perf(subagent): add atask EXIT breakdown timing log

surfsense_backend/app/agents/multi_agent_chat/middleware/main_agent/checkpointed_subagent_middleware/task_tool.py

@@ -9,6 +9,7 @@ re-raises any new pending interrupt back to the parent.
 from __future__ import annotations
 
 import logging
+import time
 from typing import Annotated, Any, NoReturn
 
 from deepagents.middleware.subagents import TASK_TOOL_DESCRIPTION
@@ -19,6 +20,8 @@ from langchain_core.tools import StructuredTool
 from langgraph.errors import GraphInterrupt
 from langgraph.types import Command, Interrupt
 
+from app.utils.perf import get_perf_logger
+
 from .config import (
     consume_surfsense_resume,
     drain_parent_null_resume,
@@ -35,6 +38,7 @@ from .resume import (
 )
 
 logger = logging.getLogger(__name__)
+_perf_log = get_perf_logger()
 
 
 def _reraise_stamped_subagent_interrupt(
@@ -209,6 +213,7 @@ def build_task_tool_with_parent_config(
         ],
         runtime: ToolRuntime,
     ) -> str | Command:
+        atask_start = time.perf_counter()
         logger.info(
             "[hitl_route] atask ENTRY: subagent_type=%r tool_call_id=%s",
             subagent_type,
@@ -230,8 +235,10 @@ def build_task_tool_with_parent_config(
         # Resume bridge — see ``task`` above.
         pending_id: str | None = None
         pending_value: Any = None
+        aget_state_elapsed = 0.0
         aget_state = getattr(subagent, "aget_state", None)
         if callable(aget_state):
+            aget_state_start = time.perf_counter()
             try:
                 snapshot = await aget_state(sub_config)
                 pending_id, pending_value = get_first_pending_subagent_interrupt(
@@ -248,32 +255,78 @@ def build_task_tool_with_parent_config(
                     "Subagent aget_state failed; falling back to fresh ainvoke",
                     exc_info=True,
                 )
+            finally:
+                aget_state_elapsed = time.perf_counter() - aget_state_start
 
-        if pending_value is not None:
-            resume_value = consume_surfsense_resume(runtime)
-            if resume_value is None:
-                raise RuntimeError(
-                    f"Subagent {subagent_type!r} has a pending interrupt but no "
-                    "surfsense_resume_value on config; resume bridge is broken."
-                )
-            expected = hitlrequest_action_count(pending_value)
-            resume_value = fan_out_decisions_to_match(resume_value, expected)
-            # Prevent the parent's resume payload from leaking into subagent
-            # interrupts via langgraph's parent_scratchpad fallback.
-            drain_parent_null_resume(runtime)
-            try:
-                result = await subagent.ainvoke(
-                    build_resume_command(resume_value, pending_id),
-                    config=sub_config,
-                )
-            except GraphInterrupt as gi:
-                _reraise_stamped_subagent_interrupt(gi, runtime.tool_call_id)
-        else:
-            try:
-                result = await subagent.ainvoke(subagent_state, config=sub_config)
-            except GraphInterrupt as gi:
-                _reraise_stamped_subagent_interrupt(gi, runtime.tool_call_id)
-        return _return_command_with_state_update(result, runtime.tool_call_id)
+        invoke_path = "resume" if pending_value is not None else "fresh"
+        ainvoke_start = time.perf_counter()
+        ainvoke_outcome = "ok"
+        try:
+            if pending_value is not None:
+                resume_value = consume_surfsense_resume(runtime)
+                if resume_value is None:
+                    raise RuntimeError(
+                        f"Subagent {subagent_type!r} has a pending interrupt but no "
+                        "surfsense_resume_value on config; resume bridge is broken."
+                    )
+                expected = hitlrequest_action_count(pending_value)
+                resume_value = fan_out_decisions_to_match(resume_value, expected)
+                # Prevent the parent's resume payload from leaking into subagent
+                # interrupts via langgraph's parent_scratchpad fallback.
+                drain_parent_null_resume(runtime)
+                try:
+                    result = await subagent.ainvoke(
+                        build_resume_command(resume_value, pending_id),
+                        config=sub_config,
+                    )
+                except GraphInterrupt as gi:
+                    ainvoke_outcome = "interrupted"
+                    _perf_log.info(
+                        "[hitl_route] atask EXIT subagent_type=%r path=%s outcome=%s "
+                        "aget_state=%.3fs ainvoke=%.3fs total=%.3fs",
+                        subagent_type,
+                        invoke_path,
+                        ainvoke_outcome,
+                        aget_state_elapsed,
+                        time.perf_counter() - ainvoke_start,
+                        time.perf_counter() - atask_start,
+                    )
+                    _reraise_stamped_subagent_interrupt(gi, runtime.tool_call_id)
+            else:
+                try:
+                    result = await subagent.ainvoke(subagent_state, config=sub_config)
+                except GraphInterrupt as gi:
+                    ainvoke_outcome = "interrupted"
+                    _perf_log.info(
+                        "[hitl_route] atask EXIT subagent_type=%r path=%s outcome=%s "
+                        "aget_state=%.3fs ainvoke=%.3fs total=%.3fs",
+                        subagent_type,
+                        invoke_path,
+                        ainvoke_outcome,
+                        aget_state_elapsed,
+                        time.perf_counter() - ainvoke_start,
+                        time.perf_counter() - atask_start,
+                    )
+                    _reraise_stamped_subagent_interrupt(gi, runtime.tool_call_id)
+            ainvoke_elapsed = time.perf_counter() - ainvoke_start
+        except GraphInterrupt:
+            raise
+
+        merge_start = time.perf_counter()
+        cmd = _return_command_with_state_update(result, runtime.tool_call_id)
+        merge_elapsed = time.perf_counter() - merge_start
+        _perf_log.info(
+            "[hitl_route] atask EXIT subagent_type=%r path=%s outcome=%s "
+            "aget_state=%.3fs ainvoke=%.3fs merge=%.3fs total=%.3fs",
+            subagent_type,
+            invoke_path,
+            ainvoke_outcome,
+            aget_state_elapsed,
+            ainvoke_elapsed,
+            merge_elapsed,
+            time.perf_counter() - atask_start,
+        )
+        return cmd
 
     return StructuredTool.from_function(
         name="task",