Ask Codex

Ask Codex

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

Prerequisites

Observability

First: At the start of execution, display:

🔧 Skill "julien-workflow-advice-codex" activated

• 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

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)