Reference

The reference section is what you reach for when you know what you're looking for: the exact import path, the deprecation status of a name, the steps to migrate from one minor to the next.

Pages in this section

Page	What it answers
Core subpath exports	Every @open-matrix/core/... subpath, what it exports, and when to use it.
Public API ledger	The canonical list of named exports from @open-matrix/core and @matrix/test-utils.
Deprecated APIs	What's marked @deprecated, when it goes away, and what to use instead.
Migration guides	Per-version walk-throughs for breaking changes.

Where to look first

If you want to know...	Read
"What's the canonical import for MatrixActor?"	Core subpath exports
"Is symbol X stable?"	Public API ledger + Stability levels
"Is symbol X going away?"	Deprecated APIs
"How do I move from 0.0.x to 0.1.x?"	Migration guides

Conventions

The SDK is on 0.x. The deprecation policy is described in Stability levels. Briefly:

• Public symbols are exported from the root barrel and/or a deep subpath in package.json.
• Deprecated symbols carry @deprecated JSDoc with the replacement.
• Removal targets are listed in Deprecated APIs, expressed as minor versions.
• The wire protocol (MxEnvelope, system ops, six declarations) is treated more strictly than the SDK surface — wire-breaking changes go through workstream review.

Source: projects/matrix-3/packages/core/package.json:23-324 (exports), projects/matrix-3/packages/core/src/index.ts (root barrel).