diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 46c86a8..0f543d6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -104,10 +104,38 @@ jobs:
           cp install.sh install.bat release/
           ls -la release/
 
+      - name: Extract release notes from CHANGELOG
+        id: extract_notes
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/v}
+
+          # Extract version section from CHANGELOG.md
+          awk -v ver="$VERSION" '
+            /^## [0-9]+\.[0-9]+\.[0-9]+ - / {
+              if (found) exit
+              if ($2 == ver) {
+                found = 1
+                next
+              }
+            }
+            found && /^## / { exit }
+            found { print }
+          ' CHANGELOG.md > release_notes.md
+
+          # Fallback to auto-generated if extraction failed
+          if [ ! -s release_notes.md ]; then
+            echo "⚠️ No release notes found in CHANGELOG.md for version $VERSION" > release_notes.md
+            echo "" >> release_notes.md
+            echo "## What's Changed" >> release_notes.md
+            echo "See commits in this release for details." >> release_notes.md
+          fi
+
+          cat release_notes.md
+
       - name: Create Release
         uses: softprops/action-gh-release@v2
         with:
           files: release/*
-          generate_release_notes: true
+          body_path: release_notes.md
           draft: false
           prerelease: false
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f86e44..deb8ab7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,131 @@
 # Changelog
 
-## 5.2.0 - 2025-12-11
-- PR #53: unified CLI version source in `codeagent-wrapper/main.go` and bumped to 5.2.0.
-- Added legacy `codex-wrapper` alias support (runtime detection plus `scripts/install.sh` symlink helper).
-- Updated documentation to reflect backend flag usage and new version output.
+## 5.2.0 - 2025-12-12
+
+### 🚀 Core Features
+
+#### Multi-Backend Support (codeagent-wrapper)
+- **Renamed**: `codex-wrapper` → `codeagent-wrapper` with pluggable backend architecture
+- **Three Backends**: Codex (default), Claude, Gemini via `--backend` flag
+- **Smart Parser**: Auto-detects backend JSON stream formats
+- **Session Resume**: All backends support `-r <session_id>` cross-session resume
+- **Parallel Execution**: DAG task scheduling with global and per-task backend configuration
+- **Concurrency Control**: `CODEAGENT_MAX_PARALLEL_WORKERS` env var limits concurrent tasks (max 100)
+- **Test Coverage**: 93.4% (backend.go 100%, config.go 97.8%, executor.go 96.4%)
+
+#### GitHub Workflow Automation
+- **`/gh-create-issue`**: Guided dialogue for structured issue creation
+- **`/gh-issue-implement`**: Full issue-to-PR lifecycle
+  - Issue analysis and requirements clarification
+  - Development execution via codeagent-wrapper
+  - Automated progress updates and PR creation
+- **`/dev`**: 6-step minimal dev workflow with mandatory 90% test coverage
+
+#### Hooks System
+- **UserPromptSubmit**: Auto-activate skills based on context
+- **PostToolUse**: Auto-validation/formatting after tool execution
+- **Stop**: Cleanup and reporting on session end
+- **Examples**: Skill auto-activation, pre-commit checks
+
+#### Skills System
+- **Auto-Activation**: `skill-rules.json` regex trigger rules
+- **codeagent skill**: Multi-backend wrapper integration
+- **Modular Design**: Easy to extend with custom skills
+
+#### Installation System Enhancements
+- **`merge_json` operation**: Auto-merge `settings.json` configuration
+- **Modular Installation**: `python3 install.py --module dev,gh`
+- **Verbose Logging**: `--verbose/-v` enables terminal real-time output
+- **Streaming Output**: `op_run_command` streams bash script execution
+
+### 📚 Documentation
+
+- `docs/architecture.md` (21KB): Architecture overview with ASCII diagrams
+- `docs/CODEAGENT-WRAPPER.md` (9KB): Complete usage guide
+- `docs/HOOKS.md` (4KB): Customization guide
+- `README.md`: Added documentation index, corrected default backend description
+
+### 🔧 Important Fixes
