codex
✓Invokes OpenAI Codex CLI for an independent second opinion from a different model family. Use when (1) reviewing plans, diffs, code, or architecture decisions before acting, (2) doing a fresh pass on code or an entire codebase for bugs, edge cases, or missing requirements, (3) sanity-checking work before sharing with users or stakeholders, (4) wanting a competing perspective on trade-offs or design choices.
Installation
SKILL.md
Use Codex to get an independent review from OpenAI's reasoning models.
Use codex exec for non-interactive execution. The prompt can be passed as an argument or piped via stdin.
Invokes OpenAI Codex CLI for an independent second opinion from a different model family. Use when (1) reviewing plans, diffs, code, or architecture decisions before acting, (2) doing a fresh pass on code or an entire codebase for bugs, edge cases, or missing requirements, (3) sanity-checking work before sharing with users or stakeholders, (4) wanting a competing perspective on trade-offs or design choices. Source: vinta/hal-9000.
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/vinta/hal-9000 --skill codex Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code or Cursor
Facts (cite-ready)
Stable fields and commands for AI/search citations.
- Install command
npx skills add https://github.com/vinta/hal-9000 --skill codex- Source
- vinta/hal-9000
- Category
- </>Dev Tools
- Verified
- ✓
- First Seen
- 2026-02-11
- Updated
- 2026-02-18
Quick answers
What is codex?
Invokes OpenAI Codex CLI for an independent second opinion from a different model family. Use when (1) reviewing plans, diffs, code, or architecture decisions before acting, (2) doing a fresh pass on code or an entire codebase for bugs, edge cases, or missing requirements, (3) sanity-checking work before sharing with users or stakeholders, (4) wanting a competing perspective on trade-offs or design choices. Source: vinta/hal-9000.
How do I install codex?
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/vinta/hal-9000 --skill codex Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code or Cursor
Where is the source repository?
https://github.com/vinta/hal-9000
Details
- Category
- </>Dev Tools
- Source
- skills.sh
- First Seen
- 2026-02-11