I had the model write up a pi extension for logging the transcript to the syslog, and all on its own initiative it spawned a subagent to generate test output. It decided to spawn a lighter model for this trivial task, apparently unaware that I can only fit one model at a time so my llama-server ended up thrashing to the lighter model then back to the original model. My own personal n=2 semi- rogue swarm

What would you say is a good harness with subagents?

I found the MCP extension for Pi to work fine.