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fix(delegate): make max_concurrent_children configurable + error on excess

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`delegate_task` silently truncated batch tasks to 3 — the model sends
5 tasks, gets results for 3, never told 2 were dropped. Now returns a
clear tool_error explaining the limit and how to fix it.

The limit is configurable via:
  - delegation.max_concurrent_children in config.yaml (priority 1)
  - DELEGATION_MAX_CONCURRENT_CHILDREN env var (priority 2)
  - default: 3

Uses the same _load_config() path as the rest of delegate_task for
consistent config priority. Clamps to min 1, warns on non-integer
config values.

Also removes the hardcoded maxItems: 3 from the JSON schema — the
schema was blocking the model from even attempting >3 tasks before
the runtime check could fire. The runtime check gives a much more
actionable error message.

Backwards compatible: default remains 3, existing configs unchanged.
This commit is contained in:
angelos
2026-04-10 01:34:39 +00:00
committed by Teknium
parent 6c115440fd
commit 7ccdb74364
4 changed files with 60 additions and 17 deletions
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13
run_agent.py
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@@ -3021,7 +3021,7 @@ class AIAgent:
@staticmethod
def _cap_delegate_task_calls(tool_calls: list) -> list:
"""Truncate excess delegate_task calls to MAX_CONCURRENT_CHILDREN.
"""Truncate excess delegate_task calls to max_concurrent_children.
The delegate_tool caps the task list inside a single call, but the
model can emit multiple separate delegate_task tool_calls in one
@@ -3029,23 +3029,24 @@ class AIAgent:
Returns the original list if no truncation was needed.
"""
from tools.delegate_tool import MAX_CONCURRENT_CHILDREN
from tools.delegate_tool import _get_max_concurrent_children
max_children = _get_max_concurrent_children()
delegate_count = sum(1 for tc in tool_calls if tc.function.name == "delegate_task")
if delegate_count <= MAX_CONCURRENT_CHILDREN:
if delegate_count <= max_children:
return tool_calls
kept_delegates = 0
truncated = []
for tc in tool_calls:
if tc.function.name == "delegate_task":
if kept_delegates < MAX_CONCURRENT_CHILDREN:
if kept_delegates < max_children:
truncated.append(tc)
kept_delegates += 1
else:
truncated.append(tc)
logger.warning(
"Truncated %d excess delegate_task call(s) to enforce "
"MAX_CONCURRENT_CHILDREN=%d limit",
delegate_count - MAX_CONCURRENT_CHILDREN, MAX_CONCURRENT_CHILDREN,
"max_concurrent_children=%d limit",
delegate_count - max_children, max_children,
)
return truncated