fix: handle undefined stats in sessionEnd (v0.1.67)

- Add defensive check for this.data.stats
- Initialize with defaults if missing
- Fixes "Cannot read properties of undefined (reading 'last_session')"

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

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

npm/packages/ruvector/.ruvector/intelligence.json

@@ -121,5 +121,13 @@
     "rewardHistory": [
       1
     ]
+  },
+  "stats": {
+    "total_patterns": 0,
+    "total_memories": 0,
+    "total_trajectories": 0,
+    "total_errors": 0,
+    "session_count": 0,
+    "last_session": 0
   }
 }

npm/packages/ruvector/bin/cli.js

@@ -2609,8 +2609,13 @@ class Intelligence {
   }
 
   sessionEnd() {
-    const duration = this.now() - (this.sessionStartTime || this.data.stats.last_session);
-    const actions = this.data.trajectories.filter(t => t.timestamp >= this.data.stats.last_session).length;
+    // Ensure stats exists with defaults
+    if (!this.data.stats) {
+      this.data.stats = { total_patterns: 0, total_memories: 0, total_trajectories: 0, total_errors: 0, session_count: 0, last_session: 0 };
+    }
+    const lastSession = this.data.stats.last_session || 0;
+    const duration = this.now() - (this.sessionStartTime || lastSession);
+    const actions = (this.data.trajectories || []).filter(t => t.timestamp >= lastSession).length;
 
     // Force learning cycle (only if engine already initialized)
     const eng = this.getEngineIfReady();

npm/packages/ruvector/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ruvector",
-  "version": "0.1.66",
+  "version": "0.1.67",
   "description": "High-performance vector database for Node.js with automatic native/WASM fallback",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",