ClaudeSkillz

Find duplicate, near-duplicate, and functionally overlapping Claude Code skills in a collection. Use when auditing a skills library for redundancy, after bulk-downloading from multiple sources, or before committing new skills to a repository.

Guide to Cloudflare Durable Objects: globally unique, stateful objects for coordination, real- time communication and persistent state. Covers the DurableObject class and bindings, WebSocket Hibernation (ctx.acceptWebSocket, webSocketMessage, serializeAttachment), SQLite storage via ctx.storage.sql, alarms with storage.setAlarm and the alarm() handler, ids from idFromName, newUniqueId and getByName, RPC methods, blockConcurrencyWhile, migrations and location hints. Documents 15+ pitfalls: class not exported, missing or wrong migrations, new_sqlite_classes, constructor work and setTimeout or fetch breaking hibernation, in-memory state lost on hibernation, partial deleteAll on the KV backend, binding mismatches, state size limits and alarm retry failures. Use when building chat rooms, multiplayer games, rate limiters, session stores, queues or per-user state on Workers, or debugging DO migration, hibernation and alarm errors.

Build AI agents with Google's Agent Development Kit (ADK) for Python. Use when creating tool-using or multi-agent systems, wiring sequential, parallel or loop workflow agents, integrating Google Search or code execution, evaluating agent performance, or deploying to Vertex AI Agent Engine or Cloud Run.

Reference for Cloudflare Browser Rendering, headless Chrome on Workers via @cloudflare/puppeteer and @cloudflare/playwright. Covers the browser binding, puppeteer.launch, puppeteer.connect and puppeteer.sessions, page.goto, page.screenshot, page.pdf, page.evaluate, browser.close and disconnect, session reuse with keep_alive, incognito contexts, batch scraping and crawling, and pricing and concurrency limits. Use when taking screenshots, generating PDFs from URLs or HTML, scraping or crawling sites, automating or testing web apps from a Worker, extracting page content for AI, or troubleshooting browser timeouts, concurrency limits, memory exceeded errors, XPath selectors not supported, or Cannot read properties of undefined (reading fetch).

Cloudflare Zero Trust Access authentication for Cloudflare Workers applications. Covers hono- cloudflare-access middleware setup, manual Access JWT validation with public key caching, service tokens for machine-to-machine auth, CORS handling in front of Access, identity providers (Azure AD, Google Workspace, Okta, GitHub), role-based access control, geographic restrictions, multi-tenant configurations, and Access policy setup. Prevents eight common errors including blocked CORS preflight requests, key cache race conditions, missing JWT headers, and dev/prod team mismatches. Use when protecting Worker routes or admin dashboards with Access, validating Access JWT claims, authenticating backend services or CI/CD jobs to a Worker API, or debugging blocked preflight requests, a missing Access JWT header, or team mismatch errors.

Discover, clone, and consolidate Claude Code skills from many GitHub repositories at once. Use when bulk-downloading skills, building or refreshing a skills collection, flattening nested skill directories, or batch-importing from a curated list of repos.

Coordinate development workflows across multiple Git repositories with synchronized branching, batch commits, cross-repo operations, and monorepo-like workflows for microservices and multi-package projects.

Production-ready starter project for React 19 + Cloudflare Workers + Hono, with D1, KV, R2, and Workers AI pre-configured plus opt-in enable scripts for Clerk auth, AI chat, Queues, and Vectorize. Ships Tailwind v4, shadcn/ui, TypeScript, the Vite Cloudflare plugin, AI SDK provider setup (Workers AI, OpenAI, Anthropic, Gemini), planning docs, and a session handoff protocol. Use when starting a new full-stack Cloudflare project, scaffolding a React + Hono web app, building an AI chat or RAG application, or needing a complete production boilerplate instead of hours of manual setup. Prevents service binding mistakes, CORS errors, frontend-backend connection issues, Clerk integration problems, and AI SDK configuration confusion.

Production-tested patterns for wiring a React frontend to a Cloudflare Workers + Hono backend with Clerk authentication and D1, including an API client that attaches auth tokens automatically, a ProtectedRoute auth gate with loading states, CORS middleware for dev and production, Clerk JWT verification middleware, wrangler.jsonc bindings, .dev.vars environment variables, and @cloudflare/vite-plugin config (the Worker and frontend share one dev port, so relative /api URLs are correct). Use when connecting frontend to backend, implementing an auth flow, or troubleshooting CORS errors, 401 Unauthorized responses, auth tokens not passing, race conditions while auth is still loading, environment variable confusion, or D1 connection issues.

Analyze datasets to discover patterns, anomalies, and relationships. Use when exploring data files, generating statistical summaries, checking data quality, or creating visualizations. Supports CSV, Excel, JSON, Parquet, and more.