent-wrapper/wrapper_name_test.go
+++ b/codeagent-wrapper/wrapper_name_test.go
@@ -1,50 +0,0 @@
-package main
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-)
-
-func TestCurrentWrapperNameFallsBackToExecutable(t *testing.T) {
-	defer resetTestHooks()
-
-	tempDir := t.TempDir()
-	execPath := filepath.Join(tempDir, "codeagent-wrapper")
-	if err := os.WriteFile(execPath, []byte("#!/bin/true\n"), 0o755); err != nil {
-		t.Fatalf("failed to write fake binary: %v", err)
-	}
-
-	os.Args = []string{filepath.Join(tempDir, "custom-name")}
-	executablePathFn = func() (string, error) {
-		return execPath, nil
-	}
-
-	if got := currentWrapperName(); got != defaultWrapperName {
-		t.Fatalf("currentWrapperName() = %q, want %q", got, defaultWrapperName)
-	}
-}
-
-func TestCurrentWrapperNameDetectsLegacyAliasSymlink(t *testing.T) {
-	defer resetTestHooks()
-
-	tempDir := t.TempDir()
-	execPath := filepath.Join(tempDir, "wrapper")
-	aliasPath := filepath.Join(tempDir, legacyWrapperName)
-
-	if err := os.WriteFile(execPath, []byte("#!/bin/true\n"), 0o755); err != nil {
-		t.Fatalf("failed to write fake binary: %v", err)
-	}
-	if err := os.Symlink(execPath, aliasPath); err != nil {
-		t.Fatalf("failed to create alias: %v", err)
-	}
-
-	os.Args = []string{filepath.Join(tempDir, "unknown-runner")}
-	executablePathFn = func() (string, error) {
-		return execPath, nil
-	}
-
-	if got := currentWrapperName(); got != legacyWrapperName {
-		t.Fatalf("currentWrapperName() = %q, want %q", got, legacyWrapperName)
-	}
-}
--- a/config.json
+++ b/config.json
@@ -93,7 +93,7 @@
      ]
    },
    "essentials": {
-      "enabled": true,
+      "enabled": false,
      "description": "Core development commands and utilities",
      "operations": [
        {
@@ -108,6 +108,116 @@
          "description": "Copy development commands documentation"
        }
      ]
+    },
+    "omo": {
+      "enabled": false,
+      "description": "OmO multi-agent orchestration with Sisyphus coordinator",
+      "operations": [
+        {
+          "type": "copy_file",
+          "source": "skills/omo/SKILL.md",
+          "target": "skills/omo/SKILL.md",
+          "description": "Install omo skill"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/oracle.md",
+          "target": "skills/omo/references/oracle.md",
+          "description": "Install oracle agent prompt"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/librarian.md",
+          "target": "skills/omo/references/librarian.md",
+          "description": "Install librarian agent prompt"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/explore.md",
+          "target": "skills/omo/references/explore.md",
+          "description": "Install explore agent prompt"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/frontend-ui-ux-engineer.md",
+          "target": "skills/omo/references/frontend-ui-ux-engineer.md",
+          "description": "Install frontend-ui-ux-engineer agent prompt"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/document-writer.md",
+          "target": "skills/omo/references/document-writer.md",
+          "description": "Install document-writer agent prompt"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/omo/references/develop.md",
+          "target": "skills/omo/references/develop.md",
+          "description": "Install develop agent prompt"
+        }
+      ]
+    },
+    "sparv": {
+      "enabled": false,
+      "description": "SPARV workflow (Specify→Plan→Act→Review→Vault) with 10-point gate",
+      "operations": [
+        {
+          "type": "copy_dir",
+          "source": "skills/sparv",
+          "target": "skills/sparv",
+          "description": "Install sparv skill with all scripts and hooks"
+        }
+      ]
+    },
+    "feature-dev": {
+      "enabled": false,
+      "description": "7-phase feature development workflow with codeagent orchestration",
+      "operations": [
+        {
+          "type": "copy_dir",
+          "source": "skills/feature-dev",
+          "target": "skills/feature-dev",
+          "description": "Install feature-dev skill with hooks"
+        }
+      ]
+    },
+    "course": {
+      "enabled": false,
+      "description": "课程开发工作流，包含 dev、产品需求和测试用例技能",
+      "operations": [
+        {
+          "type": "copy_dir",
+          "source": "skills/dev",
+          "target": "skills/dev",
+          "description": "Install dev skill with agents"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/product-requirements/SKILL.md",
+          "target": "skills/product-requirements/SKILL.md",
+          "description": "Install product-requirements skill"
+        },
+        {
+          "type": "copy_dir",
+          "source": "skills/test-cases",
+          "target": "skills/test-cases",
+          "description": "Install test-cases skill with references"
+        },
+        {
+          "type": "copy_file",
+          "source": "skills/codeagent/SKILL.md",
+          "target": "skills/codeagent/SKILL.md",
+          "description": "Install codeagent skill"
+        },
+        {
+          "type": "run_command",
+          "command": "bash install.sh",
+          "description": "Install codeagent-wrapper binary",
+          "env": {
+            "INSTALL_DIR": "${install_dir}"
+          }
+        }
+      ]
    }
  }
 }
--- a/dev-workflow/.claude-plugin/plugin.json
+++ b/dev-workflow/.claude-plugin/plugin.json
@@ -0,0 +1,9 @@
+{
+  "name": "dev",
+  "description": "Lightweight development workflow with requirements clarification, parallel codex execution, and mandatory 90% test coverage",
+  "version": "5.6.1",
+  "author": {
+    "name": "cexll",
+    "email": "cexll@cexll.com"
+  }
+}
--- a/development-essentials/.claude-plugin/marketplace.json
+++ b/development-essentials/.claude-plugin/marketplace.json
@@ -1,44 +0,0 @@
-{
-  "name": "development-essentials",
-  "source": "./",
-  "description": "Essential development commands for coding, debugging, testing, optimization, and documentation",
-  "version": "1.0.0",
-  "author": {
-    "name": "Claude Code Dev Workflows",
-    "url": "https://github.com/cexll/myclaude"
-  },
-  "homepage": "https://github.com/cexll/myclaude",
-  "repository": "https://github.com/cexll/myclaude",
-  "license": "MIT",
-  "keywords": [
-    "code",
-    "debug",
-    "test",
-    "optimize",
-    "review",
-    "bugfix",
-    "refactor",
-    "documentation"
-  ],
-  "category": "essentials",
-  "strict": false,
-  "commands": [
-    "./commands/code.md",
-    "./commands/debug.md",
-    "./commands/test.md",
-    "./commands/optimize.md",
-    "./commands/review.md",
-    "./commands/bugfix.md",
-    "./commands/refactor.md",
-    "./commands/docs.md",
-    "./commands/ask.md",
-    "./commands/think.md"
-  ],
-  "agents": [
-    "./agents/code.md",
-    "./agents/bugfix.md",
-    "./agents/bugfix-verify.md",
-    "./agents/optimize.md",
-    "./agents/debug.md"
-  ]
-}
--- a/development-essentials/.claude-plugin/plugin.json
+++ b/development-essentials/.claude-plugin/plugin.json
@@ -0,0 +1,9 @@
+{
+  "name": "essentials",
+  "description": "Essential development commands for coding, debugging, testing, optimization, and documentation",
+  "version": "5.6.1",
+  "author": {
+    "name": "cexll",
+    "email": "cexll@cexll.com"
+  }
+}
--- a/docs/CODEAGENT-WRAPPER.md
+++ b/docs/CODEAGENT-WRAPPER.md
@@ -322,6 +322,8 @@ Error: dependency backend_1701234567 failed
 | Variable | Default | Description |
 |----------|---------|-------------|
 | `CODEX_TIMEOUT` | 7200000 | Timeout in milliseconds |
+| `CODEX_BYPASS_SANDBOX` | true | Bypass Codex sandbox/approval. Set `false` to disable |
+| `CODEAGENT_SKIP_PERMISSIONS` | true | Skip Claude permission prompts. Set `false` to disable |

