Best Open-Source Skills

Escape generic AI-generated UIs. Forces a bold, distinctive design direction before any code is written.

One skill covering every document format the category exists for — including scanned PDFs and RAG chunking — from the maintainers of the parser itself.

Structured multi-step development. Brainstorm → spec → plan → build → review → merge — TDD baked in.

Microsoft's first-party Playwright skill, invoked through the CLI — the reference implementation for driving a real browser, with no credentials required.

The only vendor-official skill from a major diagramming product — and it emits editable .drawio files rather than a throwaway image.

1,000+ SaaS integrations as one skill. OAuth lifecycle, scoped credentials, structured actions.

Extract, fill, merge. PDF manipulation with bundled scripts so Claude does not waste tokens generating them.