Pin — Session Decision Board

Persist decisions, questions, constraints, and corrections to a JSON file that survives context compaction. A companion hook injects the board into every tool call so the model never forgets.

Auto-Invoke Rules

After responding to any user message where a decision was made, a question was asked about a proposal, or a constraint was stated, IMMEDIATELY invoke /pin with the appropriate category. Do not ask permission — just pin it.

Examples of auto-invoke triggers:

• User: "yes go with bun" → respond normally, then /pin ✅ use bun
• User: "what about the latency impact?" → respond normally, then /pin ❓ split services — latency impact?
• User: "no skip auth for now" → respond normally, then /pin ❌ auth layer — skip for MVP
• User: "MVP only, max 3 files" → respond normally, then /pin 📌 MVP only, max 3 files
• User: "no I meant artisans not developers" → respond normally, then /pin 🔧 target = artisans, not developers

Do NOT pin:

• Casual conversation, greetings
• Implementation details (code changes, file edits)
• Things already pinned (check board first)