fix: emit state after refreshing runtime info so clients get model updates

The Claude agent model was not showing in the UI ("Model: Unknown") because
refreshRuntimeInfo() updated agent.runtimeInfo but never called emitState()
to notify connected clients of the change.

Fixed by:
1. Adding change detection in refreshRuntimeInfo() to check if model, sessionId,
   or modeId changed
2. Calling emitState(agent) when changes are detected
3. Added debug logging in handleSystemMessage() to confirm model capture

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/server/src/server/agent/agent-manager.ts

@@ -782,7 +782,16 @@ export class AgentManager {
 
   private async refreshRuntimeInfo(agent: ActiveManagedAgent): Promise<void> {
     try {
-      agent.runtimeInfo = await agent.session.getRuntimeInfo();
+      const newInfo = await agent.session.getRuntimeInfo();
+      const changed =
+        newInfo.model !== agent.runtimeInfo?.model ||
+        newInfo.sessionId !== agent.runtimeInfo?.sessionId ||
+        newInfo.modeId !== agent.runtimeInfo?.modeId;
+      agent.runtimeInfo = newInfo;
+      // Emit state if runtimeInfo changed so clients get the updated model
+      if (changed) {
+        this.emitState(agent);
+      }
     } catch {
       // Keep existing runtimeInfo if refresh fails.
     }

packages/server/src/server/agent/providers/claude-agent.ts

@@ -875,6 +875,7 @@ class ClaudeAgentSession implements AgentSession {
     this.persistence = null;
     // Capture actual model from SDK init message (not just the configured model)
     if (message.model) {
+      console.log(`[ClaudeAgentSession] Captured model from SDK init: ${message.model}`);
       this.lastOptionsModel = message.model;
       // Invalidate cached runtime info so it picks up the new model
       this.cachedRuntimeInfo = null;

plan.md

@@ -122,12 +122,13 @@ Hard requirement: We must get the actual runtime model, not just echo back the r
   - If issues found: add fix tasks immediately after this task, then add re-test task after fixes.
   - **Done (2025-12-21 13:50)**: FAILED. Created Claude agent with "Automatic" model config. Agent self-reported running on `claude-opus-4-1-20250805` (Opus 4.1), but UI shows **Model: Unknown** in agent info menu. The implementation to capture model from SDK init message is not working - model is not being propagated to the UI.
 
-- [ ] **Fix**: Debug and fix Claude agent model capture from SDK init message.
+- [x] **Fix**: Debug and fix Claude agent model capture from SDK init message.
   - Check server logs to see if `handleSystemMessage()` is receiving the init message with model
   - Verify `this.lastOptionsModel` is being set correctly
   - Check if `getRuntimeInfo()` is being called after stream completion
   - Ensure runtime info is being persisted and sent to client via WebSocket
   - The model should show `claude-opus-4-1-20250805` instead of "Unknown"
+  - **Done (2025-12-21 14:10)**: Found and fixed the bug. The issue was in `agent-manager.ts:refreshRuntimeInfo()` - it updated `agent.runtimeInfo` but never called `emitState(agent)` to notify clients. Fixed by adding change detection and emitting state when runtimeInfo changes. Also added debug logging to `handleSystemMessage()` to confirm model capture from SDK init message. Typecheck passes.
 
 - [ ] **Test**: Re-verify Claude agent model display after fix.
   - Create a new Claude agent with default model
@@ -141,6 +142,15 @@ Hard requirement: We must get the actual runtime model, not just echo back the r
   - Add implementation tasks if improvements needed
   - Add fix tasks if tests reveal issues
 
+- [ ] **Plan**: Fix agent git diff not loading.
+
+  - Investigate why git diff is not loading in agent view.
+  - Find where git diff is fetched and rendered.
+  - Identify the root cause of the loading failure.
+  - Add implementation/fix tasks based on findings.
+  - Add test task to verify git diff loads correctly via Playwright MCP.
+  - Add another **Plan** task to re-audit after fix if needed.
+
 - [ ] **Plan**: Design and implement agent parent/child hierarchy.
 
   - Add `parentId` field to agents.