 ## Troubleshooting

--- a/go.work.sum
+++ b/go.work.sum
@@ -0,0 +1,143 @@
+cloud.google.com/go v0.112.1 h1:uJSeirPke5UNZHIb4SxfZklVSiWWVqW4oXlETwZziwM=
+cloud.google.com/go v0.112.1/go.mod h1:+Vbu+Y1UU+I1rjmzeMOb/8RfkKJK2Gyxi1X6jJCZLo4=
+cloud.google.com/go/compute v1.24.0 h1:phWcR2eWzRJaL/kOiJwfFsPs4BaKq1j6vnpZrc1YlVg=
+cloud.google.com/go/compute v1.24.0/go.mod h1:kw1/T+h/+tK2LJK0wiPPx1intgdAM3j/g3hFDlscY40=
+cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+cloud.google.com/go/firestore v1.15.0 h1:/k8ppuWOtNuDHt2tsRV42yI21uaGnKDEQnRFeBpbFF8=
+cloud.google.com/go/firestore v1.15.0/go.mod h1:GWOxFXcv8GZUtYpWHw/w6IuYNux/BtmeVTMmjrm4yhk=
+cloud.google.com/go/iam v1.1.5 h1:1jTsCu4bcsNsE4iiqNT5SHwrDRCfRmIaaaVFhRveTJI=
+cloud.google.com/go/iam v1.1.5/go.mod h1:rB6P/Ic3mykPbFio+vo7403drjlgvoWfYpJhMXEbzv8=
+cloud.google.com/go/longrunning v0.5.5 h1:GOE6pZFdSrTb4KAiKnXsJBtlE6mEyaW44oKyMILWnOg=
+cloud.google.com/go/longrunning v0.5.5/go.mod h1:WV2LAxD8/rg5Z1cNW6FJ/ZpX4E4VnDnoTk0yawPBB7s=
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--- a/install.py
+++ b/install.py
@@ -23,6 +23,7 @@ except ImportError:  # pragma: no cover
    jsonschema = None

 DEFAULT_INSTALL_DIR = "~/.claude"
+SETTINGS_FILE = "settings.json"


 def _ensure_list(ctx: Dict[str, Any], key: str) -> List[Any]:
@@ -46,7 +47,7 @@ def parse_args(argv: Optional[Iterable[str]] = None) -> argparse.Namespace:
    )
    parser.add_argument(
        "--module",
-        help="Comma-separated modules to install, or 'all' for all enabled",
+        help="Comma-separated modules to install/uninstall, or 'all'",
    )
    parser.add_argument(
        "--config",
@@ -58,6 +59,16 @@ def parse_args(argv: Optional[Iterable[str]] = None) -> argparse.Namespace:
        action="store_true",
        help="List available modules and exit",
    )
+    parser.add_argument(
+        "--status",
+        action="store_true",
+        help="Show installation status of all modules",
+    )
+    parser.add_argument(
+        "--uninstall",
+        action="store_true",
+        help="Uninstall specified modules",
+    )
    parser.add_argument(
        "--force",
        action="store_true",
@@ -81,6 +92,151 @@ def _load_json(path: Path) -> Any:
        raise ValueError(f"Invalid JSON in {path}: {exc}") from exc


