[stacked on #2124] WS1a: generic assembler + published testing kit

apps/host-daemon/package.json

@@ -61,6 +61,7 @@
     "zod": "^4.3.6"
   },
   "devDependencies": {
+    "@bb/plugin-build": "workspace:*",
     "@bb/scripts": "workspace:*",
     "@bb/test-helpers": "workspace:*",
     "@bb/tsconfig": "workspace:*",

apps/host-daemon/src/runtime-manager.ts

@@ -1459,6 +1459,21 @@ export class RuntimeManager {
         })),
       onInteractiveRequest: this.options.onInteractiveRequest,
       onStderr: this.options.onStderr,
+      onProviderRecovery: (hint) => {
+        // Parse-and-forward only: the recovery actions land with the runtime
+        // cleanup workstream. Logged so a hint is never silently consumed.
+        this.options.logger?.debug(
+          {
+            environmentId: args.environmentId,
+            providerId: hint.providerId,
+            threadId: hint.threadId,
+            kind: hint.kind,
+            retryable: hint.retryable,
+            message: hint.message,
+          },
+          "Provider bridge raised a recovery hint",
+        );
+      },
       onProcessExit: (info) => {
         if (!info.expected) {
           for (const event of this.buildUnexpectedProviderExitEvents(info)) {