I got kinda obsessed with observability a month ago and wired together a full stack for personal use.

https://github.com/simple10/agent-super-spy - llm proxy + http MiTM proxy + LLMetry + other goodies

https://github.com/simple10/agents-observe - fancier claude hooks dashboard

It started as a need to keep an eye on OpenClaw but is incredibly useful for really understanding any agent harness at the raw LLM request level.