Skills you can drop into Claude Code and Codex
Free SKILL.md files for code review, tests, commit messages and more. Open one to copy or download it, then run it with a slash command.
Accessibility checker
Reviews pages or components for common accessibility problems such as missing alt text, poor contrast and keyboard traps. Use it when asking about accessibility.
For Claude Code
FreeAPI docs writer
Writes clear documentation for your API endpoints or public functions from the real code, and shows you a draft before saving it. Use it when asking for API docs.
For Claude Code
FreeBug reproducer
Turns a bug report into a reliable reproduction and a likely cause before any fix is made. Use it when you describe something that is broken and want it tracked down.
For Claude Code
FreeChangelog writer
Turns recent commits into friendly release notes grouped by what users will notice. Manual-only: run it with /changelog-writer.
For Claude Code
FreeCommit message writer
Reads your staged changes and proposes a clear commit message. Manual-only, so it runs when you type /commit-message-writer and never on its own.
For Claude Code
FreeDatabase migration helper
Drafts a database migration for a schema change using your project's own migration tool, and flags risks before anything is run. Manual-only: run it with /database-migration-helper.
For Claude Code
FreeDead code finder
Finds unused code, leftover files and clutter you can probably remove, and lists them with a confidence level. Manual-only: run it with /dead-code-finder.
For Claude Code
FreeDependency upgrade checker
Checks which dependencies are out of date and what to watch for before upgrading them. Manual-only: run it with /dependency-upgrade-checker.
For Claude Code
FreeError explainer
Takes an error message and explains it in plain English: what went wrong, the most likely cause, and the first thing to try.
For Claude Code
FreeExplain this codebase
Gives a newcomer a plain-English tour of a project: what it does, how it is laid out, and where to look first. Good for non-coders inheriting a site.
For Claude Code
FreePerformance checker
Looks for common causes of slow code or slow pages, such as repeated database queries, heavy loops and oversized assets, and suggests fixes in order of impact. Manual-only: run it with /performance-checker.
For Claude Code
FreePR reviewer
Reviews your uncommitted changes or a branch diff and reports risks, missing tests and unclear code, grouped by how serious they are.
For Claude Code
FreePR reviewer for Codex
A Codex skill that reviews your uncommitted changes or a branch diff and reports risks, missing tests and unclear code, grouped by how serious they are. Read-only: it never edits files.
For OpenAI Codex
FreeREADME writer
Drafts or improves a project README from what is actually in the repository. Use it when asking for a README or project documentation.
For Claude Code
FreeRefactor planner
Plans a safe, step-by-step refactor of a file or area before any code changes. Manual-only: run it with /refactor-planner.
For Claude Code
FreeSecurity checker
Scans your code for common security mistakes such as exposed secrets, unsafe input handling and risky settings, and reports them by severity. Manual-only: run it with /security-checker.
For Claude Code
FreeTest writer
Writes tests for a function or file using the testing tools your project already has, and runs them to check they pass.
For Claude Code
FreeTest writer for Codex
A Codex skill that writes tests for a function or file using the testing tools your project already has, and runs them to check they pass.
For OpenAI Codex