P0-P2: heartbeat→mind wiring, structured JSON output, bge-m3 embeddings

package.json

@@ -1,9 +1,12 @@
 {
   "name": "spark-mind",
   "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
+  "description": "Self-hosted autonomous agent (heartbeat + memory + persona) on Spark X2.5-4B",
+  "main": "dist/index.js",
   "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "start": "node dist/index.js",
+    "dev": "node --loader ts-node/esm index.ts",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],