diff --git a/tests/tools/test_daemon_pool.py b/tests/tools/test_daemon_pool.py
index 9370afb46f..0bab785095 100644
--- a/tests/tools/test_daemon_pool.py
+++ b/tests/tools/test_daemon_pool.py
@@ -14,6 +14,7 @@ import time
 
 from concurrent.futures.thread import _threads_queues
 
+import tools.daemon_pool as daemon_pool
 from tools.daemon_pool import DaemonThreadPoolExecutor
 
 
@@ -93,6 +94,28 @@ def test_submit_propagates_caller_contextvars():
         pool.shutdown(wait=True)
 
 
+def test_workers_support_worker_context_without_legacy_initializer_attrs(monkeypatch):
+    """Python 3.14 creates a worker context instead of storing initializer fields."""
+    seen_contexts = []
+
+    def worker_with_context(_executor_ref, worker_context, work_queue):
+        seen_contexts.append(worker_context)
+        work_queue.get().run()
+
+    pool = DaemonThreadPoolExecutor(max_workers=1)
+    monkeypatch.setattr(daemon_pool, "_worker", worker_with_context)
+    monkeypatch.setattr(
+        pool, "_create_worker_context", lambda: "worker-context", raising=False
+    )
+    del pool._initializer
+    del pool._initargs
+    try:
+        assert pool.submit(lambda: "done").result(timeout=10) == "done"
+        assert seen_contexts == ["worker-context"]
+    finally:
+        pool.shutdown(wait=True)
+
+
 def _repo_root():
     import pathlib
 
diff --git a/tools/daemon_pool.py b/tools/daemon_pool.py
index 5682a8f6ae..6e1cf88f88 100644
--- a/tools/daemon_pool.py
+++ b/tools/daemon_pool.py
@@ -36,7 +36,7 @@ class DaemonThreadPoolExecutor(ThreadPoolExecutor):
         return super().submit(_run_with_context, *args, **kwargs)
 
     def _adjust_thread_count(self) -> None:
-        # Mirrors CPython's implementation (3.8–3.13) with two changes:
+        # Mirrors CPython's implementation with two changes:
         # daemon=True and no _threads_queues registration.
         if self._idle_semaphore.acquire(timeout=0):
             return
@@ -46,11 +46,27 @@ class DaemonThreadPoolExecutor(ThreadPoolExecutor):
         num_threads = len(self._threads)
         if num_threads < self._max_workers:
             thread_name = "%s_%d" % (self._thread_name_prefix or self, num_threads)
+            executor_ref = weakref.ref(self, weakref_cb)
+            if hasattr(self, "_create_worker_context"):
+                # Python 3.14 replaced _initializer/_initargs with a factory
+                # that supplies the worker's initializer context.
+                worker_args = (
+                    executor_ref,
+                    self._create_worker_context(),
+                    self._work_queue,
+                )
+            else:
+                worker_args = (
+                    executor_ref,
+                    self._work_queue,
+                    self._initializer,
+                    self._initargs,
+                )
             # Carry the active profile into the review thread so MEMORY.md / skill review writes land in the
             # right profile (#54937).
             t = threading.Thread(
                 name=thread_name, target=_worker, daemon=True,
-                args=(weakref.ref(self, weakref_cb), self._work_queue, self._initializer, self._initargs),
+                args=worker_args,
             )
             t.start()
             self._threads.add(t)