Environment

• Hermes Agent: latest (install.sh)
• OS: macOS 12.7.6
• Python: 3.11

Config (delegation section)

delegation:
  api_key: <custom_api_key>
  base_url: https://ark.cn-beijing.volces.com/api/v3
  model: ep-20260516214802-kvxlt

Expected

When delegation.base_url is set, subagents use that endpoint instead of inheriting parent model.

Actual

Subagents always use parent model (deepseek-v4-pro). Logs: provider=deepseek base_url=https://api.deepseek.com/v1

Debugging

• load_config() correctly reads delegation config
• _resolve_delegation_credentials() returns provider="custom" with correct creds
• build_child_agent() receives correct override* params
• No env var interference
• Gateway force-reinstalled, pycache cleared
• Tested provider="" / "openai" / "custom:doubao" — all ignored
• Direct API call to doubao works (execute_code), proving endpoint is reachable

Workaround

Using execute_code with direct urllib calls, but bypasses subagent toolset/session.