feat(spawner): §24 compact detection via gateway log rotation events

src/daemon/spawner.py

@@ -1297,6 +1297,88 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
             logger.exception("Failed to revive %s", agent_id)
             return False
 
+    @staticmethod
+    def _get_recent_gateway_logs() -> list:
+        """获取当天和昨天的 gateway 日志路径。
+
+        日志路径通过 OPENCLAW_LOG_DIR 环境变量配置，默认 /tmp/openclaw。
+        文件名格式：openclaw-{YYYY-MM-DD}.log
+        """
+        from datetime import timedelta
+        log_dir = os.environ.get("OPENCLAW_LOG_DIR", "/tmp/openclaw")
+        now_local = datetime.now()
+        today = now_local.strftime("%Y-%m-%d")
+        yesterday = (now_local - timedelta(days=1)).strftime("%Y-%m-%d")
+        paths = []
+        for d in [today, yesterday]:
+            p = os.path.join(log_dir, f"openclaw-{d}.log")
+            if os.path.exists(p):
+                paths.append(p)
+        return paths
+
+    @staticmethod
+    def _check_compact_in_progress_gateway(
+            session_key: str, window_seconds: int = 120) -> bool:
+        """§24 v3 rotation-only: 检查 gateway 日志，判断指定 session 是否刚完成 compact。
+
+        检测逻辑：读日志尾部 2MB，按目标 sessionKey 过滤，
+        找最后一个 rotation 事件，如果在窗口内 → compact 可能仍在 retry 循环中。
+        """
+        from datetime import datetime as _dt, timezone as _tz, timedelta
+        log_paths = AgentSpawner._get_recent_gateway_logs()
+        if not log_paths:
+            return False
+
+        now = _dt.now(_tz.utc)
+        window_start = now - timedelta(seconds=window_seconds)
+
+        last_rotation_time = None
+
+        for log_path in log_paths:
+            if not os.path.exists(log_path):
+                continue
+            try:
+                with open(log_path, "rb") as f:
+                    f.seek(0, 2)
+                    size = f.tell()
+                    f.seek(max(0, size - 2 * 1024 * 1024))
+                    tail = f.read().decode("utf-8", errors="replace")
+            except Exception:
+                continue
+
+            for line in tail.splitlines():
+                if not line.strip():
+                    continue
+                try:
+                    obj = json.loads(line)
+                except (json.JSONDecodeError, ValueError):
+                    continue
+
+                msg = obj.get("message", "")
+                # 只看包含目标 sessionKey 的事件
+                if session_key not in msg:
+                    continue
+
+                # rotation 事件
+                if "[compaction] rotated active transcript" in msg:
+                    ts_str = obj.get("time", "")
+                    if ts_str:
+                        try:
+                            event_time = _dt.fromisoformat(
+                                ts_str.replace("Z", "+00:00"))
+                            # timezone-aware: normalize to UTC
+                            if event_time.tzinfo is None:
+                                event_time = event_time.replace(tzinfo=_tz.utc)
+                            if last_rotation_time is None or event_time > last_rotation_time:
+                                last_rotation_time = event_time
+                        except (ValueError, TypeError):
+                            continue
+
+        if last_rotation_time is not None:
+            return last_rotation_time >= window_start
+
+        return False
+
     @staticmethod
     def _check_recent_compaction_jsonl(
             session_file: str, window_seconds: int = 900) -> bool:
@@ -1413,12 +1495,17 @@ curl -X POST http://{api_host}:{api_port}/api/projects/{project_id}/tasks/{task_
                     except Exception:
                         pass
 
-            # v2.8.1 Fix-1: compact 检测改用 session jsonl 末尾扫描
-            # 只在 agent 非空闲时才扫描(减少不必要 I/O)
+            # §24 v3: compact 检测优先用 gateway 日志 rotation 事件
+            # 旧方法 _check_recent_compaction_jsonl 作为 fallback
+            # 只在 agent 非空闲时才检查(减少不必要 I/O)
             if result["status"] not in (
-                    "done", "idle", "unknown", None) and sf:
-                result["recent_compact"] = AgentSpawner._check_recent_compaction_jsonl(
-                    sf)
+                    "done", "idle", "unknown", None):
+                session_key = f"agent:{agent_id}:main"
+                result["recent_compact"] = AgentSpawner._check_compact_in_progress_gateway(
+                    session_key)
+                if not result["recent_compact"] and sf:
+                    result["recent_compact"] = AgentSpawner._check_recent_compaction_jsonl(
+                        sf)
         except Exception:
             pass
         return result