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julien-workflow-advice-codex

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Get OpenAI Codex CLI's opinion on code, bugs, or implementation. Use when you want a second AI perspective during coding sessions.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name julien-workflow-advice-codex
description Get OpenAI Codex CLI's opinion on code, bugs, or implementation. Use when you want a second AI perspective during coding sessions.
triggers ask codex, codex opinion, codex review, what does codex think, demande à codex, avis de codex, codex pense quoi, get codex feedback, codex second opinion, openai codex review

Ask Codex

Get feedback from OpenAI's Codex CLI on code, bugs, or implementation approaches.

Prerequisites

  • Codex CLI installed: npm install -g @openai/codex
  • Authenticated: codex login or sign in with ChatGPT account
  • Verify: codex --version

When to Use

  • Want a second opinion on code quality
  • Need bug analysis
  • Code review before commit
  • Performance optimization suggestions

How to Invoke

The user will ask something like:

  • "ask codex what it thinks about this code"
  • "get codex's opinion on this implementation"
  • "fais reviewer ce fichier par codex"

Execution

For file review (non-interactive)

codex exec "Review <file_path> and provide 3 specific improvements for production"

For bug analysis

codex exec "Analyze <file_path> for potential bugs and edge cases"

For dedicated code review

codex review

Note: codex review opens an interactive review session - use codex exec for non-interactive feedback.

Output Format

Present Codex's response clearly to the user. If Codex suggests improvements, summarize them as actionable items.

Examples

File review

User: "demande à codex de reviewer le benchmark"

codex exec "Review scripts/benchmark-semantic-router.py for improvements and potential issues"

Bug analysis

User: "ask codex to find bugs in this file"

codex exec "Analyze scripts/semantic-skill-router.py for potential bugs, edge cases, and error handling gaps"

Troubleshooting

Error Cause Fix
codex: command not found CLI not installed npm install -g @openai/codex
Not authenticated Not logged in Run codex login
Model not available Account tier issue Check ChatGPT subscription
Response timeout Large codebase Use specific file path, not whole repo

Notes

  • Default model: GPT-5.1 Codex Max
  • Supports reasoning levels
  • codex exec for non-interactive (scripted) use
  • codex review for interactive review session
  • Timeout: allow up to 60s for response

Skill Chaining

Input Expected

  • File path to review, OR
  • Bug analysis request from user

Output Produced

  • Format: Markdown feedback from Codex
  • Side effects: None (read-only)

Compatible Skills

  • Can be used alongside julien-workflow-advice-gemini for multiple AI opinions
  • Use after writing code, before commit

Tools Used

  • Bash (usage: run codex CLI command, timeout 60s)