hermes - 💡(How to fix) Fix delegation.model override ignored — subagents always inherit parent model

Summary

delegation.model in config.yaml is ignored — subagents always run on the parent agent's model instead of the configured delegation model.

Steps to reproduce

1. Configure delegation with a different model than the parent:

delegation:
  model: deepseek-v4-flash
  provider: deepseek

1. Parent agent runs on deepseek-v4-pro

2. Call delegate_task — the subagent reports model: "deepseek-v4-pro" instead of "deepseek-v4-flash"

Expected behavior

Subagents use delegation.model (deepseek-v4-flash).

Actual behavior

Subagents always use the parent's model (deepseek-v4-pro), ignoring the delegation config.

Investigation notes

• _resolve_delegation_credentials() correctly returns creds["model"] = "deepseek-v4-flash"
• _build_child_agent() passes model="deepseek-v4-flash" to AIAgent()
• AIAgent.__init__ / init_agent sets agent.model = "deepseek-v4-flash"
• agent._primary_runtime["model"] is correctly "deepseek-v4-flash"
• But after run_conversation(), child.model reads as "deepseek-v4-pro" (the parent's model)
• The child shares the parent's credential pool (_resolve_child_credential_pool returns parent pool when provider matches)
• Suspect: something in the conversation loop or credential pool rotation overwrites agent.model from the pool's primary model

Related

This interacts with the DeepSeek iteration enforcement feature (PR #___). The enforcement detects "flash" in model name to inject a shorter prompt for Flash models — but since subagents never actually run as Flash, the Flash-specific enforcement path is never triggered.

Environment

• Hermes Agent version: latest main
• Parent model: deepseek-v4-pro
• Delegation config model: deepseek-v4-flash
• Provider: deepseek