+def _save_json(path: Path, data: Any) -> None:
+    """Save data to JSON file with proper formatting."""
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with path.open("w", encoding="utf-8") as fh:
+        json.dump(data, fh, indent=2, ensure_ascii=False)
+        fh.write("\n")
+
+
+# =============================================================================
+# Hooks Management
+# =============================================================================
+
+def load_settings(ctx: Dict[str, Any]) -> Dict[str, Any]:
+    """Load settings.json from install directory."""
+    settings_path = ctx["install_dir"] / SETTINGS_FILE
+    if settings_path.exists():
+        try:
+            return _load_json(settings_path)
+        except (ValueError, FileNotFoundError):
+            return {}
+    return {}
+
+
+def save_settings(ctx: Dict[str, Any], settings: Dict[str, Any]) -> None:
+    """Save settings.json to install directory."""
+    settings_path = ctx["install_dir"] / SETTINGS_FILE
+    _save_json(settings_path, settings)
+
+
+def find_module_hooks(module_name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> Optional[tuple]:
+    """Find hooks.json for a module if it exists.
+
+    Returns tuple of (hooks_config, plugin_root_path) or None.
+    """
+    # Check for hooks in operations (copy_dir targets)
+    for op in cfg.get("operations", []):
+        if op.get("type") == "copy_dir":
+            target_dir = ctx["install_dir"] / op["target"]
+            hooks_file = target_dir / "hooks" / "hooks.json"
+            if hooks_file.exists():
+                try:
+                    return (_load_json(hooks_file), str(target_dir))
+                except (ValueError, FileNotFoundError):
+                    pass
+
+    # Also check source directory during install
+    for op in cfg.get("operations", []):
+        if op.get("type") == "copy_dir":
+            target_dir = ctx["install_dir"] / op["target"]
+            source_dir = ctx["config_dir"] / op["source"]
+            hooks_file = source_dir / "hooks" / "hooks.json"
+            if hooks_file.exists():
+                try:
+                    return (_load_json(hooks_file), str(target_dir))
+                except (ValueError, FileNotFoundError):
+                    pass
+
+    return None
+
+
+def _create_hook_marker(module_name: str) -> str:
+    """Create a marker to identify hooks from a specific module."""
+    return f"__module:{module_name}__"
+
+
+def _replace_hook_variables(obj: Any, plugin_root: str) -> Any:
+    """Recursively replace ${CLAUDE_PLUGIN_ROOT} in hook config."""
+    if isinstance(obj, str):
+        return obj.replace("${CLAUDE_PLUGIN_ROOT}", plugin_root)
+    elif isinstance(obj, dict):
+        return {k: _replace_hook_variables(v, plugin_root) for k, v in obj.items()}
+    elif isinstance(obj, list):
+        return [_replace_hook_variables(item, plugin_root) for item in obj]
+    return obj
+
+
+def merge_hooks_to_settings(module_name: str, hooks_config: Dict[str, Any], ctx: Dict[str, Any], plugin_root: str = "") -> None:
+    """Merge module hooks into settings.json."""
+    settings = load_settings(ctx)
+    settings.setdefault("hooks", {})
+
+    module_hooks = hooks_config.get("hooks", {})
+    marker = _create_hook_marker(module_name)
+
+    # Replace ${CLAUDE_PLUGIN_ROOT} with actual path
+    if plugin_root:
+        module_hooks = _replace_hook_variables(module_hooks, plugin_root)
+
+    for hook_type, hook_entries in module_hooks.items():
+        settings["hooks"].setdefault(hook_type, [])
+
+        for entry in hook_entries:
+            # Add marker to identify this hook's source module
+            entry_copy = dict(entry)
+            entry_copy["__module__"] = module_name
+
+            # Check if already exists (avoid duplicates)
+            exists = False
+            for existing in settings["hooks"][hook_type]:
+                if existing.get("__module__") == module_name:
+                    # Same module, check if same hook
+                    if _hooks_equal(existing, entry_copy):
+                        exists = True
+                        break
+
+            if not exists:
+                settings["hooks"][hook_type].append(entry_copy)
+
+    save_settings(ctx, settings)
+    write_log({"level": "INFO", "message": f"Merged hooks for module: {module_name}"}, ctx)
+
+
+def unmerge_hooks_from_settings(module_name: str, ctx: Dict[str, Any]) -> None:
+    """Remove module hooks from settings.json."""
+    settings = load_settings(ctx)
+
+    if "hooks" not in settings:
+        return
+
+    modified = False
+    for hook_type in list(settings["hooks"].keys()):
+        original_len = len(settings["hooks"][hook_type])
+        settings["hooks"][hook_type] = [
+            entry for entry in settings["hooks"][hook_type]
+            if entry.get("__module__") != module_name
+        ]
+        if len(settings["hooks"][hook_type]) < original_len:
+            modified = True
+
+        # Remove empty hook type arrays
+        if not settings["hooks"][hook_type]:
+            del settings["hooks"][hook_type]
+
+    if modified:
+        save_settings(ctx, settings)
+        write_log({"level": "INFO", "message": f"Removed hooks for module: {module_name}"}, ctx)
+
+
+def _hooks_equal(hook1: Dict[str, Any], hook2: Dict[str, Any]) -> bool:
+    """Compare two hooks ignoring the __module__ marker."""
+    h1 = {k: v for k, v in hook1.items() if k != "__module__"}
+    h2 = {k: v for k, v in hook2.items() if k != "__module__"}
+    return h1 == h2
+
+
 def load_config(path: str) -> Dict[str, Any]:
    """Load config and validate against JSON Schema.

@@ -166,22 +322,93 @@ def resolve_paths(config: Dict[str, Any], args: argparse.Namespace) -> Dict[str,

 def list_modules(config: Dict[str, Any]) -> None:
    print("Available Modules:")
-    print(f"{'Name':<15} {'Default':<8} Description")
-    print("-" * 60)
-    for name, cfg in config.get("modules", {}).items():
+    print(f"{'#':<3} {'Name':<15} {'Default':<8} Description")
+    print("-" * 65)
+    for idx, (name, cfg) in enumerate(config.get("modules", {}).items(), 1):
        default = "✓" if cfg.get("enabled", False) else "✗"
        desc = cfg.get("description", "")
-        print(f"{name:<15} {default:<8} {desc}")
+        print(f"{idx:<3} {name:<15} {default:<8} {desc}")
    print("\n✓ = installed by default when no --module specified")


+def load_installed_status(ctx: Dict[str, Any]) -> Dict[str, Any]:
+    """Load installed modules status from status file."""
+    status_path = Path(ctx["status_file"])
+    if status_path.exists():
+        try:
+            return _load_json(status_path)
+        except (ValueError, FileNotFoundError):
+            return {"modules": {}}
+    return {"modules": {}}
+
+
+def check_module_installed(name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> bool:
+    """Check if a module is installed by verifying its files exist."""
+    install_dir = ctx["install_dir"]
+
+    for op in cfg.get("operations", []):
+        op_type = op.get("type")
+        if op_type in ("copy_dir", "copy_file"):
+            target = (install_dir / op["target"]).expanduser().resolve()
+            if target.exists():
+                return True
+    return False
+
+
+def get_installed_modules(config: Dict[str, Any], ctx: Dict[str, Any]) -> Dict[str, bool]:
+    """Get installation status of all modules by checking files."""
+    result = {}
+    modules = config.get("modules", {})
+
+    # First check status file
+    status = load_installed_status(ctx)
+    status_modules = status.get("modules", {})
+
+    for name, cfg in modules.items():
+        # Check both status file and filesystem
+        in_status = name in status_modules
+        files_exist = check_module_installed(name, cfg, ctx)
+        result[name] = in_status or files_exist
+
+    return result
+
+
+def list_modules_with_status(config: Dict[str, Any], ctx: Dict[str, Any]) -> None:
+    """List modules with installation status."""
+    installed_status = get_installed_modules(config, ctx)
+    status_data = load_installed_status(ctx)
+    status_modules = status_data.get("modules", {})
+
+    print("\n" + "=" * 70)
+    print("Module Status")
+    print("=" * 70)
+    print(f"{'#':<3} {'Name':<15} {'Status':<15} {'Installed At':<20} Description")
+    print("-" * 70)
+
+    for idx, (name, cfg) in enumerate(config.get("modules", {}).items(), 1):
+        desc = cfg.get("description", "")[:25]
+        if installed_status.get(name, False):
+            status = "✅ Installed"
+            installed_at = status_modules.get(name, {}).get("installed_at", "")[:16]
+        else:
+            status = "⬚ Not installed"
+            installed_at = ""
+        print(f"{idx:<3} {name:<15} {status:<15} {installed_at:<20} {desc}")
+
+    total = len(config.get("modules", {}))
+    installed_count = sum(1 for v in installed_status.values() if v)
+    print(f"\nTotal: {installed_count}/{total} modules installed")
+    print(f"Install dir: {ctx['install_dir']}")
+
+
 def select_modules(config: Dict[str, Any], module_arg: Optional[str]) -> Dict[str, Any]:
    modules = config.get("modules", {})
    if not module_arg:
-        return {k: v for k, v in modules.items() if v.get("enabled", False)}
+        # No --module specified: show interactive selection
+        return interactive_select_modules(config)

    if module_arg.strip().lower() == "all":
-        return {k: v for k, v in modules.items() if v.get("enabled", False)}
+        return dict(modules.items())

    selected: Dict[str, Any] = {}
    for name in (part.strip() for part in module_arg.split(",")):
@@ -193,6 +420,263 @@ def select_modules(config: Dict[str, Any], module_arg: Optional[str]) -> Dict[st
    return selected


