Codex Skills Library
61 small skills for Codex across 13 areas: codebase orientation, tests, migrations, security, CI and pull request review
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Minimal access
Why this level
- These are text instructions with no scripts of their own, but the agent runs git and test commands in your project because of them
Install
- Works in
Manual install
git clone https://github.com/proflead/codex-skills-library.gitThe README gives no dedicated install command: clone the repository and copy the folders you need from `skills/` into the Codex skills directory.
Access and checks
How we reviewMinimal accessThe tool runs nothing and makes no network calls.
- These are text instructions with no scripts of their own, but the agent runs git and test commands in your project because of them
This is third-party code. Review the repository files before installing.
What it does
The library splits typical developer tasks into separate Codex skills. Each skill sits in its own folder with a SKILL.md file: the header holds the name and description, the body a short procedure loaded on demand. A skill is triggered by an ordinary phrase, such as asking to make sense of an unfamiliar repository. Folders are grouped by area: foundation (codebase map, debugging checklist, error and log explainers, safe git commands), docs, testing, API, frontend, backend, data, infrastructure, security, performance, reliability, architecture and planning. They include checks of database migrations for lock risk, CI failure triage, a quick security scan, threat modelling, a dependency upgrade plan and pull request review ranked by severity. A separate buffer-api skill describes integrating with the Buffer GraphQL API. The .codex folder holds two more helpers: for prompt optimization and for writing.
Who it is for. Developers and small teams on Codex who are tired of explaining the debugging, review and testing routine to the agent every time.
Good fit when
- In an unfamiliar repository you need to find entry points and learn how to build and run it
- CI is failing and you want to tell flaky tests from real breakage
- A database migration must roll out without downtime and the lock risk is unknown
- Before a release you have to sweep auth, secrets and dependencies fast
- A pull request is reviewed with a severity rating for every remark
Not a fit when
- Work happens in Claude Code or Cursor: the library is built for Codex
- You need a deep skill for a specific framework, here each is short and general
- The team's rules already live in its own skills and duplicating them adds nothing
Example request
Make sense of this repository: show entry points, how to build and run it, and suggest a safe first taskLimitations
The skills are short and general: a skeleton of the procedure rather than knowledge of a specific framework or infrastructure. No licence is stated in the repository, so confirm it with the author before company use. There is no automatic install: the needed folders are copied by hand. Content and quality vary, a deep write-up like buffer-api appears once and the rest describe a process in a few lines. The changelog is kept in docs/CHANGELOG.md.
How to disable. Delete the skill's folder from the Codex skills directory. The repository can simply be erased, it adds nothing to the system.
FAQ
How do I install skills from Codex Skills Library?
Clone the repository with `git clone https://github.com/proflead/codex-skills-library.git` and copy the folders you need from `skills/` into the Codex skills directory, usually `~/.agents/skills/` or `.agents/skills/` in a project.
How do I trigger a skill?
Just describe the task in words: a skill attaches from its header description. Asking to find the cause of a CI failure, for example, raises the ci-failure-triage skill.
How many skills are there and in which areas?
The skills folder holds 61 skills across 13 areas, from foundations and docs to architecture and planning. Two more helpers for prompts and writing sit in `.codex/skills`.
Does the library suit Claude Code?
The SKILL.md format is shared, but the library is built and tested for Codex. In Claude Code you would copy the folders yourself and check the result.
Can I add my own skill to the library?
Yes. The README welcomes contributions: open an issue with an idea or send a pull request with a new skill or a fix to an existing one.
Discussion
No questions or reviews yet.
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README in short
The README describes a collection of small Codex skills grouped by area under the skills folder and lists 61 skills with one-line descriptions. It links to a step-by-step guide on the author's site and a video. Contributions are accepted through issues and pull requests.
README badge
Original SKILL.md
--- name: codebase-orientation description: Guide quick orientation of an unfamiliar codebase with module mapping, entry points, and local run steps. Use when a junior developer needs to get situated fast. --- # Codebase Orientation ## Purpose Guide quick orientation of an unfamiliar codebase with module mapping, entry points, and local run steps. ## Inputs to request - Repo URL or local path and target area of interest. - Runtime versions, package manager, and OS. - Current task or reason for onboarding. ## Workflow 1. Locate entry points, build scripts, and main runtime paths. 2. Map key folders, ownership, and common naming conventions. 3. Identify how to run, test, and debug locally with minimal setup. 4. Call out one or two safe starter tasks for learning. ## Output - High-level module map with file paths. - Local run/test commands with prerequisites. - Suggested first change with low risk. ## Quality bar - Reference concrete file paths and commands. - Keep scope limited to the requested area.