feat: skill for github actions

[juanmichelini]

Create a skill for creating and working on github actions. Read other skills to get an idea of structure, and tone.

Things to consider:

When running a github action, there needs to be at least one version merged into main BUT once that exists you can test other branches before merging.

When creating an action from scratch, or when the problem is particularly tricky it is worth it to add a step before all steps that just prints non secret parameters. That way you can debug more easily.

Think about other tricky none obvious things to consider.

[juanmichelini]

@OpenHands this is a skill I would use a lot

[openhands-ai]

I'm on it! juanmichelini can track my progress at all-hands.dev

[openhands-ai]

Summary of Work Completed ✅

I've successfully created a comprehensive GitHub Actions skill for the OpenHands extensions repository, addressing all requirements from issue #55.

Changes Made

1. Created /skills/github-actions/SKILL.md (12.7 KB)

   • Complete guide for creating, testing, and debugging GitHub Actions workflows and custom actions
   • Critical guidance emphasized: Actions must be merged to main before first use
   • Debug best practice: Add debug steps to print non-secret parameters
   • 10 common pitfalls and non-obvious gotchas (permissions, secrets in fork PRs, workflow triggers, path filters, etc.)
   • Local testing with act, debugging techniques, and best practices

2. Created /skills/github-actions/README.md (7.1 KB)

   • Practical scenarios with step-by-step examples
   • Common use cases and advanced patterns
   • Related skills and external resources

3. Updated .plugin/marketplace.json

   • Registered the skill with category "integration" and appropriate keywords

Requirements Checklist

✅ Read other skills for structure and tone (reviewed github, docker, vercel, gitlab skills)
✅ Emphasized that actions need one version merged to main before testing other branches
✅ Included guidance about adding debug steps for printing non-secret parameters
✅ Covered tricky, non-obvious considerations (10 common pitfalls section)
✅ Followed skill authoring guidelines (progressive disclosure, actionable content)
✅ Tests pass (README validation, JSON validation)

Pull Request

PR #56: #56

• Branch: openhands/add-github-actions-skill
• Status: Ready for review
• Closes: feat: skill for github actions #55

The skill is production-ready and follows the same high-quality structure as existing skills in the repository! 🚀