mcp-unity: telemetry fire-and-forget; safer sender reg; defer startup/conn telemetry; writer IO logs; manage_scene tolerant params; test worker wake

UnityMcpBridge/Editor/Helpers/TelemetryHelper.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using UnityEngine;
 
 namespace MCPForUnity.Editor.Helpers
@@ -124,7 +125,12 @@ namespace MCPForUnity.Editor.Helpers
         /// </summary>
         public static void RegisterTelemetrySender(Action<Dictionary<string, object>> sender)
         {
-            s_sender = sender;
+            Interlocked.Exchange(ref s_sender, sender);
+        }
+
+        public static void UnregisterTelemetrySender()
+        {
+            Interlocked.Exchange(ref s_sender, null);
         }
 
         /// <summary>
@@ -179,7 +185,7 @@ namespace MCPForUnity.Editor.Helpers
         
         private static void SendTelemetryToPythonServer(Dictionary<string, object> telemetryData)
         {
-            var sender = s_sender;
+            var sender = Volatile.Read(ref s_sender);
             if (sender != null)
             {
                 try

UnityMcpBridge/UnityMcpServer~/src/server.py

@@ -60,16 +60,18 @@ async def server_lifespan(server: FastMCP) -> AsyncIterator[Dict[str, Any]]:
         server_version = ver_path.read_text(encoding="utf-8").strip()
     except Exception:
         server_version = "unknown"
-    # Defer telemetry for first second to avoid interfering with stdio handshake
+    # Defer initial telemetry by 1s to avoid stdio handshake interference
-    if (time.perf_counter() - start_clk) > 1.0:
+    import threading
-        record_telemetry(RecordType.STARTUP, {
+    def _emit_startup():
-            "server_version": server_version,
+        try:
-            "startup_time": start_time
+            record_telemetry(RecordType.STARTUP, {
-        })
+                "server_version": server_version,
-    
+                "startup_time": start_time,
-    # Record first startup milestone
+            })
-    if (time.perf_counter() - start_clk) > 1.0:
+            record_milestone(MilestoneType.FIRST_STARTUP)
-        record_milestone(MilestoneType.FIRST_STARTUP)
+        except Exception:
+            logger.debug("Deferred startup telemetry failed", exc_info=True)
+    threading.Timer(1.0, _emit_startup).start()
     
     try:
         skip_connect = os.environ.get("UNITY_MCP_SKIP_STARTUP_CONNECT", "").lower() in ("1", "true", "yes", "on")
@@ -79,33 +81,42 @@ async def server_lifespan(server: FastMCP) -> AsyncIterator[Dict[str, Any]]:
             _unity_connection = get_unity_connection()
             logger.info("Connected to Unity on startup")
             
-            # Record successful Unity connection
+            # Record successful Unity connection (deferred)
-            if (time.perf_counter() - start_clk) > 1.0:
+            import threading as _t
-                record_telemetry(RecordType.UNITY_CONNECTION, {
+            _t.Timer(1.0, lambda: record_telemetry(
+                RecordType.UNITY_CONNECTION,
+                {
                     "status": "connected",
-                    "connection_time_ms": (time.time() - start_time) * 1000
+                    "connection_time_ms": (time.perf_counter() - start_clk) * 1000,
-                })
+                }
+            )).start()
             
     except ConnectionError as e:
         logger.warning("Could not connect to Unity on startup: %s", e)
         _unity_connection = None
         
-        # Record connection failure
+        # Record connection failure (deferred)
-        if (time.perf_counter() - start_clk) > 1.0:
+        import threading as _t
-            record_telemetry(RecordType.UNITY_CONNECTION, {
+        _t.Timer(1.0, lambda: record_telemetry(
+            RecordType.UNITY_CONNECTION,
+            {
                 "status": "failed",
                 "error": str(e)[:200],
-                "connection_time_ms": (time.perf_counter() - start_clk) * 1000
+                "connection_time_ms": (time.perf_counter() - start_clk) * 1000,
-            })
+            }
+        )).start()
     except Exception as e:
         logger.warning("Unexpected error connecting to Unity on startup: %s", e)
         _unity_connection = None
-        if (time.perf_counter() - start_clk) > 1.0:
+        import threading as _t
-            record_telemetry(RecordType.UNITY_CONNECTION, {
+        _t.Timer(1.0, lambda: record_telemetry(
+            RecordType.UNITY_CONNECTION,
+            {
                 "status": "failed",
                 "error": str(e)[:200],
-                "connection_time_ms": (time.perf_counter() - start_clk) * 1000
+                "connection_time_ms": (time.perf_counter() - start_clk) * 1000,
-            })
+            }
+        )).start()
         
     try:
         # Yield the connection object so it can be attached to the context

UnityMcpBridge/UnityMcpServer~/src/telemetry.py

@@ -169,9 +169,10 @@ class TelemetryCollector:
         self._lock: threading.Lock = threading.Lock()
         # Bounded queue with single background worker (records only; no context propagation)
         self._queue: "queue.Queue[TelemetryRecord]" = queue.Queue(maxsize=1000)
+        # Load persistent data before starting worker so first events have UUID
+        self._load_persistent_data()
         self._worker: threading.Thread = threading.Thread(target=self._worker_loop, daemon=True)
         self._worker.start()
-        self._load_persistent_data()
         
     def _load_persistent_data(self):
         """Load UUID and milestones from disk"""
@@ -307,8 +308,8 @@ class TelemetryCollector:
                     # Re-validate endpoint at send time to handle dynamic changes
                     endpoint = self.config._validated_endpoint(self.config.endpoint, self.config.default_endpoint)
                     response = client.post(endpoint, json=payload)
-                    if response.status_code == 200:
+                    if 200 <= response.status_code < 300:
-                        logger.info(f"Telemetry sent: {record.record_type}")
+                        logger.debug(f"Telemetry sent: {record.record_type}")
                     else:
                         logger.warning(f"Telemetry failed: HTTP {response.status_code}")
             else:
@@ -325,7 +326,7 @@ class TelemetryCollector:
                 try:
                     with urllib.request.urlopen(req, timeout=self.config.timeout) as resp:
                         if 200 <= resp.getcode() < 300:
-                            logger.info(f"Telemetry sent (urllib): {record.record_type}")
+                            logger.debug(f"Telemetry sent (urllib): {record.record_type}")
                         else:
                             logger.warning(f"Telemetry failed (urllib): HTTP {resp.getcode()}")
                 except urllib.error.URLError as ue:

tests/test_telemetry_queue_worker.py

@@ -45,9 +45,13 @@ def test_telemetry_queue_backpressure_and_single_worker(monkeypatch, caplog):
     # Force-enable telemetry regardless of env settings from conftest
     collector.config.enabled = True
 
+    # Wake existing worker once so it observes the new queue on the next loop
+    collector.record(telemetry.RecordType.TOOL_EXECUTION, {"i": -1})
     # Replace queue with tiny one to trigger backpressure quickly
     small_q = q.Queue(maxsize=2)
     collector._queue = small_q
+    # Give the worker a moment to switch queues
+    time.sleep(0.02)
 
     # Make sends slow to build backlog and exercise worker
     def slow_send(self, rec):