I've been using multiple AI coding assistants (Claude Code, Cursor, Codex, Copilot, Gemini CLI, Windsurf, etc.) over the past few months, and I noticed the same problem everywhere.
Every assistant has its own way of defining skills, rules, or prompts.
- Claude Code → Skills
- Cursor → Rules
- GitHub Copilot → Instructions
- Codex → AGENTS.md
- Windsurf → Workflows
- Others → Yet another format
If I build a useful skill for one assistant, I have to rewrite and maintain it separately for every other assistant.
That feels a lot like JavaScript before npm or containers before Docker.
So I started building Kitbash.
It's not another AI coding assistant.
The goal is to create an open standard for portable AI skills.
Some ideas I'm exploring:
- 📦 Write a skill once and compile it for multiple AI coding assistants.
- 🔒 Versioned installs with lockfiles instead of copying prompt files.
- 🧪 Testable skills with evaluation suites.
- 🔐 Permission manifests and context budgets.
- 🔄 Composable workflows where skills exchange typed artifacts instead of giant prompt chains.
- 🌍 A community ecosystem where anyone can publish reusable skills.
It's still pre-alpha, so I'm mainly looking for feedback on the architecture and whether this is actually a problem worth solving.
🌐 Landing Page:
I'd love to hear your thoughts.
- Is this solving a real pain point?
- What features would you expect from something like this?
- If you use multiple AI coding assistants, would you install a tool like this?
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