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migration.md

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+# Migration Guide - Proactivity
+
+## v1.0.1 Architecture Update
+
+This update keeps the same home folder, `~/proactivity/`, and preserves existing files.
+The new version adds active-state files for recovery and follow-through.
+
+### Before
+
+- `~/proactivity/memory.md`
+- `~/proactivity/domains/`
+- `~/proactivity/patterns.md`
+- `~/proactivity/log.md`
+
+### After
+
+- `~/proactivity/memory.md`
+- `~/proactivity/session-state.md`
+- `~/proactivity/heartbeat.md`
+- `~/proactivity/patterns.md`
+- `~/proactivity/log.md`
+- `~/proactivity/domains/`
+- `~/proactivity/memory/working-buffer.md`
+
+## Safe Migration
+
+1. Create the new files without deleting the old ones:
+```bash
+mkdir -p ~/proactivity/memory
+touch ~/proactivity/session-state.md
+touch ~/proactivity/heartbeat.md
+touch ~/proactivity/memory/working-buffer.md
+```
+
+2. Keep `memory.md`, `patterns.md`, and `log.md` exactly as they are.
+
+3. If old proactive rules live in free-form notes, copy them into the new sections in `memory.md`.
+
+4. Start writing only live task state to session state and working buffer.
+
+5. Do not delete or rename any legacy file unless the user explicitly asks for cleanup later.