diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index a09efe7f..23860f90 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.12.0"
+  ".": "1.13.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 48b3530e..54d2919b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [1.13.0](https://github.com/agentclientprotocol/codex-acp/compare/v1.12.0...v1.13.0) (2026-09-22)
+
+
+### Features
+
+* Add expermental ACP session compaction updates ([#515](https://github.com/agentclientprotocol/codex-acp/issues/515)) ([6ec22f3](https://github.com/agentclientprotocol/codex-acp/commit/6ec22f39774320d759bf9ba37fc536c68766d1af))
+
+
+### Bug Fixes
+
+* prefer terminal output deltas ([#528](https://github.com/agentclientprotocol/codex-acp/issues/528)) ([71bceb1](https://github.com/agentclientprotocol/codex-acp/commit/71bceb19c20887c91df3a30a6bf930abb033ccf8))
+* update codex to 0.155.0 ([#523](https://github.com/agentclientprotocol/codex-acp/issues/523)) ([d7b07c1](https://github.com/agentclientprotocol/codex-acp/commit/d7b07c1b44a28890cdf3d5450f8974a812db5ae2))
+* update codex to 0.155.1 ([#525](https://github.com/agentclientprotocol/codex-acp/issues/525)) ([acc035a](https://github.com/agentclientprotocol/codex-acp/commit/acc035a7444bf7550aabcc24597ed845ba3e593b))
+
 ## [1.12.0](https://github.com/agentclientprotocol/codex-acp/compare/v1.11.0...v1.12.0) (2026-09-15)
 
 
diff --git a/package-lock.json b/package-lock.json
index 9257884a..bfc5120f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@agentclientprotocol/codex-acp",
-  "version": "1.12.0",
+  "version": "1.13.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@agentclientprotocol/codex-acp",
-      "version": "1.12.0",
+      "version": "1.13.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@agentclientprotocol/sdk": "^1.4.0",
diff --git a/package.json b/package.json
index cf64a9a1..5d7e61cd 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "version": "1.12.0",
+  "version": "1.13.0",
   "description": "",
   "main": "dist/index.js",
   "bin": {