Agent skill

Better Codex

by noobnooc in noobnooc/agent

Behavioral guardrails for Codex coding work based on common user complaints.

No licenceAuto-check passedDevelopment

Install Better Codex

skills CLI
$ npx skills add noobnooc/agent --skill better-codex -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install noobnooc/agent better-codex --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/noobnooc/agent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/better-codex .claude/skills/better-codex && rm -rf skills-src

Use ~/.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/

Facts

Skill name
better-codex
GitHub stars
1.4k
Token cost
~3.2k tokens
SKILL.md length
1,713 words
Files
2
Skills in repo
2
Repo updated
First seen
Licence
None found

At a glance

Behavioral guardrails for Codex coding work based on common user complaints.

  • Codex is asked to implement
  • SKILL.md covers Core Contract, Request Validation, Working With Files and Execution Behavior, plus 10 more sections
  • Calls git
  • Operate on a codebase and should avoid unsafe scope expansion

What it does

Better Codex is an agent skill from noobnooc/agent. Behavioral guardrails for Codex coding work based on common user complaints. Use when Codex is asked to implement, modify, debug, review, test, or operate on a codebase and should avoid unsafe scope expansion, stale edits, fake completion, brittle edits, shallow debugging, superficial patch-on fixes, one-off special-case code, short-term design choices that hurt maintainability, blindly following incorrect user assumptions, poor dependency choices, generic product or UI output, over-mocked tests, noisy approvals…

Its SKILL.md is about 3.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Development, covering Debugging. It works with Git. The repository describes itself as: My profile & the agent skills I created.

When your agent uses it

  • Codex is asked to implement
  • Operate on a codebase and should avoid unsafe scope expansion
  • Fake completion
  • Shallow debugging

Example prompts

  • “/better-codex”

What it can do on your machine

Read from SKILL.md and the folder at commit 1f594b5. 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

    Shell commands in SKILL.md call:

    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Better Codex loads about 3.2k tokens when it runs. Until then it costs about 157 tokens; SKILL.md has 1,713 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~157
When it runs · the whole SKILL.md, loaded when a task matches
~3.2k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,713 words (~3,205 tokens).

“Use these rules as a reliability overlay for codebase work. They convert recurring public complaints about Codex into prompt-fixable behavior. Do not cite the complaints during normal task execution; just follow the rules.”

— opening of SKILL.md by noobnooc
name
better-codex

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in skills/better-codex of noobnooc/agent.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit 1f594b5

Compare with similar skills

Better Codex 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.

Better Codex compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Better Codex this skillnoobnooc/agent1.4k—~3.2kAutomated safety check: PassNone
Debugging and Error Recoveryaddyosmani/agent-skills103k1 repos~2.6kAutomated safety check: PassMIT
Git History Bug Auditben-manes/caffeine18k—~3.3kAutomated safety check: PassApache-2.0
Leon Coding Agentleon-ai/leon18k—~1.1kAutomated safety check: PassMIT
Adk Setupgoogle/adk-python22k—~993Automated safety check: NotesApache-2.0
Debug Tuitrasta298/keifu811—~1.3kAutomated safety check: PassMIT

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Works with

Categories

Questions about Better Codex

What does Better Codex do?

Behavioral guardrails for Codex coding work based on common user complaints. Better Codex is an agent skill from noobnooc/agent. Behavioral guardrails for Codex coding work based on common user complaints.

When should I use Better Codex?

Better Codex fits situations like: Codex is asked to implement; operate on a codebase and should avoid unsafe scope expansion; fake completion; shallow debugging.

How do I install Better Codex in Claude Code?

Run `npx skills add noobnooc/agent --skill better-codex -a claude-code`. Or copy the skill folder (skills/better-codex in noobnooc/agent) into .claude/skills/better-codex in your project. Claude Code loads it when a task matches its description.

How do I install Better Codex in Codex?

Run `npx skills add noobnooc/agent --skill better-codex -a codex`. Or copy the skill folder (skills/better-codex in noobnooc/agent) into .agents/skills/better-codex in your project. Codex loads it when a task matches its description.

Can I use Better Codex 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 noobnooc/agent --skill better-codex -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/better-codex, .gemini/skills/better-codex, .github/skills/better-codex and .opencode/skills/better-codex in your project.

What does Better Codex need to run?

Going by SKILL.md and its folder, Better Codex needs the command-line tools its instructions call (git).

Does Better Codex access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Better Codex 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 Better Codex use?

No licence was found for Better Codex or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Better Codex use?

About 3.2k tokens (SKILL.md is roughly 13k 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 Better Codex?

Skills that share tags, products or a category with Better Codex: Debugging and Error Recovery (addyosmani/agent-skills, 103k stars), Git History Bug Audit (ben-manes/caffeine, 18k stars), Leon Coding Agent (leon-ai/leon, 18k stars) and Adk Setup (google/adk-python, 22k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Better Codex?

noobnooc (a GitHub user) maintains it in noobnooc/agent, which has 1,386 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on August 18, 2026.

Source: noobnooc/agent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.