+def interactive_select_modules(config: Dict[str, Any]) -> Dict[str, Any]:
+    """Interactive module selection when no --module is specified."""
+    modules = config.get("modules", {})
+    module_names = list(modules.keys())
+
+    print("\n" + "=" * 65)
+    print("Welcome to Claude Plugin Installer")
+    print("=" * 65)
+    print("\nNo modules specified. Please select modules to install:\n")
+
+    list_modules(config)
+
+    print("\nEnter module numbers or names (comma-separated), or:")
+    print("  'all'  - Install all modules")
+    print("  'q'    - Quit without installing")
+    print()
+
+    while True:
+        try:
+            user_input = input("Select modules: ").strip()
+        except (EOFError, KeyboardInterrupt):
+            print("\nInstallation cancelled.")
+            sys.exit(0)
+
+        if not user_input:
+            print("No input. Please enter module numbers, names, 'all', or 'q'.")
+            continue
+
+        if user_input.lower() == "q":
+            print("Installation cancelled.")
+            sys.exit(0)
+
+        if user_input.lower() == "all":
+            print(f"\nSelected all {len(modules)} modules.")
+            return dict(modules.items())
+
+        # Parse selection
+        selected: Dict[str, Any] = {}
+        parts = [p.strip() for p in user_input.replace(" ", ",").split(",") if p.strip()]
+
+        try:
+            for part in parts:
+                # Try as number first
+                if part.isdigit():
+                    idx = int(part) - 1
+                    if 0 <= idx < len(module_names):
+                        name = module_names[idx]
+                        selected[name] = modules[name]
+                    else:
+                        print(f"Invalid number: {part}. Valid range: 1-{len(module_names)}")
+                        selected = {}
+                        break
+                # Try as name
+                elif part in modules:
+                    selected[part] = modules[part]
+                else:
+                    print(f"Module not found: '{part}'")
+                    selected = {}
+                    break
+
+            if selected:
+                names = ", ".join(selected.keys())
+                print(f"\nSelected {len(selected)} module(s): {names}")
+                return selected
+
+        except ValueError:
+            print("Invalid input. Please try again.")
+            continue
+
+
+def uninstall_module(name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> Dict[str, Any]:
+    """Uninstall a module by removing its files and hooks."""
+    result: Dict[str, Any] = {
+        "module": name,
+        "status": "success",
+        "uninstalled_at": datetime.now().isoformat(),
+    }
+
+    install_dir = ctx["install_dir"]
+    removed_paths = []
+
+    for op in cfg.get("operations", []):
+        op_type = op.get("type")
+        try:
+            if op_type in ("copy_dir", "copy_file"):
+                target = (install_dir / op["target"]).expanduser().resolve()
+                if target.exists():
+                    if target.is_dir():
+                        shutil.rmtree(target)
+                    else:
+                        target.unlink()
+                    removed_paths.append(str(target))
+                    write_log({"level": "INFO", "message": f"Removed: {target}"}, ctx)
+            # merge_dir and merge_json are harder to uninstall cleanly, skip
+        except Exception as exc:
+            write_log({"level": "WARNING", "message": f"Failed to remove {op.get('target', 'unknown')}: {exc}"}, ctx)
+
+    # Remove module hooks from settings.json
+    try:
+        unmerge_hooks_from_settings(name, ctx)
+        result["hooks_removed"] = True
+    except Exception as exc:
+        write_log({"level": "WARNING", "message": f"Failed to remove hooks for {name}: {exc}"}, ctx)
+
+    result["removed_paths"] = removed_paths
+    return result
+
+
+def update_status_after_uninstall(uninstalled_modules: List[str], ctx: Dict[str, Any]) -> None:
+    """Remove uninstalled modules from status file."""
+    status = load_installed_status(ctx)
+    modules = status.get("modules", {})
+
+    for name in uninstalled_modules:
+        if name in modules:
+            del modules[name]
+
+    status["modules"] = modules
+    status["updated_at"] = datetime.now().isoformat()
+
+    status_path = Path(ctx["status_file"])
+    with status_path.open("w", encoding="utf-8") as fh:
+        json.dump(status, fh, indent=2, ensure_ascii=False)
+
+
+def interactive_manage(config: Dict[str, Any], ctx: Dict[str, Any]) -> int:
+    """Interactive module management menu."""
+    while True:
+        installed_status = get_installed_modules(config, ctx)
+        modules = config.get("modules", {})
+        module_names = list(modules.keys())
+
+        print("\n" + "=" * 70)
+        print("Claude Plugin Manager")
+        print("=" * 70)
+        print(f"{'#':<3} {'Name':<15} {'Status':<15} Description")
+        print("-" * 70)
+
+        for idx, (name, cfg) in enumerate(modules.items(), 1):
+            desc = cfg.get("description", "")[:30]
+            if installed_status.get(name, False):
+                status = "✅ Installed"
+            else:
+                status = "⬚ Not installed"
+            print(f"{idx:<3} {name:<15} {status:<15} {desc}")
+
+        total = len(modules)
+        installed_count = sum(1 for v in installed_status.values() if v)
+        print(f"\nInstalled: {installed_count}/{total} | Dir: {ctx['install_dir']}")
+
+        print("\nCommands:")
+        print("  i <num/name>  - Install module(s)")
+        print("  u <num/name>  - Uninstall module(s)")
+        print("  q             - Quit")
+        print()
+
+        try:
+            user_input = input("Enter command: ").strip()
+        except (EOFError, KeyboardInterrupt):
+            print("\nExiting.")
+            return 0
+
+        if not user_input:
+            continue
+
+        if user_input.lower() == "q":
+            print("Goodbye!")
+            return 0
+
+        parts = user_input.split(maxsplit=1)
+        cmd = parts[0].lower()
+        args = parts[1] if len(parts) > 1 else ""
+
+        if cmd == "i":
+            # Install
+            selected = _parse_module_selection(args, modules, module_names)
+            if selected:
+                # Filter out already installed
+                to_install = {k: v for k, v in selected.items() if not installed_status.get(k, False)}
+                if not to_install:
+                    print("All selected modules are already installed.")
+                    continue
+                print(f"\nInstalling: {', '.join(to_install.keys())}")
+                results = []
+                for name, cfg in to_install.items():
+                    try:
+                        results.append(execute_module(name, cfg, ctx))
+                        print(f"  ✓ {name} installed")
+                    except Exception as exc:
+                        print(f"  ✗ {name} failed: {exc}")
+                # Update status
+                current_status = load_installed_status(ctx)
+                for r in results:
+                    if r.get("status") == "success":
+                        current_status.setdefault("modules", {})[r["module"]] = r
+                current_status["updated_at"] = datetime.now().isoformat()
+                with Path(ctx["status_file"]).open("w", encoding="utf-8") as fh:
+                    json.dump(current_status, fh, indent=2, ensure_ascii=False)
+
+        elif cmd == "u":
+            # Uninstall
+            selected = _parse_module_selection(args, modules, module_names)
+            if selected:
+                # Filter to only installed ones
+                to_uninstall = {k: v for k, v in selected.items() if installed_status.get(k, False)}
+                if not to_uninstall:
+                    print("None of the selected modules are installed.")
+                    continue
+                print(f"\nUninstalling: {', '.join(to_uninstall.keys())}")
+                confirm = input("Confirm? (y/N): ").strip().lower()
+                if confirm != "y":
+                    print("Cancelled.")
+                    continue
+                for name, cfg in to_uninstall.items():
+                    try:
+                        uninstall_module(name, cfg, ctx)
+                        print(f"  ✓ {name} uninstalled")
+                    except Exception as exc:
+                        print(f"  ✗ {name} failed: {exc}")
+                update_status_after_uninstall(list(to_uninstall.keys()), ctx)
+
+        else:
+            print(f"Unknown command: {cmd}. Use 'i', 'u', or 'q'.")
+
+
+def _parse_module_selection(
+    args: str, modules: Dict[str, Any], module_names: List[str]
+) -> Dict[str, Any]:
+    """Parse module selection from user input."""
+    if not args:
+        print("Please specify module number(s) or name(s).")
+        return {}
+
+    if args.lower() == "all":
+        return dict(modules.items())
+
+    selected: Dict[str, Any] = {}
+    parts = [p.strip() for p in args.replace(",", " ").split() if p.strip()]
+
+    for part in parts:
+        if part.isdigit():
+            idx = int(part) - 1
+            if 0 <= idx < len(module_names):
+                name = module_names[idx]
+                selected[name] = modules[name]
+            else:
+                print(f"Invalid number: {part}")
+                return {}
+        elif part in modules:
+            selected[part] = modules[part]
+        else:
+            print(f"Module not found: '{part}'")
+            return {}
+
+    return selected
+
+
 def ensure_install_dir(path: Path) -> None:
    path = Path(path)
    if path.exists() and not path.is_dir():
@@ -241,6 +725,18 @@ def execute_module(name: str, cfg: Dict[str, Any], ctx: Dict[str, Any]) -> Dict[
            )
            raise

