diff --git a/skills/codex/SKILLS.md b/skills/codex/SKILLS.md
new file mode 100644
index 0000000..865e4e2
--- /dev/null
+++ b/skills/codex/SKILLS.md
@@ -0,0 +1,78 @@
+---
+name: codex
+description: Execute Codex CLI for code analysis, refactoring, and automated code changes. Use when you need to delegate complex code tasks to Codex AI with file references (@syntax) and structured output.
+---
+
+# Codex CLI Integration
+
+## Overview
+
+Execute Codex CLI commands and parse structured JSON responses. Supports file references via `@` syntax, multiple models, and sandbox controls.
+
+## When to Use
+
+- Complex code analysis requiring deep understanding
+- Large-scale refactoring across multiple files
+- Automated code generation with safety controls
+- Tasks requiring specialized reasoning models (o3, gpt-5)
+
+## Usage
+
+```bash
+bash scripts/codex.sh "<task>" [model] [working_dir]
+```
+
+**Timeout**: Set `timeout: 7200000` (2 hours) in Bash tool for long tasks.
+
+### Parameters
+
+- `task` (required): Task description, supports `@file` references
+- `model` (optional): Model to use (default: gpt-5-codex)
+  - `gpt-5-codex`: Default, optimized for code
+  - `gpt-5`: Fast general purpose
+  - `o3`: Deep reasoning
+  - `o4-mini`: Quick tasks
+  - `codex-1`: Software engineering
+- `working_dir` (optional): Working directory (default: current)
+
+### Return Format
+
+Extracts `agent_message` from Codex JSON stream:
+```
+Agent response text here...
+```
+
+Error format:
+```
+ERROR: Error message
+```
+
+### Examples
+
+**Basic code analysis:**
+```bash
+bash scripts/codex.sh "explain @src/main.ts"
+```
+
+**Refactoring with specific model:**
+```bash
+bash scripts/codex.sh "refactor @src/utils for performance" "gpt-5"
+```
+
+**Multi-file analysis:**
+```bash
+bash scripts/codex.sh "analyze @. and find security issues" "gpt-5-codex" "/path/to/project"
+```
+
+**Quick task:**
+```bash
+bash scripts/codex.sh "add comments to @utils.js" "gpt-5-codex"
+```
+
+## Notes
+
+- Runs with `--dangerously-bypass-approvals-and-sandbox` for automation
+- Uses `--skip-git-repo-check` to work in any directory
+- Streams progress, returns only final agent message
+- Requires Codex CLI installed and authenticated
+- Use `timeout: 7200000` (2 hours) for complex tasks that may take longer
diff --git a/skills/codex/scripts/codex.sh b/skills/codex/scripts/codex.sh
new file mode 100755
index 0000000..120792d
--- /dev/null
+++ b/skills/codex/scripts/codex.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+set -euo pipefail
+
+TASK="${1:-}"
+MODEL="${2:-gpt-5-codex}"
+WORKDIR="${3:-.}"
+
+if [ -z "$TASK" ]; then
+  echo "ERROR: Task required" >&2
+  exit 1
+fi
+
+codex e -m "$MODEL" --dangerously-bypass-approvals-and-sandbox --skip-git-repo-check -C "$WORKDIR" --json "$TASK" 2>/dev/null | \
+  jq -r 'select(.type == "item.completed" and .item.type == "agent_message") | .item.text' | \
+  tail -n 1