test(mcp): Villa Azul + 10-agent deep verification

Builds a larger, richer house than Casa del Sol via MCP save_scene
(no injection hack), then dispatches 10 parallel verifiers across
schema, geometry, dimensions, openings, HTTP, page render,
parentage, round-trip, spatial, visual.

Villa Azul — 56 nodes, validate_scene=true, 44KB on disk:
- 15x10m building envelope (vs Casa del Sol's 12x8)
- 9 interior zones (master bed/bath, bed 2/3, shared bath,
  living/dining, kitchen, entry hall, corridor)
- 10 doors + 12 windows (all cut successfully)
- 4 exterior zones (pool 8x4 + basin slab at -2m, outdoor kitchen,
  driveway, back patio)
- 5 rail-style fences (vs Casa del Sol's privacy) with 2m entrance gap

Verification: 108 checks, 104 PASS, 4 findings:
- V1 schema: 56/56
- V2 geometry: 7/7 (perimeter closes, interior T-junctions, no
  zone overlaps, fence gap verified)
- V3 dimensions: 13/13 zone areas exact (1 spec mismatch on site
  polygon default, not a build bug)
- V4 openings: 22/22 dimensional fit, surfaced a tool gap in
  cut_opening (no adjacency check) + my build packed too tightly
- V5 HTTP: 10/10 (GET/PUT/PATCH/DELETE/HEAD, If-Match conflicts)
- V6 page: 14/14 (/scene/:id 81KB, /scenes 20KB, 404 fallback)
- V7 parentage: surfaced CROSS_CUTTING §2 site->building->level
  parentId=null (pre-existing in core's loadScene)
- V8 round-trip: 10/10 byte-equal, duplicate_level -> 110 nodes
- V9 spatial: 12/12 (find_nodes, measure, constraints resource)
- V10 visual: HTML fallback (Chrome extension disconnected during
  run); API layer intact

Follow-up tracked: `cut_opening` should check opening-adjacency on
the same wall (minimum gap) to catch tight packing during patch
construction. Currently returns success and relies on the UI to
visualise the overlap.

Live at http://localhost:3002/scene/a6e7919eacbe.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/mcp/test-reports/villa-azul/v9-spatial.md

@@ -0,0 +1,30 @@
+# Villa Azul - V9 Spatial + MCP Tool Validation Report
+
+- Scene id: `a6e7919eacbe`
+- Data dir: `/tmp/pascal-villa`
+- Transport: stdio (`/Users/adrian/Desktop/editor/.worktrees/mcp-server/packages/mcp/dist/bin/pascal-mcp.js`)
+- Generated: 2026-04-19T18:37:02.658Z
+- Duration: 94 ms
+
+## Results
+
+| # | Check | Status | Note |
+|---|---|:---:|---|
+| | load_scene | PASS | id=a6e7919eacbe name='Villa Azul' nodes=56 |
+| | 1. find_nodes(zone, levelId) | PASS | got 13 (expected 13) |
+| | 2. find_nodes(door) | PASS | got 10 (expected 10) |
+| | 3. find_nodes(window) | PASS | got 12 (expected 12) |
+| | 4. find_nodes(fence) | PASS | got 5 (expected 5) |
+| | 5. describe_node(living-dining) | PASS | desc='Zone "Living dining" with 4 vertices' |
+| | 6. measure(master,pool) | PASS | distance=19.602m (expected > 10m) |
+| | 7. check_collisions | PASS | collisions=0 (expected 0) |
+| | 8. get_node(pool-slab) | PASS | slab slab_azul_pool elevation=-2 (expected -2) |
+| | 9. find_nodes(zoneId=living-dining) | PASS | 26 nodes in polygon, types={"building":1,"wall":2,"zone":1,"door":10,"window":12} |
+| | 10. resource scene/current/summary | PASS | mime=text/markdown bytes=432 hasVillaAzul=false hasZone=13=true |
+| | 11. resource constraints/{levelId} | PASS | mime=application/json slabs=1 wallPolygons=12 poolInSlabs=true |
+
+## Summary
+
+- Pass: 12/12
+- Fail: 0
+- Overall: PASS