Skills

Forget about MCP; use command-line tools and tailor context to the task at hand. Use with Codex or Claude Code.

Install

$ git clone git@github.com:bkircher/skills.git ~/.codex/skills

… or something like this. You can also clone somewhere else and symlink to the agent-specific directories.

Test

Start Codex like this:

$ codex --enable skills -m gpt-5.2

Then, when prompted:

> list skills

Should output something like:

• Available skills:

  - english-text-editor
  - gh-address-comments
  - gh-code-review
  - gh-run-failure
  - git-commit-message
  - jira-read-ticket
  - skill-creator
  - skill-installer

Use with Codex

Skills are still a work in progress (as of Codex 0.72.0). Run Codex with: codex --enable skills. For example:

$ codex --enable skills -m gpt-5.2-codex -s workspace-write -a on-request

Tested with:

$ codex --version
codex-cli 0.72.0

Use with Claude Code

Claude Code does skills out of the box. Make sure they are installed, e.g.,

$ cd ~/.claude
$ ln -s $HOME/.codex/skills skills

Then in Claude CLI:

> list skills

⏺ Here are the available skills:

  GitHub & Git:
  - gh-address-comments - Help address review/issue comments on the open GitHub PR for the current branch
  - gh-code-review - Conduct a thorough and in-depth code review for a PR on GitHub
  - gh-run-failure - Analyze failures in GitHub pipelines or jobs
  - git-commit-message - Formulate a git commit message

  Text & Documentation:
  - english-text-editor - Suggests improvements for English language text (spelling, wording)

  Project Management:
  - jira-read-ticket - Read Jira ticket description, comments, and details

  You can invoke any skill using the / prefix, for example: /gh-code-review or /git-commit-message

List of skills

List of skills:

Skill	Description
english-text-editor	Suggests improvements for English language text but does not rewrite the original. Use when asked to correct spelling or wording and the text is English.
git-commit-message	Formulate a git commit message. Use this skill whenever asked to create a commit message.
gh-address-comments	Help address review/issue comments on the open GitHub PR for the current branch using gh CLI; verify gh auth first and prompt the user to authenticate if not logged in. Source
gh-code-review	Conduct a thorough and in-depth code review. Use this skill when conducting a code review for a PR on GitHub.
gh-run-failure	Use to analyze failures in GitHub pipelines or jobs.
jira-read-ticket	Use whenever a user mentions or references a Jira ticket and you want to pull out description, comments, or more.

Create your own skills

$ mkdir -p ~/.codex/skills/<my-name>
$ curl -fsSL \
    https://raw.githubusercontent.com/anthropics/skills/refs/heads/main/template/SKILL.md \
    -o ~/.codex/skills/<my-name>/SKILL.md

Links

General:

• https://agentskills.io/home
• https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview
• https://simonwillison.net/2025/Dec/12/openai-skills/
• https://github.com/anthropics/skills
• https://github.com/anthropics/claude-cookbooks/tree/main/skills
• https://developers.openai.com/codex/skills/

Prompting:

• https://cookbook.openai.com/examples/gpt-5/gpt-5-2_prompting_guide
• Prompt optimizer: https://platform.openai.com/chat/edit?models=gpt-5.2&optimize=true

Other skills:

• github.com/VoltAgent/awesome-claude-skills
• OpenAI curated set of skills: github.com/openai/skills

License

Unless otherwise noted, the license is MIT. Some skills copied from elsewhere have their own licenses.