Superpowers' planning skill turns an approved spec into a bite-sized implementation plan with exact files, full code, tests and no placeholders.

Superpowers' writing-skills skill applies TDD to agent skills: watch an agent fail a pressure scenario first, write the SKILL.md, then close loopholes.

AI Maestro skill that makes agents search auto-generated codebase docs for function signatures, classes, and APIs before writing code.

Write comprehensive clinical reports - case reports (CARE guidelines), diagnostic reports (radiology/pathology/lab), clinical trial reports (ICH-E3, SAE, CSR.

Anthropic example skill. Not a paid writer.

An open-source Spec-Driven Development toolkit that makes specifications executable. Works with Claude Code, GitHub Copilot, Gemini CLI, and Codex to keep agents on task.

Anthropic's developer site for building with Claude and Claude Code: engineering articles, guides from the Claude team, and release-oriented tips for terminal, IDE, and API work.

Humanizer is a MIT agent skill that rewrites AI-sounding prose using 35 patterns from Wikipedia's Signs of AI writing, without changing the facts.

Skills Explorer is a browsable index of GitHub agent skills with on-demand visual flows built from each SKILL.md.