My agent kept forgetting decisions, so I made it keep a notes file
A builder solved agent amnesia between sessions with a simple notes.md file in the project: decisions, dead ends, and open loops, read at run start and appended at run end. The surprise insight: dead ends turned out to be the most valuable section, killing repeated bad suggestions. The discussion converges on a practical rule — the notes must record the 'why' behind each decision, not just the outcome.