I built a tool for this: https://farero.ai It stores every single chat regardless of ai provider in an indexed sqllite database on my mac and it injects a couple of extra mcp tools + a tiny prompt into codex/claude/opencode so the agent can search every single decision / chat I've ever had.

I've also connected grok bot to this app, and i set up one for each project that can launch coding worktrees, monitor analytics for bugs, etc.

Lets me run everything pretty hands off, I mostly jump in to review PRs or make decisions