durable-objects

# Durable Objects Build stateful, coordinated applications on Cloudflare's edge using Durable Objects. ## Retrieval Sources Your knowledge of Durable Objects APIs and configuration may be outdated. **Prefer retrieval over pre-training** for any Durable Objects task. | Resource | URL | |----------|-----| | Docs | https://developers.cloudflare.com/durable-objects/ | | API Reference | https://developers.cloudflare.com/durable-objects/api/ | | Best Practices | https://developers.cloudflare.com/durable-objects/best-practices/ | | Examples | https://developers.cloudflare.com/durable-objects/examples/ | Fetch the relevant doc page when implementing features. ## When to Use - 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’s Vitest integration - Designing sharding strategies and parent-child relationships ## Reference Documentation - `./references/rules.md` - Core rules, storage, concurrency, RPC, alarms - [Testing reference](./references/testing.md) - Current Vitest documentation, migration choices, and test selection - `./references/workers.md` - Workers handlers, types, wrangler config, observability Search: `blockConcurrencyWhile`, `idFromName`, `getByName`, `setAlarm`, `sql.exec` ## Core Principles ### Use Durable Objects For | Need | Example | |------|...