Capturing the "why" behind every Claude Code commit: building a memory layer with MCP and hooks

A week ago I opened a piece of code Claude Code had written for me. Looked at it and asked: "Wait — why did I tell it to do it this way?" I couldn't remember. I asked Claude again. The session was already closed. The new agent shrugged: "Not sure why, but merging these seems fine." I blamed my memory at first. Started taking notes in Notion. Quit within a week — when you commit 30+ times a day with AI, hand-curated notes don't scale. Eventually I had to admit it: this isn't a memory problem....