+
+#### codeagent-wrapper
+- Fixed Claude/Gemini backend `-C` (workdir) and `-r` (resume) parameter support (codeagent-wrapper/backend.go:80-120)
+- Corrected Claude backend permission flag logic `if cfg.SkipPermissions` (codeagent-wrapper/backend.go:95)
+- Fixed parallel mode startup banner duplication (codeagent-wrapper/main.go:184-194 removed)
+- Extract and display recent errors on abnormal exit `Logger.ExtractRecentErrors()` (codeagent-wrapper/logger.go:156)
+- Added task block index to parallel config error messages (codeagent-wrapper/config.go:245)
+- Refactored signal handling logic to avoid duplicate nil checks (codeagent-wrapper/main.go:290-305)
+- Removed binary artifacts from tracking (codeagent-wrapper, *.test, coverage.out)
+
+#### Installation Scripts
+- Fixed issue #55: `op_run_command` uses Popen + selectors for real-time streaming output
+- Fixed issue #56: Display recent errors instead of entire log
+- Changed module list header from "Enabled" to "Default" to avoid ambiguity
+
+#### CI/CD
+- Removed `.claude/` config file validation step (.github/workflows/ci.yml:45)
+- Updated version test case from 5.1.0 → 5.2.0 (codeagent-wrapper/main_test.go:23)
+
+#### Commands & Documentation
+- `gh-implement.md` → `gh-issue-implement.md` semantic naming
+- Fixed README example command: `/gh-implement` → `/gh-issue-implement`
+- Reverted `skills/codex/SKILL.md` to `codex-wrapper` for backward compatibility
+
+#### dev-workflow
+- Replaced Codex skill → codeagent skill throughout
+- Added UI auto-detection: backend tasks use codex, UI tasks use gemini
+- Corrected agent name: `develop-doc-generator` → `dev-plan-generator`
+
+### ⚙️ Configuration & Environment Variables
+
+#### New Environment Variables
+- `CODEAGENT_SKIP_PERMISSIONS`: Control permission check behavior
+  - Claude backend defaults to `--dangerously-skip-permissions` enabled, set to `true` to disable
+  - Codex/Gemini backends default to permission checks enabled, set to `true` to skip
+- `CODEAGENT_MAX_PARALLEL_WORKERS`: Parallel task concurrency limit (default: unlimited, recommended: 8, max: 100)
+
+#### Configuration Files
+- `config.json`: Added "gh" module definition
+- `config.schema.json`: Added `op_merge_json` schema validation
+
+### ⚠️ Breaking Changes
+
+**codex-wrapper → codeagent-wrapper rename**
+
+**Migration**:
+```bash
+python3 install.py --module dev --force
+```
+
+**Backward Compatibility**: `codex-wrapper/main.go` provides compatibility entry point
+
+### 📦 Installation
+
+```bash
+# Full install (dev + GitHub workflow)
+python3 install.py --module dev,gh
+
+# List all modules
+python3 install.py --list-modules
+
+# Verbose logging mode
+python3 install.py --module gh --verbose
+```
+
+### 🧪 Test Results
+
+✅ **All tests passing**
+- Overall coverage: 93.4%
+- Security scan: 0 issues (gosec)
+- Linting: Pass
+
+### 📄 Related PRs & Issues
+
+- PR #53: Enterprise Workflow with Multi-Backend Support
+- Issue #55: Installation script execution not visible
+- Issue #56: Unfriendly error logging on abnormal exit
+
+### 👥 Contributors
+
+- Claude Sonnet 4.5
+- Claude Opus 4.5
+- SWE-Agent-Bot
diff --git a/README.md b/README.md
index 7c429a3..e1ae054 100644
--- a/README.md
+++ b/README.md
@@ -7,21 +7,21 @@
 [![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)
 
-> AI-powered development automation with Claude Code + Codex collaboration
+> AI-powered development automation with multi-backend execution (Codex/Claude/Gemini)
 
-## Core Concept: Claude Code + Codex
+## Core Concept: Multi-Backend Architecture
 
-This system leverages a **dual-agent architecture**:
+This system leverages a **dual-agent architecture** with pluggable AI backends:
 
 | Role | Agent | Responsibility |
 |------|-------|----------------|
 | **Orchestrator** | Claude Code | Planning, context gathering, verification, user interaction |
-| **Executor** | Codex | Code editing, test execution, file operations |
+| **Executor** | codeagent-wrapper | Code editing, test execution (Codex/Claude/Gemini backends) |
 
