docs: mark Jajce scaffold proof complete

docs/BUILD_IN_PUBLIC_PLAN.md

@@ -234,7 +234,7 @@ makes the world pleasant to inhabit and the people pleasant to watch.
 
 ## Implementation phases
 
-### Phase 0 — Preserve and capture the baseline
+### Phase 0 — Preserve and capture the baseline 🔶 automated baseline complete
 
 Before replacing anything:
 
@@ -252,6 +252,11 @@ This becomes both a regression reference and excellent before/after material.
 There is a reproducible baseline showing the existing flat prototype and its
 working behaviors.
 
+`tests/flat_map_baseline_test.gd` and
+`docs/baselines/FLAT_MAP_BASELINE.md` establish the executable behavior
+baseline. A visual before-clip and frame-time capture remain useful content work
+but do not block the architecture gate.
+
 ### Systems prerequisite — Migrate food and wood targets ✅ complete
 
 Implement and validate the first ResourceNodes on the current flat map before
@@ -276,7 +281,7 @@ to be resource sources.
 Food and wood work without their zones during normal play, resource conservation
 holds, and target failure does not leave a permanent reservation.
 
-### Phase 1 — Create the reusable world scaffold
+### Phase 1 — Create the reusable world scaffold ✅ complete
 
 Create `world/jajce/JajceWorld.tscn` with:
 
@@ -299,7 +304,11 @@ look-development scene.
 The same `JajceWorld` instance can open in the lookdev scene and can be instanced
 under a temporary runtime test without errors.
 
-### Phase 2 — Greybox the hero composition
+Implemented in `556d0fd` with dedicated Terrain3D seed data, reusable world and
+lookdev scenes, environment roots, stable-ID ResourceNodes, activity markers,
+and a headless scaffold test.
+
+### Phase 2 — Greybox the hero composition ✅ initial proof complete
 
 Sculpt by hand before attempting GIS/DEM import:
 
@@ -337,7 +346,12 @@ The final navigation bake still happens after terrain and props stabilize.
 One static frame contains the ridge landmark, roofs, river/waterfall, and
 village work area. A test agent can traverse the intended task loop.
 
-### Systems gate — Harden simulation authority
+The initial proof uses primitive ridge, fortress, terrace, house, mill, bridge,
+river, and waterfall silhouettes plus a temporary baked navigation loop. The
+Terrain3D seed remains flat; sculpt refinement and the final bake resume only
+after the architecture gate.
+
+### Systems gate — Harden simulation authority ⏭ next
 
 After the scaffold, greybox, and navigation spike prove the world shape, pause
 visual production and complete the mandatory architecture gate from the
@@ -567,21 +581,24 @@ The follow-up milestone is complete when:
 
 ## Immediate implementation order
 
-1. Capture the current flat-map baseline.
-2. Treat ResourceNode migration and player parity as complete.
-3. Create `JajceWorld.tscn` and dedicated Terrain3D data.
-4. Create `JajceLookdev.tscn` and its beauty camera.
-5. Greybox the ridge, river valley, terraces, and waterfall drop.
-6. Place ResourceNodes with stable IDs and only required activity markers.
-7. Block out the fortress, houses, mill, and bridge.
-8. Run the early navigation spike.
-9. Pass the mandatory architecture gate before beauty production.
-10. Establish terrain materials, lighting, water, mist, and foliage.
-11. Capture “Jajce Lookdev 01.”
-12. Instance `JajceWorld` into `main.tscn`.
-13. Reconnect activity markers, rebake navigation, and run regression scenarios.
-14. Add profession/readability presentation and the reason inspector.
-15. Capture “Simulation Garden 01.”
+Completed:
+
+1. Executable flat-map baseline.
+2. ResourceNode migration and player parity.
+3. `JajceWorld`, dedicated 512 m Terrain3D seed, and lookdev camera.
+4. Initial landmark greybox, stable-ID resources, activity markers, and
+   navigation spike.
+
+Next:
+
+1. Pass the mandatory architecture gate before beauty production.
+2. Sculpt the Terrain3D ridge, river valley, terraces, and waterfall drop.
+3. Establish terrain materials, lighting, water, mist, and foliage.
+4. Capture “Jajce Lookdev 01.”
+5. Instance `JajceWorld` into `main.tscn`.
+6. Reconnect activity markers, rebake navigation, and run regression scenarios.
+7. Add profession/readability presentation and the reason inspector.
+8. Capture “Simulation Garden 01.”
 
 Do not start with GIS data, a full city, a large asset pack, or more NPC
 mechanics. The next proof is a beautiful stage for the systems that already