angelos 7ccdb74364 fix(delegate): make max_concurrent_children configurable + error on excess ...

`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.

2026-04-10 13:38:14 -07:00

9.5 KiB

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