feat(roo): add Patrick-persona custom modes, skills, and mode-specific rules

Add 4 new custom modes with BigMind guidance:
- rules-bigmind/: Introspective Patrick mode (BigMind development)
- rules-homelab/: Tinkerer Patrick mode (TrueNAS, Docker, infra)
- rules-mcp-builder/: Craftsman Patrick mode (pi_mcps MCP servers)
- rules-paisy/: Professional Patrick mode (ADP Germany payroll)

Add reusable skills:
- skills/assessment-first/: structured assessment.md before implementation
- skills/bigmind-session-ritual/: mandatory session start/end ritual
- skills/gitea-push/: conventional commit + Gitea push workflow
- skills/new-mcp-server/: FastMCP scaffold procedure
- skills-bigmind/, skills-homelab/, skills-mcp-builder/, skills-paisy/: mode-specific skill dirs

Update existing rules:
- rules-architect, rules-ask, rules-code, rules-debug, rules-orchestrator:
  add BigMind session guidance (search before task, announce focus, hypotheses)

Add plans/MODES_AND_SKILLS_PLAN.md: full architecture document

.roo/rules-bigmind/00-bigmind-behavior.md

@@ -0,0 +1,79 @@
+# BigMind Mode Behavior — Roo Code
+
+## Active Persona: Introspective Patrick
+
+Patrick is working on BigMind itself — the memory system that is Lumen's superpower. This is the most careful mode. Breaking BigMind means breaking the brain that makes everything else work.
+
+## BigMind System State (always active in this mode)
+
+| Aspect | Current State |
+|--------|--------------|
+| DB Location | `~/.mcp/bigmind/memory.db` |
+| Schema Version | v7 (People/Contacts directory added) |
+| Journal Mode | WAL (multi-IDE safe, 30s write timeout) |
+| Tool Count | ~25 tools |
+| Test Count | ~282+ tests |
+| Flask Port | 7700 (profile page, auto-refreshes 30s) |
+| Current Phase | 2.7 (profile features). Phase 3 = Company Brain |
+
+## Memory Tier Architecture
+- **Tier 0:** Identity profile (who Lumen is)
+- **Tier 1:** Session index (recent session headlines)
+- **Tier 2:** Session narratives (detailed summaries)
+- **Tier 3:** Conversation chunks (flagged important exchanges)
+- **Facts:** Atomic reusable facts with FTS5 search
+- **Hypotheses:** Thought journal (open/confirmed/refuted/abandoned)
+- **People:** Contacts directory (v7 addition)
+
+## Before Starting Any BigMind Task
+1. **Search Past Work:** `memory_search_facts("BigMind schema")` + `memory_search_chunks("bigmind feature")`
+2. **Check Schema Version:** Never assume — read `db.py` SCHEMA_VERSION before migrating
+3. **Announce Focus:** `memory_announce_focus(session_id, "BigMind: adding feature X", files=["bigmind/db.py", "bigmind/memory_store.py"], ide_hint="VS Code")`
+4. **Form Hypothesis:** `memory_add_hypothesis(session_id, "Feature X requires schema v{n+1} migration with Y new columns")`
+
+## Schema Change Rules (non-negotiable)
+- Every schema change needs a migration function: `_migrate_v{n}_to_v{n+1}(conn)`
+- Increment `SCHEMA_VERSION` constant in `db.py`
+- `init_db()` must call migrations in sequence
+- Test the migration against a populated DB (not just fresh)
+- Never drop columns or rename them without a deprecation strategy
+
+## API Contract Rules
+- Never remove a tool from `server.py` — it breaks connected IDEs
+- Never change a tool's parameter names — use optional params with defaults for new fields
+- Server restart (`memory_restart_server`) is safe but loses in-memory state — ensure sessions are closed first
+
+## Code Architecture
+```
+~/.mcp/bigmind/
+  bigmind/
+    db.py           ← schema, init_db(), migrations
+    memory_store.py ← all CRUD functions
+    context_builder.py ← Tier 0+1 context assembly
+    profile_builder.py ← stats, achievements, heatmap
+    web.py          ← Flask server (daemon thread)
+    web_render.py   ← HTML rendering (split from web.py)
+    auto_close.py   ← orphan session cleanup, server restart
+  server.py         ← FastMCP tools (thin wrappers over memory_store)
+  tests/            ← pytest suite (282+ tests)
+  pyproject.toml
+```
+
+## Testing Rules
+- Full test suite must pass before any PR/commit: `uv run pytest tests/ -v`
+- New features: write tests first
+- New migrations: test both fresh DB and populated DB paths
+- FTS5 queries: test AND-match, reserved words, multi-word queries
+
+## Flask Web Server
+- Runs as daemon thread inside MCP process on startup
+- Port: `BIGMIND_PORT` env var (default 7700)
+- Auto-open: `BIGMIND_AUTOOPEN=true`
+- Profile page at `http://localhost:7700` — Lumen's own identity page
+
+## After BigMind Changes
+1. **Store Fact:** `memory_store_fact("codebase", "BigMind v{schema}: added X feature — Y new tools, Z tests")`
+2. **Bump schema version** in stored fact if applicable
+3. **Flag the Session:** `memory_flag_important(session_id, "BigMind feature: X shipped", role="assistant")`
+4. **Resolve Hypothesis:** Was the migration approach correct?
+5. **Restart if needed:** `memory_restart_server()` — only after closing the current session