Manage what Builder Stack has learned across sessions. Search, add, prune, and export project-specific patterns, pitfalls, and preferences. Also tunes per-question interruption preferences (`/memory tune <id> never-ask`) that skills honor via `skills/memory/question-registry.md`, with a user-origin gate that refuses writes sourced from tool output, file reads, or PR bodies. Invoke when the user wants to review learnings, save a pattern, search for prior decisions, silence a repeat question, or clean up accumulated knowledge.