blader/napkin

This skill maintains a per-repo runbook at `.claude/napkin.md` that Claude reads and curates at the beginning of every session. It captures recurring gotchas, user directives, and non-obvious tactics — never session logs or one-off mistakes — and organizes them into priority-sorted categories with a strict ten-item cap per category. Each entry includes a date and an explicit "Do instead" action. The effect is that future sessions skip the repetition of past errors and start with accumulated knowledge already applied.