Agent Setup Health Audit
tw93/Waza
Audits a project's agent configuration, instruction drift, hooks, MCP and AI maintainability, then reports prioritized findings with evidence and next actions.
Explains how the Codex Rules plugin injects project instructions and file-specific rules into a session, which rule files it reads and which settings control it.
Install Codex Rules Reference
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install code-yeongyu/oh-my-openagent rules --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .claude/skills/rules && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .claude/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rulesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install code-yeongyu/oh-my-openagent rules --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .agents/skills/rules && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .agents/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install code-yeongyu/oh-my-openagent rules --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .cursor/skills/rules && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .cursor/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/code-yeongyu/oh-my-openagent.git --path packages/omo-codex/plugin/components/rules/skills/rules--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install code-yeongyu/oh-my-openagent rules --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .gemini/skills/rules && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .gemini/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install code-yeongyu/oh-my-openagent rulesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .github/skills/rules && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .github/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add code-yeongyu/oh-my-openagent --skill rules -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install code-yeongyu/oh-my-openagent rules --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/code-yeongyu/oh-my-openagent.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/omo-codex/plugin/components/rules/skills/rules .opencode/skills/rules && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "rules" agent skill from https://github.com/code-yeongyu/oh-my-openagent/tree/dev/packages/omo-codex/plugin/components/rules/skills/rules into .opencode/skills/rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rules", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
rules- GitHub stars
- 70k
- Token cost
- ~269 tokens
- SKILL.md length
- 80 words
- Files
- 1
- Skills in repo
- 45
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Explains how the Codex Rules plugin injects project instructions and file-specific rules into a session, which rule files it reads and which settings control it.
- Finding out which rule files Codex Rules reads
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Turning rule injection off or limiting it with environment variables
- Working out why a file-specific rule did or did not appear after a patch
What it does
Once the plugin is enabled, Codex Rules works automatically. It injects static project instructions at `SessionStart` and `UserPromptSubmit`, and by default adds matching file-specific rules after a Codex `apply_patch`. Dynamic `PostToolUse` output is passed in as extra context and deduplicated per plugin data session. The plugin does not rewrite tool output.
Rules are read from `CONTEXT.md`, `.omo/rules`, `.claude/rules`, `.cursor/rules`, `.github/instructions` and `.github/copilot-instructions.md`. Behavior is tuned with `CODEX_RULES_` variables: one to disable the plugin, a mode with the values both, static, dynamic or off, limits on rule and result length, and a list of enabled sources. Older `PI_RULES_` variables still work as fallbacks for people moving from `pi-rules`.
When your agent uses it
- Finding out which rule files Codex Rules reads
- Turning rule injection off or limiting it with environment variables
- Working out why a file-specific rule did or did not appear after a patch
Example prompts
- “Which folders does Codex Rules read project rules from?”
- “Set Codex Rules to static mode so rules are only injected at session start.”
- “Why wasn't my .cursor rule injected after the last apply_patch?”
Requirements
- The Codex Rules plugin, enabled
What it can do on your machine
Read from SKILL.md and the folder at commit ab81169. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Codex Rules Reference loads about 269 tokens when it runs. Until then it costs about 38 tokens; SKILL.md has 80 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 80 words (~269 tokens).
“Codex Rules is automatic once the plugin is enabled. It injects:”
- name
- rules
Files
Just SKILL.md in packages/omo-codex/plugin/components/rules/skills/rules of code-yeongyu/oh-my-openagent.
Open the folder on GitHubat commit ab81169
Used in 1 other repository
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in code-yeongyu/oh-my-openagent, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Codex Rules Reference next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Codex Rules Reference this skillcode-yeongyu/oh-my-openagent | 70k | — | ~269 | Automated safety check: Pass | Custom licence | |
| Agent Setup Health Audittw93/Waza | 7.2k | — | ~5.2k | Automated safety check: Notes | MIT | |
| Working With Claude Code Docsobra/superpowers-developing-for-claude-code | 142 | — | ~1.5k | Automated safety check: Pass | None | |
| Directional Promptingkingbootoshi/directional-prompting | 143 | — | ~2.3k | Automated safety check: Pass | MIT | |
| Agenticashibing624/agentica | 352 | — | ~1.8k | Automated safety check: Notes | Apache-2.0 | |
| Claude Code Mastery Squadohmyjahh/xquads-squads | 276 | — | ~1.1k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Codex Rules Reference
What does Codex Rules Reference do?
Explains how the Codex Rules plugin injects project instructions and file-specific rules into a session, which rule files it reads and which settings control it. Once the plugin is enabled, Codex Rules works automatically. It injects static project instructions at `SessionStart` and `UserPromptSubmit`, and by default adds matching file-specific rules after a Codex `apply_patch`.
When should I use Codex Rules Reference?
Codex Rules Reference fits situations like: finding out which rule files Codex Rules reads; turning rule injection off or limiting it with environment variables; working out why a file-specific rule did or did not appear after a patch.
How do I install Codex Rules Reference in Claude Code?
Run `npx skills add code-yeongyu/oh-my-openagent --skill rules -a claude-code`. Or copy the skill folder (packages/omo-codex/plugin/components/rules/skills/rules in code-yeongyu/oh-my-openagent) into .claude/skills/rules in your project. Claude Code loads it when a task matches its description.
How do I install Codex Rules Reference in Codex?
Run `npx skills add code-yeongyu/oh-my-openagent --skill rules -a codex`. Or copy the skill folder (packages/omo-codex/plugin/components/rules/skills/rules in code-yeongyu/oh-my-openagent) into .agents/skills/rules in your project. Codex loads it when a task matches its description.
Can I use Codex Rules Reference in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add code-yeongyu/oh-my-openagent --skill rules -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rules, .gemini/skills/rules, .github/skills/rules and .opencode/skills/rules in your project.
What does Codex Rules Reference need to run?
SKILL.md names no scripts, command-line tools or credentials: Codex Rules Reference is instructions for the agent only. Our summary lists: The Codex Rules plugin, enabled.
Does Codex Rules Reference access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Codex Rules Reference safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Codex Rules Reference use?
Codex Rules Reference has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Codex Rules Reference use?
About 269 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Codex Rules Reference?
Skills that share tags, products or a category with Codex Rules Reference: Agent Setup Health Audit (tw93/Waza, 7.2k stars), Working With Claude Code Docs (obra/superpowers-developing-for-claude-code, 142 stars), Directional Prompting (kingbootoshi/directional-prompting, 143 stars) and Agentica (shibing624/agentica, 352 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Codex Rules Reference?
code-yeongyu (a GitHub user) maintains it in code-yeongyu/oh-my-openagent, which has 69,882 GitHub stars. The repository holds 45 skills in this directory. The repository was last updated on October 8, 2026.
Source: code-yeongyu/oh-my-openagent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.