Show HN: UberSKILLS – Open-source Workbench for building AI agent SKILLS

Agent Skills (SKILL.md files) are reusable instruction sets that teach code agents like Claude Code, GitHub Copilot, Cursor, and Windsurf how to perform specific tasks. Right now, creating them is entirely manual - you hand-write YAML frontmatter and markdown, with no way to preview, validate, or test before deploying.

uberSKILLS is an open-source web app that gives you an integrated authoring environment for Agent Skills:

- AI-assisted creation - describe what you want in plain English, get a complete SKILL.md draft - Structured editor - edit metadata, instructions, and file templates with real-time validation - Multi-model testing - test your skill against any model on OpenRouter (Claude, GPT-4, Gemini, Llama, etc.) with streaming responses and token metrics - One-click deploy - deploy to 8 agents: Antigravity, Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode, and Windsurf - Import/export - bulk-import existing skills from directories or zips, export as zip - Version history - every edit is versioned automatically

Get started with a single command, no setup required:

npx @uberskillsdev/uberskills

Tech stack: Next.js 15, TypeScript, SQLite + Drizzle ORM, Vercel AI SDK, shadcn/ui, Tailwind CSS v4. Everything runs locally your data stays on your machine, API keys are encrypted with AES-256-GCM, and there's no account or cloud dependency.

MIT licensed. Would love feedback on the editor UX and which agent integrations matter most to you.