diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca2bbfd8..566030e1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,73 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [13.0.1] - 2026-05-10
+
+## Bug fixes
+
+### MCP server
+- **#2371** — drop `${_R%/}` parameter-expansion trim in `.mcp.json` that tripped Claude Code's MCP validator
+
+### Environment isolation
+- **#2357** — block `ANTHROPIC_BASE_URL` leak; use a three-branch OAuth-skip predicate
+- Add `CLAUDE_MEM_ENV_FILE` lazy resolver so tests (and multi-profile users) can redirect the env-file path without module-load-order constraints
+
+### Worker lifecycle
+- Classify Claude SDK HTTP 400 as **unrecoverable** so the worker stops retrying a doomed request
+- Stop hook crash hardened: `onclose` handler now performs background tree-kill on unexpected subprocess exit
+
+### Chroma
+- **#2313** — enforce a single `chroma-mcp` subprocess per worker (singleton via `disposeCurrentSubprocess()` on every code path; tree-kill of orphans on dispose)
+- Pin `onnxruntime>=1.20` and `protobuf<7` to fix `INVALID_PROTOBUF` on macOS arm64
+
+### Build
+- Polyfill `import.meta.url` to `pathToFileURL(__filename)` in the CJS worker bundle so ESM-style code resolves correctly (CodeRabbit-driven follow-up)
+
+### Tests / review
+- `tests/env-isolation.test.ts` no longer mutates the real `~/.claude-mem/.env`; OAuth spy wrapped in try/finally to avoid leaks across runs
+- 3 new chroma-mcp regression tests for #2313 (singleton enforcement)
+
+### Misc
+- Daily dependency bump per CLAUDE.md maintenance policy
+
+Full diff: https://github.com/thedotmack/claude-mem/pull/2394
+
+## [13.0.0] - 2026-05-08
+
+## Highlights
+
+This is the **claude-mem 13** major release, landing the Server Beta runtime and the project's relicense.
+
+### Server Beta runtime (opt-in)
+- Independent server-beta service with its own lifecycle (`claude-mem server start/status/stop`)
+- Postgres-backed observation storage
+- BullMQ + Redis observation queue engine (gated behind `CLAUDE_MEM_QUEUE_ENGINE=bullmq`, fail-fast)
+- New `/v1` REST API surface (events, sessions, memories, search, context, audit, jobs)
+- API-key auth + Better-Auth proxy
+- Outbox pattern for transactional event-to-job pipelines
+- Generation-job primitives (`ServerJobQueue`, `ActiveServerBetaQueueManager`, deterministic colon-free SHA-256 job IDs)
+- Docker Compose + E2E harness for the new stack
+
+### Licensing
+- Repository relicensed from **AGPL-3.0** to **Apache-2.0**
+- `NOTICE` file added
+- `docs/license.md` and `docs/ip-boundary.md` clarify the OSS / commercial boundary
+- `ragtime/` subproject also relicensed to Apache-2.0
+
+### Installer
+- Server Beta is exposed as an installer option (default off — open-source core is unaffected)
+
+## Migration notes
+- Existing users on the worker-era plugin keep working — no breaking changes for the default install
+- Server Beta is opt-in. Worker continues to run on its existing port and SQLite store.
+- See `docs/migration-worker-to-server.md` for forward-looking migration guidance
+
+## Compatibility
+- Node ≥ 20, Bun ≥ 1.0
+- Server Beta requires Postgres + Redis (only when enabled)
+
+Full diff: https://github.com/thedotmack/claude-mem/compare/v12.7.5...v13.0.0
+
 ## [12.7.5] - 2026-05-07
 
 Patch release for npx installs that hit an existing Codex marketplace registration.