Individual skill

codex

Use when the user asks to run Codex CLI (codex exec, codex resume) or references OpenAI Codex for code analysis, refactoring, or automated editing

skills/codex/SKILL.md

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Last checked: Nov 6, 2026

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Repository stars (not skill ratings): 290
Repository last updated: Nov 4, 2026
License: MIT

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README.mddoc · 5,140 bytes
SKILL.mdcore · 8,389 bytes
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scripts/run_with_timeout.pyruns · 3,673 bytes

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# Codex Skill Guide

## Operating Contract
1. Run `codex --version` and `codex exec --help` first. Stop if Codex is unavailable, and only use flags shown by the installed CLI.
2. If the user did not specify a model or reasoning effort, use the installed default. Do not hardcode a model list; model names and supported reasoning levels change over time.
3. Select the smallest sandbox needed: `--sandbox read-only` for inspection and `--sandbox workspace-write` for requested local edits. Network access, extra writable roots, and broader modes are separate grants.
4. Assemble the command from supported options such as:
   - `-m, --model <MODEL>`
   - `--config model_reasoning_effort="<LEVEL>"`
   - `--sandbox <read-only|workspace-write|danger-full-access>`
   - `-C, --cd <DIR>`
   - `--add-dir <DIR>`
   - `--json`
   - `--ephemeral`