+    # Handle hooks: find and merge module hooks into settings.json
+    hooks_result = find_module_hooks(name, cfg, ctx)
+    if hooks_result:
+        hooks_config, plugin_root = hooks_result
+        try:
+            merge_hooks_to_settings(name, hooks_config, ctx, plugin_root)
+            result["operations"].append({"type": "merge_hooks", "status": "success"})
+            result["has_hooks"] = True
+        except Exception as exc:
+            write_log({"level": "WARNING", "message": f"Failed to merge hooks for {name}: {exc}"}, ctx)
+            result["operations"].append({"type": "merge_hooks", "status": "failed", "error": str(exc)})
+
    return result


@@ -529,10 +1025,54 @@ def main(argv: Optional[Iterable[str]] = None) -> int:

    ctx = resolve_paths(config, args)

+    # Handle --list-modules
    if getattr(args, "list_modules", False):
        list_modules(config)
        return 0

+    # Handle --status
+    if getattr(args, "status", False):
+        list_modules_with_status(config, ctx)
+        return 0
+
+    # Handle --uninstall
+    if getattr(args, "uninstall", False):
+        if not args.module:
+            print("Error: --uninstall requires --module to specify which modules to uninstall")
+            return 1
+        modules = config.get("modules", {})
+        installed = load_installed_status(ctx)
+        installed_modules = installed.get("modules", {})
+
+        selected = select_modules(config, args.module)
+        to_uninstall = {k: v for k, v in selected.items() if k in installed_modules}
+
+        if not to_uninstall:
+            print("None of the specified modules are installed.")
+            return 0
+
+        print(f"Uninstalling {len(to_uninstall)} module(s): {', '.join(to_uninstall.keys())}")
+        for name, cfg in to_uninstall.items():
+            try:
+                uninstall_module(name, cfg, ctx)
+                print(f"  ✓ {name} uninstalled")
+            except Exception as exc:
+                print(f"  ✗ {name} failed: {exc}", file=sys.stderr)
+
+        update_status_after_uninstall(list(to_uninstall.keys()), ctx)
+        print(f"\n✓ Uninstall complete")
+        return 0
+
+    # No --module specified: enter interactive management mode
+    if not args.module:
+        try:
+            ensure_install_dir(ctx["install_dir"])
+        except Exception as exc:
+            print(f"Failed to prepare install dir: {exc}", file=sys.stderr)
+            return 1
+        return interactive_manage(config, ctx)
+
+    # Install specified modules
    modules = select_modules(config, args.module)

    try:
@@ -568,7 +1108,14 @@ def main(argv: Optional[Iterable[str]] = None) -> int:
            )
            break

-    write_status(results, ctx)
+    # Merge with existing status
+    current_status = load_installed_status(ctx)
+    for r in results:
+        if r.get("status") == "success":
+            current_status.setdefault("modules", {})[r["module"]] = r
+    current_status["updated_at"] = datetime.now().isoformat()
+    with Path(ctx["status_file"]).open("w", encoding="utf-8") as fh:
+        json.dump(current_status, fh, indent=2, ensure_ascii=False)

    # Summary
    success = sum(1 for r in results if r.get("status") == "success")
--- a/install.sh
+++ b/install.sh
@@ -53,23 +53,32 @@ if [[ ":${PATH}:" != *":${BIN_DIR}:"* ]]; then
    echo ""
    echo "WARNING: ${BIN_DIR} is not in your PATH"

-    # Detect shell config file
+    # Detect shell and set config files
    if [ -n "$ZSH_VERSION" ]; then
        RC_FILE="$HOME/.zshrc"
+        PROFILE_FILE="$HOME/.zprofile"
    else
        RC_FILE="$HOME/.bashrc"
+        PROFILE_FILE="$HOME/.profile"
    fi

