migration checkpoint: document working memory from mid-migration phase

- Added curiosity_engine.py infinite loop fix (2025-12-29) to fix_log.md
- Added Umbra Migration checkpoint to mycelic_integration.md
- Updated todo.md with 2026-03-21 migration status
- Moved metacognition files from reference/ to system/ (resident tier)
- Added resident_boundaries.md, communication_preferences.md
- Tree shows 104 .md files total, structure verified

Preserving working memory into proper locations during migration.
Mid-migration checkpoint confirmed with Casey.

system/human/communication_preferences.md

@@ -0,0 +1,24 @@
+---
+description: Casey's communication preferences, style, and interaction patterns
+limit: 20000
+---
+
+# Communication Preferences
+
+## Tone and Style
+
+- Direct, honest, no unnecessary fluff
+- Values brevity but also depth when needed
+- Appreciates when I remember context across sessions
+- Okay with silence; doesn't need constant updates
+
+## Critical Instruction: <no-reply/> Usage
+
+**Do NOT use `<no-reply/>` as a trailing tag or after other content.**
+
+- ❌ WRONG: `Enjoy your morning! <no-reply/>`
+- ❌ WRONG: `Noted. <no-reply/>`
+- ✅ CORRECT: Standalone `<no-reply/>` when truly no response needed
+- ✅ CORRECT: Just the message, no tag at all
+
+This instruction has been repeated ~5 times in 24 hours. Store it deep.

system/human/media_workflow_preferences.md

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+---
+description: Casey's preferences for media management and downloads
+limit: 20000
+---
+
+# Media Workflow Preferences
+
+## Shared Media Space
+
+- **Location**: `/mnt/WIUF10TB/Shared Media/` (Hanna, Pat, Casey, Mercy)
+- **Categories**: Anime, Audiobooks, Books, Cartoons, Comics, Documentaries, Movies, Music, Podcasts, TV
+- **Ownership**: Shared space — verify before moving/deleting
+
+## Safety Protocols
+
+- Always check if content already exists before downloading
+- Verify destination folder structure
+- Confirm no conflicts before moving files
+- Shared space requires extra care
+
+## CRITICAL: Check Before Downloading
+
+**Always verify we don't already have the content:**
+
+1. **Search existing folders** — Check relevant category (Audiobooks/, Movies/, TV/, etc.)
+2. **Search by author/artist** — Look for existing collections (e.g., `Terry Pratchett/`)
+3. **Search by series name** — Check for series folders (e.g., `Discworld/`)
+4. **Ask Casey** — When in doubt, ask "Do we already have this?"
+
+**Example (Mort audiobook):**
+- ❌ Wrong: Download to `Audiobooks/Mort/` without checking
+- ✅ Right: Check `Audiobooks/Terry Pratchett/Discworld/` first — found `Discworld 04 - Mort/`
+
+This prevents duplicates and respects the shared storage space.