diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43d7956b4..24f786c71 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,29 @@
 
 ## [Unreleased]
 
+## [1.12.0](https://github.com/agentclientprotocol/agent-client-protocol/compare/v1.11.0...v1.12.0) - 2026-10-14
+
+### Added
+
+- *(unstable)* add client system prompt schema ([#2361](https://github.com/agentclientprotocol/agent-client-protocol/pull/2361))
+- *(rust)* implement Eq for content blocks ([#2352](https://github.com/agentclientprotocol/agent-client-protocol/pull/2352))
+
+### Fixed
+
+- *(schema)* align v2 experimental feature compatibility ([#2397](https://github.com/agentclientprotocol/agent-client-protocol/pull/2397))
+
+### Other
+
+- *(v2)* clarify replay IDs and unsupported cursors ([#2398](https://github.com/agentclientprotocol/agent-client-protocol/pull/2398))
+- *(v2)* align normative cancellation requirements ([#2390](https://github.com/agentclientprotocol/agent-client-protocol/pull/2390))
+- *(unstable-v2)* clarify prompt insertion contract ([#2392](https://github.com/agentclientprotocol/agent-client-protocol/pull/2392))
+- *(unstable-v2)* clarify foreground work lifecycle ([#2387](https://github.com/agentclientprotocol/agent-client-protocol/pull/2387))
+- *(v2)* clarify prompt cancellation when closing sessions ([#2385](https://github.com/agentclientprotocol/agent-client-protocol/pull/2385))
+- *(schema)* specify how git_patch writes paths ([#2362](https://github.com/agentclientprotocol/agent-client-protocol/pull/2362))
+- *(unstable)* clarify that a forked session is active ([#2359](https://github.com/agentclientprotocol/agent-client-protocol/pull/2359))
+- *(schema)* list full v2 session baseline on AgentCapabilities.session ([#2358](https://github.com/agentclientprotocol/agent-client-protocol/pull/2358))
+- *(schema)* clarify v2 foreground work can start without a prompt ([#2357](https://github.com/agentclientprotocol/agent-client-protocol/pull/2357))
+
 ## [1.11.0](https://github.com/agentclientprotocol/agent-client-protocol/compare/v1.10.2...v1.11.0) - 2026-10-09
 
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index 8d2c1462a..4a3d5c76b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,15 +4,15 @@ version = 4
 
 [[package]]
 name = "agent-client-protocol-json-schema-v1"
-version = "1.25.0"
+version = "1.26.0"
 
 [[package]]
 name = "agent-client-protocol-json-schema-v2"
-version = "2.0.0-alpha.8"
+version = "2.0.0-alpha.9"
 
 [[package]]
 name = "agent-client-protocol-schema"
-version = "1.11.0"
+version = "1.12.0"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/Cargo.toml b/Cargo.toml
index 1cbe9b801..1929e2ac3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ members = [
 resolver = "3"
 
 [workspace.dependencies]
-agent-client-protocol-schema = { path = "agent-client-protocol-schema", version = "1.11.0" }
+agent-client-protocol-schema = { path = "agent-client-protocol-schema", version = "1.12.0" }
 
 [workspace.lints.rust]
 future_incompatible = { level = "warn", priority = -1 }
diff --git a/agent-client-protocol-schema/Cargo.toml b/agent-client-protocol-schema/Cargo.toml
index ab72ecf5c..086bf3d24 100644
--- a/agent-client-protocol-schema/Cargo.toml
+++ b/agent-client-protocol-schema/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "agent-client-protocol-schema"
 authors = ["Zed <hi@zed.dev>"]
-version = "1.11.0"
+version = "1.12.0"
 edition = "2024"
 license = "Apache-2.0"
 description = "A protocol for standardizing communication between code editors and AI coding agents"
diff --git a/schema/v1/CHANGELOG.md b/schema/v1/CHANGELOG.md
index be024d17c..936c88df3 100644
--- a/schema/v1/CHANGELOG.md
+++ b/schema/v1/CHANGELOG.md
@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.26.0](https://github.com/agentclientprotocol/agent-client-protocol/compare/schema-v1.25.0...schema-v1.26.0) - 2026-10-14
+
+### Added
+
+- *(unstable)* add client system prompt schema ([#2361](https://github.com/agentclientprotocol/agent-client-protocol/pull/2361))
+
+### Other
+
+- *(unstable)* clarify that a forked session is active ([#2359](https://github.com/agentclientprotocol/agent-client-protocol/pull/2359))
+
 ## [1.25.0](https://github.com/agentclientprotocol/agent-client-protocol/compare/schema-v1.24.1...schema-v1.25.0) - 2026-10-09
 