    # Idempotent add: check if complete export statement already exists
    EXPORT_LINE="export PATH=\"${BIN_DIR}:\$PATH\""
-    if [ -f "$RC_FILE" ] && grep -qF "${EXPORT_LINE}" "$RC_FILE" 2>/dev/null; then
-        echo "  ${BIN_DIR} already in ${RC_FILE}, skipping."
-    else
-        echo "  Adding to ${RC_FILE}..."
-        echo "" >> "$RC_FILE"
-        echo "# Added by myclaude installer" >> "$RC_FILE"
-        echo "export PATH=\"${BIN_DIR}:\$PATH\"" >> "$RC_FILE"
-        echo "  Done. Run 'source ${RC_FILE}' or restart shell."
-    fi
+    FILES_TO_UPDATE=("$RC_FILE" "$PROFILE_FILE")
+
+    for FILE in "${FILES_TO_UPDATE[@]}"; do
+        if [ -f "$FILE" ] && grep -qF "${EXPORT_LINE}" "$FILE" 2>/dev/null; then
+            echo "  ${BIN_DIR} already in ${FILE}, skipping."
+        else
+            echo "  Adding to ${FILE}..."
+            echo "" >> "$FILE"
+            echo "# Added by myclaude installer" >> "$FILE"
+            echo "${EXPORT_LINE}" >> "$FILE"
+        fi
+    done
+
+    echo "  Done. Restart your shell or run:"
+    echo "    source ${PROFILE_FILE}"
+    echo "    source ${RC_FILE}"
    echo ""
 fi
--- a/requirements-driven-workflow/.claude-plugin/marketplace.json
+++ b/requirements-driven-workflow/.claude-plugin/marketplace.json
@@ -1,33 +0,0 @@
-{
-  "name": "requirements-driven-development",
-  "source": "./",
-  "description": "Streamlined requirements-driven development workflow with 90% quality gates for practical feature implementation",
-  "version": "1.0.0",
-  "author": {
-    "name": "Claude Code Dev Workflows",
-    "url": "https://github.com/cexll/myclaude"
-  },
-  "homepage": "https://github.com/cexll/myclaude",
-  "repository": "https://github.com/cexll/myclaude",
-  "license": "MIT",
-  "keywords": [
-    "requirements",
-    "workflow",
-    "automation",
-    "quality-gates",
-    "feature-development",
-    "agile",
-    "specifications"
-  ],
-  "category": "workflows",
-  "strict": false,
-  "commands": [
-    "./commands/requirements-pilot.md"
-  ],
-  "agents": [
-    "./agents/requirements-generate.md",
-    "./agents/requirements-code.md",
-    "./agents/requirements-testing.md",
-    "./agents/requirements-review.md"
-  ]
-}
--- a/requirements-driven-workflow/.claude-plugin/plugin.json
+++ b/requirements-driven-workflow/.claude-plugin/plugin.json
@@ -0,0 +1,9 @@
+{
+  "name": "requirements",
+  "description": "Requirements-driven development workflow with quality gates for practical feature implementation",
+  "version": "5.6.1",
+  "author": {
+    "name": "cexll",
+    "email": "cexll@cexll.com"
+  }
+}
--- a/skills/browser/SKILL.md
+++ b/skills/browser/SKILL.md
@@ -0,0 +1,73 @@
+---
+name: browser
+description: This skill should be used for browser automation tasks using Chrome DevTools Protocol (CDP). Triggers when users need to launch Chrome with remote debugging, navigate pages, execute JavaScript in browser context, capture screenshots, or interactively select DOM elements. No MCP server required.
+---
+
+# Browser Automation
+
+Minimal Chrome DevTools Protocol (CDP) helpers for browser automation without MCP server setup.
+
+## Setup
+
+Install dependencies before first use:
+
+```bash
+npm install --prefix ~/.claude/skills/browser/browser ws
+```
+
+## Scripts
+
+All scripts connect to Chrome on `localhost:9222`.
+
+### start.js - Launch Chrome
+
+```bash
+scripts/start.js              # Fresh profile
+scripts/start.js --profile    # Use persistent profile (keeps cookies/auth)
+```
+
+### nav.js - Navigate
+
+```bash
+scripts/nav.js https://example.com        # Navigate current tab
+scripts/nav.js https://example.com --new  # Open in new tab
+```
+
+### eval.js - Execute JavaScript
+
+```bash
+scripts/eval.js 'document.title'
+scripts/eval.js '(() => { const x = 1; return x + 1; })()'
+```
+
+Use single expressions or IIFE for multiple statements.
+
+### screenshot.js - Capture Screenshot
+
+```bash
+scripts/screenshot.js
+```
+
+Returns `{ path, filename }` of saved PNG in temp directory.
+
+### pick.js - Visual Element Picker
+
+```bash
+scripts/pick.js "Click the submit button"
+```
+
+Returns element metadata: tag, id, classes, text, href, selector, rect.
+
+## Workflow
+
+1. Launch Chrome: `scripts/start.js --profile` for authenticated sessions
+2. Navigate: `scripts/nav.js <url>`
+3. Inspect: `scripts/eval.js 'document.querySelector(...)'`
+4. Capture: `scripts/screenshot.js` or `scripts/pick.js`
+5. Return gathered data
+
+## Key Points
+
+- All operations run locally - credentials never leave the machine
+- Use `--profile` flag to preserve cookies and auth tokens
+- Scripts return structured JSON for agent consumption
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
NieiR	669b1d82ce	fix(gemini): read GEMINI_MODEL from ~/.gemini/.env (#131 ) When using gemini backend without --model flag, now automatically reads GEMINI_MODEL from ~/.gemini/.env file, consistent with how claude backend reads model from settings.	2026-01-23 12:03:50 +08:00
cexll	a21c31fd89	feat: add feature-dev skill with 7-phase workflow Structured feature development with codeagent orchestration: - Discovery, Exploration, Clarification, Architecture phases - Implementation, Review, Summary phases - Parallel agent execution via code-explorer, code-architect, etc. - Hook-based workflow automation with validation scripts Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-23 12:01:31 +08:00
cexll	773f133111	chore: ignore references directory Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-23 12:01:04 +08:00
cexll	4f5d24531c	feat(install): support \${CLAUDE_PLUGIN_ROOT} variable in hooks config - find_module_hooks now returns (hooks_config, plugin_root_path) tuple - Add _replace_hook_variables() for recursive placeholder substitution - Add feature-dev module config to config.json Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-23 12:00:55 +08:00
cexll	cc24d43c8b	fix(codeagent): validate non-empty output message before printing Return exit code 1 when backend returns empty result.Message with exit_code=0. Prevents silent failures where no output is produced. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-23 12:00:47 +08:00
cexll	27d4ac8afd	chore: add go.work.sum for workspace dependencies Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-23 12:00:38 +08:00
cexll	2e5d12570d	fix: add missing cmd/codeagent/main.go entry point Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-20 17:45:50 +08:00
cexll	7c89c40e8f	fix(ci): update release workflow build path for new directory structure Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-20 17:42:10 +08:00
