Bump pydocket to 0.16.2 for task cancellation support

Adds a test that verifies task cancellation actually interrupts running
coroutines (they receive CancelledError) rather than just marking the task
as cancelled in Redis while the coroutine continues to completion.

This requires pydocket >= 0.16.2 which added best-effort cancellation via
Redis pub/sub signaling to workers.

Closes #2679

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -10,7 +10,7 @@ dependencies = [
     "mcp>=1.24.0",
     "openapi-pydantic>=0.5.1",
     "platformdirs>=4.0.0",
-    "pydocket>=0.16.0",
+    "pydocket>=0.16.2",
     "rich>=13.9.4",
     "cyclopts>=4.0.0",
     "authlib>=1.6.5",

tests/server/tasks/test_task_methods.py

@@ -172,3 +172,46 @@ async def test_task_cancellation_workflow(endpoint_server):
         # Task should be in cancelled state
         status = await task.status()
         assert status.status == "cancelled"
+
+
+async def test_task_cancellation_interrupts_running_coroutine(endpoint_server):
+    """Task cancellation actually interrupts the running coroutine.
+
+    This verifies that when a task is cancelled, the underlying asyncio
+    coroutine receives CancelledError rather than continuing to completion.
+    Requires pydocket >= 0.16.2.
+
+    See: https://github.com/jlowin/fastmcp/issues/2679
+    """
+    started = asyncio.Event()
+    was_interrupted = asyncio.Event()
+    completed_normally = asyncio.Event()
+
+    @endpoint_server.tool(task=True)
+    async def interruptible_tool() -> str:
+        started.set()
+        try:
+            await asyncio.sleep(60)
+            completed_normally.set()
+            return "completed"
+        except asyncio.CancelledError:
+            was_interrupted.set()
+            raise
+
+    async with Client(endpoint_server) as client:
+        task = await client.call_tool("interruptible_tool", {}, task=True)
+
+        # Wait for the tool to actually start executing
+        await asyncio.wait_for(started.wait(), timeout=5.0)
+
+        # Cancel the task
+        await task.cancel()
+
+        # Wait for cancellation to propagate
+        await asyncio.wait_for(was_interrupted.wait(), timeout=5.0)
+
+        # The coroutine should have been interrupted, not completed normally
+        assert was_interrupted.is_set(), "Task was not interrupted by cancellation"
+        assert not completed_normally.is_set(), (
+            "Task completed instead of being cancelled"
+        )

uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 3
+revision = 2
 requires-python = ">=3.10"
 resolution-markers = [
     "python_full_version >= '3.11'",
@@ -752,7 +752,7 @@ requires-dist = [
     { name = "platformdirs", specifier = ">=4.0.0" },
     { name = "py-key-value-aio", extras = ["disk", "keyring", "memory"], specifier = ">=0.3.0,<0.4.0" },
     { name = "pydantic", extras = ["email"], specifier = ">=2.11.7" },
-    { name = "pydocket", specifier = ">=0.16.0" },
+    { name = "pydocket", specifier = ">=0.16.2" },
     { name = "pyperclip", specifier = ">=1.9.0" },
     { name = "python-dotenv", specifier = ">=1.1.0" },
     { name = "rich", specifier = ">=13.9.4" },
@@ -1775,7 +1775,7 @@ wheels = [
 
 [[package]]
 name = "pydocket"
-version = "0.16.0"
+version = "0.16.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "cloudpickle" },
@@ -1792,9 +1792,9 @@ dependencies = [
     { name = "typer" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f2/d3/ff57fb8ba8180c621b17270a272ee8821a64962887c42962c5a342ab82a9/pydocket-0.16.0.tar.gz", hash = "sha256:675e829a7ea6e978fdbbe0ace342f24c8ec7cf8ed5980694215418e59ff86005", size = 286316, upload-time = "2025-12-18T15:14:53.139Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/f4/b6/b9b5af725be7ffb195750e1cbe0ad4aa413858f16af258a49ad84cff82ac/pydocket-0.16.2.tar.gz", hash = "sha256:b48e59ad247cbf23fd7064cd765b75e5b870451a7778afa3b208b3aae6474c1f", size = 295623, upload-time = "2025-12-23T19:24:46.751Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/4e/74/dcf56132e03a24e2591c5f2391902c871e5f1248e0fc175b9f1792e4afaf/pydocket-0.16.0-py3-none-any.whl", hash = "sha256:3d7d0a805bcb68a3a03d96d3c6ba8e607584ed14b0fe3879333a8fff652dda92", size = 61064, upload-time = "2025-12-18T15:14:51.506Z" },
+    { url = "https://files.pythonhosted.org/packages/ef/33/81132e8ca41e11000807cc1f457a391d5a364dd1eeb7de40f2ff971301bc/pydocket-0.16.2-py3-none-any.whl", hash = "sha256:044a74deec2062c305bf1d452a1348a4e3739b3a2cf0a411ca1e11368cef5baf", size = 66812, upload-time = "2025-12-23T19:24:45.643Z" },
 ]
 
 [[package]]