 **Why this separation?**
 - Claude Code excels at understanding context and orchestrating complex workflows
-- Codex excels at focused code generation and execution
-- Together they provide better results than either alone
+- Specialized backends (Codex for code, Claude for reasoning, Gemini for prototyping) excel at focused execution
+- Backend selection via `--backend codex|claude|gemini` matches the model to the task
 
 ## Quick Start(Please execute in Powershell on Windows)
 
@@ -246,7 +246,7 @@ bash install.sh
 
 #### Windows
 
-Windows installs place `codex-wrapper.exe` in `%USERPROFILE%\bin`.
+Windows installs place `codeagent-wrapper.exe` in `%USERPROFILE%\bin`.
 
 ```powershell
 # PowerShell (recommended)
diff --git a/README_CN.md b/README_CN.md
index 4842fe0..b2c8f9d 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -4,21 +4,21 @@
 [![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)
 
-> AI 驱动的开发自动化 - Claude Code + Codex 协作
+> AI 驱动的开发自动化 - 多后端执行架构 (Codex/Claude/Gemini)
 
-## 核心概念：Claude Code + Codex
+## 核心概念：多后端架构
 
-本系统采用**双智能体架构**：
+本系统采用**双智能体架构**与可插拔 AI 后端：
 
 | 角色 | 智能体 | 职责 |
 |------|-------|------|
 | **编排者** | Claude Code | 规划、上下文收集、验证、用户交互 |
-| **执行者** | Codex | 代码编辑、测试执行、文件操作 |
+| **执行者** | codeagent-wrapper | 代码编辑、测试执行（Codex/Claude/Gemini 后端）|
 
 **为什么分离？**
 - Claude Code 擅长理解上下文和编排复杂工作流
-- Codex 擅长专注的代码生成和执行
-- 两者结合效果优于单独使用
+- 专业后端（Codex 擅长代码、Claude 擅长推理、Gemini 擅长原型）专注执行
+- 通过 `--backend codex|claude|gemini` 匹配模型与任务
 
 ## 快速开始（windows上请在Powershell中执行）
 
@@ -237,7 +237,7 @@ bash install.sh
 
 #### Windows 系统
 
-Windows 系统会将 `codex-wrapper.exe` 安装到 `%USERPROFILE%\bin`。
+Windows 系统会将 `codeagent-wrapper.exe` 安装到 `%USERPROFILE%\bin`。
 
 ```powershell
 # PowerShell（推荐）
diff --git a/install.bat b/install.bat
index 3640009..0fe6f0c 100644
--- a/install.bat
+++ b/install.bat
@@ -9,13 +9,13 @@ set "OS=windows"
 call :detect_arch
 if errorlevel 1 goto :fail
 
-set "BINARY_NAME=codex-wrapper-%OS%-%ARCH%.exe"
+set "BINARY_NAME=codeagent-wrapper-%OS%-%ARCH%.exe"
 set "URL=https://github.com/%REPO%/releases/%VERSION%/download/%BINARY_NAME%"
-set "TEMP_FILE=%TEMP%\codex-wrapper-%ARCH%-%RANDOM%.exe"
+set "TEMP_FILE=%TEMP%\codeagent-wrapper-%ARCH%-%RANDOM%.exe"
 set "DEST_DIR=%USERPROFILE%\bin"
-set "DEST=%DEST_DIR%\codex-wrapper.exe"
+set "DEST=%DEST_DIR%\codeagent-wrapper.exe"
 
-echo Downloading codex-wrapper for %ARCH% ...
+echo Downloading codeagent-wrapper for %ARCH% ...
 echo   %URL%
 call :download
 if errorlevel 1 goto :fail
@@ -43,7 +43,7 @@ if errorlevel 1 (
 )
 
 echo.
-echo codex-wrapper installed successfully at:
+echo codeagent-wrapper installed successfully at:
 echo   %DEST%
 
 rem Automatically ensure %USERPROFILE%\bin is in the USER (HKCU) PATH