asking because the sub skews heavily toward Claude Code and MCP setups and I think a lot of us are over here doing genuinely useful stuff that never gets posted.
I'll start. I built a little personal "decision log" doc where I dump big choices and Claude helps me write down the reasoning, then months later I can ask it what past-me was thinking. weirdly grounding.
what's yours? doesn't have to be impressive. the boring useful ones are the best ones.