This is interesting. It would be even better if ones coding agent also got better at its coding abilities every night. Otherwise, agents might re-introduce the same class of bugs that your nightly improvements keep reacting to.

This would require logging agent actions during the day, analyzing it at night, identifying things the coding agent could do better, and update its AGENTS.md memory (relatively easy) or fine-tune the agent (if local LLM, and the fine-tuning cost was acceptable).

It would be nice that when a person corrects an agent's mistake this was captured and fed back into a nightly agent improving process.