durable-objects

Build stateful, coordinated applications on Cloudflare's edge with persistent storage and RPC methods. Build stateful, coordinated applications on Cloudflare's edge using Durable Objects. Your knowledge of Durable Objects APIs and configuration may be outdated. Prefer retrieval over pre-training for any Durable Objects task. Fetch the relevant doc page when implementing features. Search: blockConcurrencyWhile , idFromName , getByName , setAlarm , sql.exec - Designed for coordination patterns: chat rooms, multiplayer games, booking systems, and per-entity state management using deterministic routing via getByName() - Includes SQLite storage with synchronous sql.exec() , KV storage, alarms for scheduled per-entity work, and WebSocket support - Provides RPC method calls (preferred over fetch handlers), blockConcurrencyWhile() for initialization, and parent-child DO relationships for sharding - Covers wrangler configuration, migrations, Workers integration, and testing with Vitest; biases toward live Cloudflare docs over pre-trained knowledge - Creating new Durable Object classes for stateful coordination - Implementing RPC methods, alarms, or WebSocket handlers - Reviewing existing DO code for best practices - Configuring wrangler.jsonc/toml for DO bindings and migrations - Writing tests with @cloudflare/vitest-pool-workers - Designing sharding strategies and parent-child...