From cfabc29f74e1b154e2170b45eb1014c789dd7ac5 Mon Sep 17 00:00:00 2001
From: Felix <jinsnhs@yeah.net>
Date: Sun, 24 May 2026 12:47:02 +0800
Subject: [PATCH] fix(agent): propagate maxConcurrentSubagents config to
 SubagentManager
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The maxConcurrentSubagents field in AgentDefaults was never wired
through AgentLoop.from_config() → AgentLoop.__init__() →
SubagentManager.__init__(), causing it to always fall back to the
hardcoded default of 1 regardless of the user's config.
---
 nanobot/agent/loop.py     | 3 +++
 nanobot/agent/subagent.py | 7 ++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/nanobot/agent/loop.py b/nanobot/agent/loop.py
index e396212ab..f50583119 100644
--- a/nanobot/agent/loop.py
+++ b/nanobot/agent/loop.py
@@ -164,6 +164,7 @@ class AgentLoop:
         workspace: Path,
         model: str | None = None,
         max_iterations: int | None = None,
+        max_concurrent_subagents: int | None = None,
         context_window_tokens: int | None = None,
         context_block_limit: int | None = None,
         max_tool_result_chars: int | None = None,
@@ -262,6 +263,7 @@ class AgentLoop:
             restrict_to_workspace=restrict_to_workspace,
             disabled_skills=disabled_skills,
             max_iterations=self.max_iterations,
+            max_concurrent_subagents=max_concurrent_subagents,
             llm_wall_timeout_for_session=lambda sk: runner_wall_llm_timeout_s(self.sessions, sk),
         )
         self._unified_session = unified_session
@@ -347,6 +349,7 @@ class AgentLoop:
             workspace=config.workspace_path,
             model=model,
             max_iterations=defaults.max_tool_iterations,
+            max_concurrent_subagents=defaults.max_concurrent_subagents,
             context_window_tokens=context_window_tokens,
             context_block_limit=defaults.context_block_limit,
             max_tool_result_chars=defaults.max_tool_result_chars,
diff --git a/nanobot/agent/subagent.py b/nanobot/agent/subagent.py
index 54c0a4cb3..6b39f66d0 100644
--- a/nanobot/agent/subagent.py
+++ b/nanobot/agent/subagent.py
@@ -79,6 +79,7 @@ class SubagentManager:
         restrict_to_workspace: bool = False,
         disabled_skills: list[str] | None = None,
         max_iterations: int | None = None,
+        max_concurrent_subagents: int | None = None,
         llm_wall_timeout_for_session: Callable[[str | None], float | None] | None = None,
     ):
         defaults = AgentDefaults()
@@ -95,7 +96,11 @@ class SubagentManager:
             if max_iterations is not None
             else defaults.max_tool_iterations
         )
-        self.max_concurrent_subagents = defaults.max_concurrent_subagents
+        self.max_concurrent_subagents = (
+            max_concurrent_subagents
+            if max_concurrent_subagents is not None
+            else defaults.max_concurrent_subagents
+        )
         self.runner = AgentRunner(provider)
         self._llm_wall_timeout_for_session = llm_wall_timeout_for_session
         self._running_tasks: dict[str, asyncio.Task[None]] = {}