diff --git a/server-tools/bingshuo-tcs-controller/controller-engine.mjs b/server-tools/bingshuo-tcs-controller/controller-engine.mjs
index c14c7c3..8f61709 100644
--- a/server-tools/bingshuo-tcs-controller/controller-engine.mjs
+++ b/server-tools/bingshuo-tcs-controller/controller-engine.mjs
@@ -28,6 +28,9 @@ function digestFile(file) {
 function sourceFingerprint() {
   const sources = [
     runtimePath,
+    path.join(moduleDir, "controller-engine.mjs"),
+    path.join(moduleDir, "model-client.mjs"),
+    path.join(moduleDir, "server.mjs"),
     path.join(
       repositoryRoot,
       "tcs-core/zhuyuan-brain/runtime/brain-runtime-contract.json",
@@ -111,7 +114,14 @@ export class ControllerEngine {
 
   initialize() {
     fs.mkdirSync(this.exchangeDir, { recursive: true });
-    const stateFile = path.join(this.stateDir, "state.json");
+    let stateFile = path.join(this.stateDir, "state.json");
+    if (fs.existsSync(stateFile)) {
+      const existing = this.status();
+      if (existing.status === "PERCEIVING" && existing.active_cycle_id) {
+        this.stateDir = `${this.stateDir}-technical-recovery-${Date.now()}`;
+        stateFile = path.join(this.stateDir, "state.json");
+      }
+    }
     if (!fs.existsSync(stateFile)) {
       runRuntime("enter", [
         "--state-dir",
diff --git a/server-tools/bingshuo-tcs-controller/controller-engine.test.mjs b/server-tools/bingshuo-tcs-controller/controller-engine.test.mjs
index 00cf0e5..ce9722f 100644
--- a/server-tools/bingshuo-tcs-controller/controller-engine.test.mjs
+++ b/server-tools/bingshuo-tcs-controller/controller-engine.test.mjs
@@ -3,7 +3,11 @@ import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
 import test from "node:test";
-import { ControllerEngine, bootEvent } from "./controller-engine.mjs";
+import {
+  ControllerEngine,
+  bootEvent,
+  runRuntime,
+} from "./controller-engine.mjs";
 
 class FixtureModelClient {
   async generate({ role, input }) {
@@ -167,3 +171,31 @@ test("resident engine completes a model-backed brain and controller cycle", asyn
   assert.equal(receipt.existence.living_ai_system_controller_running, 100);
   assert.equal(receipt.completed_cycles, 1);
 });
+
+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({
+    stateRoot,
+    modelClient: new FixtureModelClient(),
+    modelName: "fixture-model",
+  });
+  first.initialize();
+  const eventFile = path.join(stateRoot, "interrupted-event.json");
+  fs.writeFileSync(eventFile, `${JSON.stringify(bootEvent())}\n`);
+  runRuntime("perceive", [
+    "--state-dir",
+    first.stateDir,
+    "--event",
+    eventFile,
+  ]);
+
+  const second = new ControllerEngine({
+    stateRoot,
+    modelClient: new FixtureModelClient(),
+    modelName: "fixture-model",
+  });
+  const status = second.initialize();
+  assert.notEqual(second.stateDir, first.stateDir);
+  assert.equal(status.status, "ENTERED");
+  assert.equal(fs.existsSync(path.join(first.stateDir, "state.json")), true);
+});
diff --git a/server-tools/bingshuo-tcs-controller/server.mjs b/server-tools/bingshuo-tcs-controller/server.mjs
index 4358ac8..a99f03c 100644
--- a/server-tools/bingshuo-tcs-controller/server.mjs
+++ b/server-tools/bingshuo-tcs-controller/server.mjs
@@ -131,8 +131,11 @@ const server = http.createServer(async (request, response) => {
 });
 
 try {
-  engine.initialize();
+  const initialState = engine.initialize();
   runtime.source_loaded = true;
+  if (initialState.status === "AWAITING_HUMAN_BINGSHUO") {
+    runtime.phase = "PAUSED_FOR_HUMAN";
+  }
 } catch (error) {
   process.stderr.write(
     `${JSON.stringify({
@@ -151,6 +154,7 @@ server.listen(PORT, HOST, () => {
       port: PORT,
     })}\n`,
   );
+  if (runtime.phase === "PAUSED_FOR_HUMAN") return;
   eventQueue = handleEvent(bootEvent()).catch((error) => {
     runtime.phase = "FAILED_CLOSED";
     runtime.last_error = String(error.message || error).slice(0, 240);