The builder declares what it announces

Its account is scoped from what it emits and consumes, and it declared neither —
which is why asking for a generic module account produced one that authenticated
and could do nothing, with the refusal surfacing a layer away as a permissions
error against a queue.

Declaring the announcement is not documentation here. It is what the permission
is derived from.

Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

modules/builder/module.json

@@ -13,6 +13,9 @@
   "requires": [
     "artifact-store"
   ],
+  "emits": [
+    "module.builder.built"
+  ],
   "own-secrets": {
     "broker": "/var/lib/mesh/builder/broker"
   },