cexll	fa617d1599	refactor: restructure codebase to internal/ directory with modular architecture - Move all source files to internal/{app,backend,config,executor,logger,parser,utils} - Integrate third-party libraries: zerolog, goccy/go-json, gopsutil, cobra/viper - Add comprehensive unit tests for utils package (94.3% coverage) - Add performance benchmarks for string operations - Fix error display: cleanup warnings no longer pollute Recent Errors - Add GitHub Actions CI workflow - Add Makefile for build automation - Add README documentation Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-20 17:34:26 +08:00
cexll	90c630e30e	fix: write PATH config to both profile and rc files (#128 ) Previously install.sh only wrote PATH to ~/.bashrc (or ~/.zshrc), which doesn't work for non-interactive login shells like `bash -lc` used by Claude Code, because Ubuntu's ~/.bashrc exits early for non-interactive shells. Now writes to both: - bash: ~/.bashrc + ~/.profile - zsh: ~/.zshrc + ~/.zprofile Each file is checked independently for idempotency. Closes #128 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-17 22:22:41 +08:00
cexll	25bbbc32a7	feat: add course module with dev, product-requirements and test-cases skills Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-17 16:28:59 +08:00
cexll	d8304bf2b9	feat: add hooks management to install.py - Add merge_hooks_to_settings: merge module hooks into settings.json - Add unmerge_hooks_from_settings: remove module hooks from settings.json - Add find_module_hooks: detect hooks.json in module directories - Update execute_module: auto-merge hooks after install - Update uninstall_module: auto-remove hooks on uninstall - Add __module__ marker to track hook ownership Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-17 14:16:16 +08:00
cexll	7240e08900	feat: add sparv module and interactive plugin manager - Add sparv module to config.json (SPARV workflow v1.1) - Disable essentials module by default - Add --status to show installation status of all modules - Add --uninstall to remove installed modules - Add interactive management mode (install/uninstall via menu) - Add filesystem-based installation detection - Support both module numbers and names in selection - Merge install status instead of overwriting Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-17 13:38:52 +08:00
cexll	e122d8ff25	feat: add sparv enhanced rules v1.1 - Add Uncertainty Declaration (G3): declare assumptions when score < 2 - Add Requirement Routing: Quick/Full mode based on scope - Add Context Acquisition: optional kb.md check before Specify - Add Knowledge Base: .sparv/kb.md for cross-session patterns - Add changelog-update.sh: maintain CHANGELOG by type Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-17 13:12:43 +08:00
马雨	6985a30a6a	docs: update 'Agent Hierarchy' model for frontend-ui-ux-engineer and document-writer in README (#127 ) * docs: update mappings for frontend-ui-ux-engineer and document-writer in README * docs: update 'Agent Hierarchy' model for frontend-ui-ux-engineer and document-writer in README	2026-01-17 12:32:32 +08:00
马雨	dd4c12b8e2	docs: update mappings for frontend-ui-ux-engineer and document-writer in README (#126 )	2026-01-17 12:04:12 +08:00
cexll	a88315d92d	feat: add sparv skill to claude-plugin v1.1.0 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-16 22:26:31 +08:00
cexll	d1f13b3379	remove .sparv	2026-01-16 14:35:11 +08:00
cexll	5d362852ab	feat sparv skill	2026-01-16 14:34:03 +08:00
cexll	238c7b9a13	fix(codeagent-wrapper): remove extraneous dash arg for opencode stdin mode (#124 ) opencode does not support "-" as a stdin marker like codex/claude/gemini. When using stdin mode, omit the "-" argument so opencode reads from stdin without an unrecognized positional argument. Closes #124 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-16 10:30:38 +08:00
cexll	0986fa82ee	update readme	2026-01-16 09:39:55 +08:00
cexll	a989ce343c	fix(codeagent-wrapper): correct default models for oracle and librarian agents (#120 ) - oracle: claude-sonnet-4-20250514 → claude-opus-4-5-20251101 - librarian: claude-sonnet-4-5-20250514 → claude-sonnet-4-5-20250929 Fixes #120 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-16 09:37:39 +08:00
cexll	abe0839249	feat dev skill	2026-01-15 15:31:14 +08:00
cexll	d75c973f32	fix(codeagent-wrapper): filter codex 0.84.0 stderr noise logs (#122 ) - Add skills loader error pattern to codex noise filter - Update CHANGELOG for v5.6.4 Fixes #122 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-15 15:22:25 +08:00
cexll	e7f329940b	fix(codeagent-wrapper): filter codex stderr noise logs Add codexNoisePatterns to filter "ERROR codex_core::codex: needs_follow_up:" messages from stderr output when using the codex backend. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-15 14:59:31 +08:00
cexll	0fc5eaaa2d	fix: update version tests to match 5.6.3 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 17:26:21 +08:00
cexll	420eb857ff	chore: bump codeagent-wrapper version to 5.6.3 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 17:14:06 +08:00
cexll	661656c587	fix(codeagent-wrapper): use config override for codex reasoning effort Replace invalid `--reasoning-effort` CLI flag with `-c model_reasoning_effort=<value>` config override, as codex does not support the former. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 17:04:21 +08:00
cexll	ed4b088631	docs: add OmO workflow to README and fix plugin marketplace structure - Add OmO multi-agent orchestrator documentation to README.md and README_CN.md - Fix marketplace.json to follow official Claude Code plugin schema - Add $schema field and move version/description to top level - Create proper .claude-plugin/plugin.json for all plugins - Remove non-standard marketplace.json from plugin subdirectories - Simplify plugin names: omo, dev, requirements, bmad, essentials Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 14:29:15 +08:00
cexll	55a574280a	fix(codeagent-wrapper): propagate SkipPermissions to parallel tasks (#113 ) Parallel task execution was not inheriting the --skip-permissions flag, causing permission prompts to appear for parallel tasks while single tasks worked correctly. Changes: - Add SkipPermissions field to TaskSpec struct - Parse skip_permissions/skip-permissions in parallel task config - Inherit SkipPermissions from CLI args to parallel tasks - Pass SkipPermissions when creating task Config in executor Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 11:50:36 +08:00
cexll	8f05626075	fix(codeagent-wrapper): add timeout for Windows process termination - Add forceKillWaitTimeout (5s) to prevent cmd.Wait() blocking forever - Enhance sendTermSignal with killProcessTree fallback using wmic - Update omo README: remove sisyphus, fix model names, update config Fixes #115 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 10:43:25 +08:00
