feat: implement native hooks runtime

package.json

@@ -0,0 +1,30 @@
+{
+  "name": "pi-native-hooks",
+  "version": "0.1.0",
+  "description": "Native Pi hooks runtime for shared diagnostics and verification gates",
+  "type": "module",
+  "engines": { "node": ">=22.19" },
+  "keywords": ["pi-package"],
+  "exports": {
+    "./policy": { "types": "./src/policy.ts", "default": "./src/policy.ts" }
+  },
+  "pi": {
+    "extensions": ["./extensions/pi-native-hooks/index.ts"],
+    "skills": ["./skills/native-hook-authoring"]
+  },
+  "scripts": {
+    "test": "node --import tsx --test --experimental-test-coverage tests/*.test.ts",
+    "typecheck": "tsc --noEmit"
+  },
+  "peerDependencies": {
+    "@earendil-works/pi-coding-agent": "*",
+    "typebox": "*"
+  },
+  "devDependencies": {
+    "@earendil-works/pi-coding-agent": "^0.84.4",
+    "@types/node": "^24.0.0",
+    "typebox": "^1.0.48",
+    "tsx": "^4.20.0",
+    "typescript": "^5.9.0"
+  }
+}