diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9599569..99e23b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## [0.22.0] - 2026-09-26
+
 ### Breaking
 
 - **`sendMessage` takes the text alone, and sends no `_meta["ai.nimblebrain/context"]`.** `sendMessage(text, context)` and `useSendMessage()`'s second argument are gone. What the user is acting on reaches the agent through the spec's `updateModelContext`, which the NimbleBrain host attaches to the next turn.
diff --git a/package.json b/package.json
index 8ec6acb..404c1dd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nimblebrain/synapse",
-  "version": "0.21.1",
+  "version": "0.22.0",
   "description": "Agent-aware app SDK for the MCP ext-apps protocol",
   "type": "module",
   "exports": {
diff --git a/python/nimblebrain_synapse/__init__.py b/python/nimblebrain_synapse/__init__.py
index 7273e2d..2b422be 100644
--- a/python/nimblebrain_synapse/__init__.py
+++ b/python/nimblebrain_synapse/__init__.py
@@ -38,4 +38,4 @@
 # independently of the JS one (different cadence, different consumers); the two
 # meet only on the wire protocol. CI keeps this equal to the sibling package.json
 # version (ci.yml build job), so the pin can't silently go stale.
-__client_version__ = "0.21.1"
+__client_version__ = "0.22.0"