diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ec1ffcd..cbc90303 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # aicodeman
 
+## 0.4.0
+
+### Minor Changes
+
+- Add CJK IME input textarea for xterm.js terminal (env toggle INPUT_CJK_FORM=ON). Always-visible textarea below terminal handles native browser IME composition, forwarding completed text to PTY on Enter. Supports arrow keys, Ctrl combos, backspace passthrough, and Escape to clear.
+
+  Add fork installation support to install.sh with CODEMAN_REPO_URL and CODEMAN_BRANCH env vars, allowing custom repository and branch for git clone/update operations. README updated with fork installation instructions.
+
+  Fix WebSocket session lifecycle: close WS connections when session exits (prevents orphaned listeners and stale writes to dead PTY), add readyState guard in onTerminal to stop buffering after socket closes, simplify heartbeat by removing redundant alive flag.
+
+  Add WebSocket reconnection with exponential backoff (1s-10s) on unexpected close, skipping server rejection codes (4004/4008/4009). Falls back gracefully to SSE+POST during reconnection.
+
+  Clear CJK textarea on session switch to prevent sending stale text to wrong session.
+
 ## 0.3.12
 
 ### Patch Changes
diff --git a/CLAUDE.md b/CLAUDE.md
index 3edf554e..d750e460 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -52,7 +52,7 @@ When user says "COM":
 4. **Sync CLAUDE.md version**: Update the `**Version**` line below to match the new version from `package.json`
 5. **Commit and deploy**: `git add -A && git commit -m "chore: version packages" && git push && npm run build && systemctl --user restart codeman-web`
 
-**Version**: 0.3.12 (must match `package.json`)
+**Version**: 0.4.0 (must match `package.json`)
 
 ## Project Overview
 
diff --git a/package.json b/package.json
index c4291432..daa0b51b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aicodeman",
-  "version": "0.3.12",
+  "version": "0.4.0",
   "description": "The missing control plane for AI coding agents - run 20 autonomous agents with real-time monitoring and session persistence",
   "type": "module",
   "main": "dist/index.js",