Anthropic's official skill for building new Claude Code skills, testing them with evals and benchmarks, and tuning descriptions for reliable triggering.
Search and rewrite code across 25 languages by syntax shape (AST) instead of text, with a safe two-pass codemod workflow.
A three-phase Scan/Fix/Verify skill that finds WCAG 2.2 A and AA violations and writes framework-specific fixes for React, Vue, Angular, Svelte, Next.js and plain HTML.
Runs your diff through three hostile reviewer personas so you never get a lazy "LGTM" before merging.
Gives Claude a domain-organized Biopython playbook for sequences, NCBI/Entrez, BLAST, structures, and phylogenetics.
Official skill that scaffolds a React + Tailwind + shadcn/ui app and bundles it into a single self-contained HTML artifact.
Official skill that lets Claude drive a real headless browser with Playwright to click, screenshot, and read console logs while testing your local web app.
Official Anthropic skill that grounds Claude Code in current API facts — model IDs, pricing, streaming, tool use, agents, caching and migrations.
Runs a 9-dimension, file-cited technical debt audit and writes a prioritized TECH_DEBT_AUDIT.md report.
Search, read, and reconstruct local coding-agent sessions across Codex, Claude Code, OpenCode and 20+ other agents from one command.
A Git-focused skill for atomic commits, safe rebases, and evidence-backed history forensics.
A frontend discipline skill that forbids saying "done" until the build passes and the result is screenshot-verified in a real browser.
Explore codebases with tree-sitter AST parsing — index first, fetch details on demand, and cut token usage several-fold.
An all-in-one Git skill that splits changes into atomic commits, drives safe rebases, and digs through history.
An expert Git agent that splits work into atomic commits, cleans history with rebase/squash, and digs through history to find when and why code changed.
A Scrum-focused toolkit for writing INVEST user stories, Given-When-Then acceptance criteria, sprint plans, and velocity metrics.
Scans your codebase for API routes and auto-generates integration test suites covering auth, validation, error codes, pagination, uploads and rate limits.
A six-step skill that turns requirements into an Azure architecture, Bicep templates, cost optimizations, CI/CD pipelines, and a security review.
Designs startup-friendly AWS architectures and generates CloudFormation/CDK/Terraform templates plus cost-optimization plans.
Turns a sprawling GitHub issue backlog into a handful of root-cause "plan-master" issues plus a shippable roadmap.