 ### Added
diff --git a/schema/v1/Cargo.toml b/schema/v1/Cargo.toml
index 451aa83c5..f1185bb4e 100644
--- a/schema/v1/Cargo.toml
+++ b/schema/v1/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-json-schema-v1"
-version = "1.25.0"
+version = "1.26.0"
 edition = "2024"
 license = "Apache-2.0"
 description = "Version marker for ACP v1 JSON Schema GitHub releases"
diff --git a/schema/v2/CHANGELOG.md b/schema/v2/CHANGELOG.md
index 500d0f918..15a23a7ae 100644
--- a/schema/v2/CHANGELOG.md
+++ b/schema/v2/CHANGELOG.md
@@ -7,6 +7,28 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.0.0-alpha.9](https://github.com/agentclientprotocol/agent-client-protocol/compare/schema-v2.0.0-alpha.8...schema-v2.0.0-alpha.9) - 2026-10-14
+
+### Added
+
+- *(unstable)* add client system prompt schema ([#2361](https://github.com/agentclientprotocol/agent-client-protocol/pull/2361))
+
+### Fixed
+
+- *(schema)* align v2 experimental feature compatibility ([#2397](https://github.com/agentclientprotocol/agent-client-protocol/pull/2397))
+
+### Other
+
+- *(v2)* clarify replay IDs and unsupported cursors ([#2398](https://github.com/agentclientprotocol/agent-client-protocol/pull/2398))
+- *(v2)* align normative cancellation requirements ([#2390](https://github.com/agentclientprotocol/agent-client-protocol/pull/2390))
+- *(unstable-v2)* clarify prompt insertion contract ([#2392](https://github.com/agentclientprotocol/agent-client-protocol/pull/2392))
+- *(unstable-v2)* clarify foreground work lifecycle ([#2387](https://github.com/agentclientprotocol/agent-client-protocol/pull/2387))
+- *(v2)* clarify prompt cancellation when closing sessions ([#2385](https://github.com/agentclientprotocol/agent-client-protocol/pull/2385))
+- *(schema)* specify how git_patch writes paths ([#2362](https://github.com/agentclientprotocol/agent-client-protocol/pull/2362))
+- *(unstable)* clarify that a forked session is active ([#2359](https://github.com/agentclientprotocol/agent-client-protocol/pull/2359))
+- *(schema)* list full v2 session baseline on AgentCapabilities.session ([#2358](https://github.com/agentclientprotocol/agent-client-protocol/pull/2358))
+- *(schema)* clarify v2 foreground work can start without a prompt ([#2357](https://github.com/agentclientprotocol/agent-client-protocol/pull/2357))
+
 ## [2.0.0-alpha.8](https://github.com/agentclientprotocol/agent-client-protocol/compare/schema-v2.0.0-alpha.7...schema-v2.0.0-alpha.8) - 2026-10-09
 
 ### Added
diff --git a/schema/v2/Cargo.toml b/schema/v2/Cargo.toml
index 3d98b8b53..c453cb0d4 100644
--- a/schema/v2/Cargo.toml
+++ b/schema/v2/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-json-schema-v2"
-version = "2.0.0-alpha.8"
+version = "2.0.0-alpha.9"
 edition = "2024"
 license = "Apache-2.0"
 description = "Version marker for ACP v2 JSON Schema artifacts"