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Cloudflare Workers CLI for deploying, developing, and managing Workers, KV, R2, D1, Vectorize, Hyperdrive, Workers AI, Containers, Queues, Workflows, Pipelines, and Secrets Store. Load before running wrangler commands to ensure correct syntax and best practices.

Durable, long-running workflows with automatic retries and state persistence. Load when building multi-step async processes, implementing human-in-the-loop approval flows, coordinating API calls with retry logic, or creating reliable background jobs that survive restarts.

Run AI inference at the edge with OpenAI SDK and Workers AI. Load when generating text with LLMs, extracting structured JSON from text, building chat interfaces, streaming AI responses, generating embeddings, or integrating GPT-4/Claude via AI Gateway.

Core Workers fundamentals including handlers, configuration, and Service Bindings. Load when creating new Workers, configuring wrangler.jsonc, implementing fetch/scheduled/queue handlers, using Service Bindings for RPC, generating types with wrangler types, or building microservices.

Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed.

Vector database for embeddings and semantic search at the edge. Load when building RAG pipelines, implementing semantic search, storing embeddings from Workers AI, finding similar documents, building recommendation systems, or querying vectors by similarity.

Serve static files and single-page applications from Workers. Load when hosting React/Vue/Angular SPAs, building hybrid Workers with API routes and frontend, configuring SPA fallback routing, or deploying Vite/Next.js/Remix static exports.

S3-compatible object storage for files, images, and large data. Load when handling file uploads, storing images/videos/documents, generating presigned URLs, using multipart uploads for large files, migrating from S3, or serving static assets from buckets.

Asynchronous message queues for reliable background processing. Load when offloading background tasks, batch processing messages, implementing retry logic with dead letter queues, rate limiting upstream APIs, or decoupling producers from consumers.

Eventually-consistent key-value storage distributed globally. Load when implementing session storage, authentication tokens, caching API responses, feature flags, A/B testing, rate limiting, or storing user preferences at the edge.

Connection pooling and caching for PostgreSQL and MySQL databases. Load when connecting Workers to existing Postgres/MySQL, reducing connection overhead, using Drizzle/Prisma with external databases, or migrating traditional database apps to the edge.

Create and review SQLite-backed Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage API, PITR recovery, alarms, WebSocket hibernation, service bindings, or reviewing DO code for best practices. Comprehensive coverage of SQL queries, transactions, namespace API, and testing.

Serverless SQLite database for structured data at the edge. Load when building relational schemas, running SQL queries, managing migrations, performing CRUD operations, using JOINs/aggregations, handling JSON columns, or enforcing foreign keys with D1.

Deploy Next.js to Cloudflare Workers with full App Router, Pages Router, ISR, and SSG support. Load when creating Next.js projects for Workers, migrating from Vercel/next-on-pages, configuring caching (R2/KV/D1), accessing Cloudflare bindings via getCloudflareContext, or fixing bundle size issues.

Builds remote MCP (Model Context Protocol) servers on Cloudflare Workers with tools, OAuth authentication, and production deployment. Generates server code, configures auth providers, and deploys to Workers. Use when: user wants to "build MCP server", "create MCP tools", "remote MCP", "deploy MCP", add "OAuth to MCP", or mentions Model Context Protocol on Cloudflare. Also triggers on "MCP authentication" or "MCP deployment".

Builds AI agents on Cloudflare using the Agents SDK with state management, real-time WebSockets, scheduled tasks, tool integration, and chat capabilities. Generates production-ready agent code deployed to Workers. Use when: user wants to "build an agent", "AI agent", "chat agent", "stateful agent", mentions "Agents SDK", needs "real-time AI", "WebSocket AI", or asks about agent "state management", "scheduled tasks", or "tool calling".

Headless Chrome automation for web scraping, screenshots, PDFs, and testing at the edge. Load when capturing page screenshots, generating PDFs, scraping dynamic content, extracting structured data, or automating browser interactions. Supports REST API, Puppeteer, Playwright, and Stagehand.

Write and query high-cardinality event data at scale with SQL. Load when tracking user events, billing metrics, per-tenant analytics, A/B testing, API usage, or custom telemetry. Use writeDataPoint for non-blocking writes and SQL API for aggregations.

Build stateful AI agents using the Cloudflare Agents SDK. Load when creating agents with persistent state, scheduling, RPC, MCP servers, email handling, or streaming chat. Covers Agent class, AIChatAgent, state management, and Code Mode for reduced token usage.