NieiR	4395c5785d	fix(codeagent-wrapper): reject dash as workdir parameter (#118 ) Prevent '-' from being incorrectly parsed as a workdir path. This fixes a potential ambiguity when using stdin mode.	2026-01-14 10:04:23 +08:00
cexll	b0d7a09ff2	refactor(codeagent-wrapper): remove sisyphus agent and unused code - Remove sisyphus agent from default config (references deleted sisyphus.md) - Clean up unused variables: useASCIIMode, jsonMarshal - Remove unused type: codexHeader - Remove unused functions: extractMessageSummary, extractKeyOutput, extractTaskBlock - Update tests to reflect 6 default agents instead of 7 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-14 10:01:23 +08:00
cexll	f7aeaa5c7e	fix(codeagent-wrapper): add sleep in fake script to prevent CI race condition Add 50ms sleep in createFakeCodexScript to ensure parser goroutine has time to read stdout before the process exits. Fixes TestRun_ExplicitStdinSuccess flaky failure on Linux CI where fast shell execution closes pipe prematurely. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 22:56:05 +08:00
cexll	c8f75faf84	fix gemini env load	2026-01-13 22:40:49 +08:00
cexll	b8b06257ff	feat(codeagent-wrapper): add reasoning effort config for codex backend - Add --reasoning-effort CLI flag for codex model thinking intensity - Support reasoning config in ~/.codeagent/models.json per agent - CLI flag takes precedence over config file - Only effective for codex backend Closes #117 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 22:38:38 +08:00
cexll	369a3319f9	fix omo	2026-01-13 19:28:37 +08:00
cexll	75f08ab81f	docs: update FAQ for default bypass/skip-permissions behavior Reflect that codeagent-wrapper now enables bypass mode by default. Document how to disable if permission prompts are needed. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 17:38:19 +08:00
cexll	23282ef460	refactor(omo): streamline agent documentation and remove sisyphus - Simplify SKILL.md with cleaner agent definitions - Update agent reference docs (develop, explore, librarian, oracle, etc.) - Remove deprecated sisyphus agent - Improve README with updated usage examples Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 17:38:02 +08:00
cexll	c7cb28a1da	feat(codeagent-wrapper): default to skip-permissions and bypass-sandbox - Claude: enable --dangerously-skip-permissions by default (set CODEAGENT_SKIP_PERMISSIONS=false to disable) - Codex: enable --dangerously-bypass-approvals-and-sandbox by default (set CODEX_BYPASS_SANDBOX=false to disable) - Gemini: use positional argument instead of deprecated -p flag (except for stdin mode) - Add envFlagDefaultTrue helper for default-true env flags Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 17:37:44 +08:00
cexll	0a4982e96d	feat(installer): add omo module for multi-agent orchestration Add omo skill as installable module with Sisyphus coordinator and specialized agents (oracle, librarian, explore, frontend-ui-ux-engineer, document-writer, develop). Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-13 00:08:18 +08:00
cexll	17e52d78d2	feat(codeagent-wrapper): add multi-agent support with yolo mode - Add --agent parameter for agent-based backend/model resolution - Add --prompt-file parameter for agent prompt injection - Add opencode backend support with JSON output parsing - Add yolo field in agent config for auto-enabling dangerous flags - claude: --dangerously-skip-permissions - codex: --dangerously-bypass-approvals-and-sandbox - Add develop agent for code development tasks - Add omo skill for multi-agent orchestration with Sisyphus coordinator - Bump version to 5.5.0 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-12 14:11:15 +08:00
cexll	55246ce9c4	Merge branch 'master' of github.com:cexll/myclaude	2026-01-09 11:56:40 +08:00
cexll	890fec81bf	fix codeagent skill TaskOutput	2026-01-09 11:56:35 +08:00
makoMako	81f298c2ea	fix(parser): 修复 Gemini init 事件 session_id 未提取的问题 (#111 ) Gemini CLI 的 session_id 出现在 init 事件中，但 parser 的 isGemini 判定条件只检查 role/delta/status 字段，导致 init 事件被当作 "Unknown event" 忽略，session_id 无法提取。修复方案：在 isGemini 条件中增加对 init 事件的识别。 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude <noreply@anthropic.com>	2026-01-08 14:52:58 +08:00
cexll	8ea6d10be5	add test-cases skill	2026-01-08 11:34:25 +08:00
cexll	bdf62d0f1c	add browser skill	2026-01-08 11:33:19 +08:00
makoMako	40e2d00d35	修复 Windows 后端退出：taskkill 结束进程树 + turn.completed 支持 (#108 ) * fix(executor): handle turn.completed and terminate process tree on Windows * fix: 修复代码审查发现的安全和资源泄漏问题修复内容： 1. Windows 测试 taskkill 副作用：fake process 在 Windows 上返回 Pid()==0，避免真实执行 taskkill 2. taskkill PATH 劫持风险：使用 SystemRoot 环境变量构建绝对路径 3. stdinPipe 资源泄漏：在 StdoutPipe() 和 Start() 失败路径关闭 stdinPipe 4. stderr drain 并发语义：移除 500ms 超时，确保 drain 完成后再访问共享缓冲测试验证： - go test ./... -race 通过 - TestRunCodexTask_ForcesStopAfterTurnCompleted 通过 - TestExecutorSignalAndTermination 通过 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai> --------- Co-authored-by: cexll <evanxian9@gmail.com> Co-authored-by: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-08 10:33:09 +08:00
cexll	13465b12e5	fix: support model parameter for all backends, auto-inject from settings (#105 ) - Add Model field to Config and TaskSpec for per-task model selection - Parse --model flag and model: metadata in parallel tasks - Auto-inject model from ~/.claude/settings.json for claude backend in new mode - Pass --model to claude CLI, -m to gemini CLI, --model to codex CLI - Preserve --setting-sources "" isolation while reading minimal safe subset - Add comprehensive tests for model parsing, propagation, and settings injection Fixes #105 Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-06 15:03:21 +08:00
cexll	cf93a0ada9	feat skill-install install script and security scan	2026-01-05 21:02:07 +08:00
cexll	b81953a1d7	feat: add uninstall scripts with selective module removal - uninstall.py: Python uninstaller with --list, --dry-run, --module options - uninstall.sh: Bash uninstaller with same functionality - Reads installed_modules.json for precise removal - Supports partial uninstall (--module dev) - --purge option for complete removal - Cleans PATH from shell configs (.bashrc/.zshrc) Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-04 22:53:11 +08:00
cexll	1d2f28101a	docs: add FAQ Q5 for permission/sandbox env vars Add CODEX_BYPASS_SANDBOX and CODEAGENT_SKIP_PERMISSIONS environment variables to FAQ section in both EN and CN READMEs. Generated with SWE-Agent.ai Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>	2026-01-04 10:13:58 +08:00