Agent skill
codex-qa
Use OpenAI Codex CLI to answer questions about code, analyze files, or perform read-only codebase exploration. Invoke this skill when the user asks to use Codex, wants a second opinion from another AI agent, or wants to compare Claude's answer with Codex's response.
Install this agent skill to your Project
npx add-skill https://github.com/FunnelEnvy/agents_webinar_demos/tree/main/.claude/skills/codex-qa
SKILL.md
Codex Q&A
Use OpenAI's Codex CLI to answer questions about the codebase.
Prerequisites
Codex CLI must be installed and configured:
npm install -g @openai/codex
# or
brew install --cask codex
An OpenAI API key must be configured (OPENAI_API_KEY environment variable or via codex initial setup).
Usage
Spawn the codex-qa subagent to handle the question:
Use the Task tool to spawn the codex-qa agent with the user's question.
The subagent will:
- Formulate a clear prompt for Codex
- Run
codex exec "question"in read-only mode - Return Codex's response
Direct Usage (without subagent)
If you prefer to run Codex directly:
codex exec "your question here"
Command Options
- Basic query:
codex exec "question" - With image:
codex -i image.png exec "question about image" - JSON output:
codex exec --json "question" - Longer timeout:
codex exec --timeout 300000 "complex question"
Common Use Cases
- Code explanation: "What does this function do?"
- Architecture questions: "How is the database layer structured?"
- Finding patterns: "Where is error handling implemented?"
- Code review: "Review this file for potential issues"
- Comparison: Get a second opinion on a code question
Notes
- Codex exec runs in read-only mode by default - it cannot modify files
- Activity streams to stderr, final answer goes to stdout
- For complex questions, use the subagent for better context isolation
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