fix: return validator details for bounded retries

server-tools/bingshuo-tcs-controller/controller-engine.test.mjs

@@ -213,6 +213,10 @@ test("orientation prompt carries the exact runtime contract required by the vali
     observedInstructions.zhuyuan_cognition,
     /protocol_effects必须是对象数组/,
   );
+  assert.match(
+    observedInstructions.zhuyuan_cognition,
+    /B5\.prior_wrong_route/,
+  );
   assert.match(
     observedInstructions.zhuyuan_cognition,
     /guard_agent_projection\.schema必须等于/,
@@ -227,6 +231,38 @@ test("orientation prompt carries the exact runtime contract required by the vali
   );
 });
 
+test("validator details are returned to the model for a bounded retry", async () => {
+  const stateRoot = fs.mkdtempSync(path.join(os.tmpdir(), "bs-tcs-retry-"));
+  const fixture = new FixtureModelClient();
+  let orientationAttempts = 0;
+  let retryError = null;
+  const modelClient = {
+    async generate(request) {
+      if (request.role !== "tcs_event_orientation") {
+        return fixture.generate(request);
+      }
+      orientationAttempts += 1;
+      if (orientationAttempts === 1) {
+        const malformed = await fixture.generate(request);
+        malformed.signals[0] = { why: malformed.signals[0].why };
+        return malformed;
+      }
+      retryError = request.validatorError;
+      return fixture.generate(request);
+    },
+  };
+  const engine = new ControllerEngine({
+    stateRoot,
+    modelClient,
+    modelName: "fixture-model",
+  });
+  engine.initialize();
+  const receipt = await engine.runEvent(bootEvent());
+  assert.equal(receipt.outcome, "PASS");
+  assert.equal(orientationAttempts, 2);
+  assert.match(retryError, /orientation\.signal\.id/);
+});
+
 test("an interrupted technical cycle is preserved and restarted in a new state epoch", () => {
   const stateRoot = fs.mkdtempSync(path.join(os.tmpdir(), "bs-tcs-recovery-"));
   const first = new ControllerEngine({