Define Phast v0 portable tool-belt contract

phast.json

@@ -1,11 +1,17 @@
 {
   "schema_version": 1,
-  "kind": "phast.app",
-  "slug": "my-phast",
+  "kind": "phast",
+  "slug": "my",
   "name": "My Phast",
-  "runtime": "python",
-  "base_url": "https://my.phast.app",
-  "human": {"route": "/"},
-  "mcp": {"route": "/mcp"},
-  "prephab": {"version": 1}
+  "host": "my.phast.app",
+  "surfaces": {"human": "/", "mcp": "/mcp"},
+  "tools": {
+    "management": ["phasts_list","phasts_get","phasts_create","phasts_update","providers_search","widgets_list","widgets_add","widgets_update","widgets_remove"],
+    "installed": []
+  },
+  "connections": [],
+  "prefab": {
+    "version": 1,
+    "home": {"mode": "grid", "edit": true, "widgets": []}
+  }
 }