v0.4.0

Object-schema authoring (defineSync) replaces the builder, and typed commands run end to end (ADR-0014). Breaking, no compat shim.

Changed

• Authoring is now an object schema, not a builder (ADR-0014). new SyncRegistry().defineCollection().defineMutation().defineCommand() is replaced by defineSync<User, Env>(), which binds identity/env once and returns { collection, command, schema }. Mutations are a closed insert/update/delete trio co-located on the collection (mirroring @tanstack/db's onInsert/onUpdate/onDelete — a custom mutation type is now structurally unrepresentable), superseding ADR-0001 D11 and absorbing ADR-0010's row manifest: the row type lives on the collection (sync.collection<Message>({ pk })) instead of a third SyncRegistry generic. The DO registers the schema value with this.registerSync(schema). Breaking, no compat shim.

Added

• Typed commands, end to end (ADR-0014). export type Api = typeof schema is the whole client contract: new WebSocketTransport<Api>() exposes a typed transport.call.<command>(args) proxy plus a typed low-level sendCall(name, args) (txId generated internally via crypto.randomUUID()), and doCollectionOptions<Api, "table">({ … }) infers the row type from the schema — one source of truth across server and client.
• examples/multi-do — a two-Durable-Object example: one transport per DO, a React SyncProvider/useSync keyed by DO so command namespaces never collide, and a client-side cross-DO feed.

Full Changelog: v0.3.3...v0.4.0