Phase 13: Rooms + Auto-roof + Beauty + Dirtiness + Cleaning

Three-agent fan-out — Opus pre-wrote Room class, World.rooms/room_at_tile/is_indoor,
4 EventBus signals before dispatch so the slices ran fully parallel.

DECISION: Big-room UX = bump auto-roof cap to 16, banner above. Cabin
(24 tiles) intentionally exceeds cap to exercise the warning path; a
5×5 test shed (9 interior tiles) was added to exercise the roof path.

Room detection (Agent A):
- scenes/world/room.gd — class_name Room, tiles/bounds/is_under_roof,
  contains_tile() bounds-then-list-checked, recompute_bounds()
- scenes/world/room_detector.gd — class_name RoomDetector, BFS 4-dir
  from floor/door tiles, walls/terrain as boundary, doors counted as
  room interior. Detects up to 4× cap; auto-roofs only ≤16.
- World.mark_wall_tile/mark_floor_tile/mark_door_tile hook BFS recompute
- Door._complete() now erases wall-layer stamp + registers door tile
- Designation.TOOL_NO_ROOF paint mode wired (UI button deferred Phase 17)
- EventBus.room_changed / room_too_large signals

Indoor/Shelter (Agent B):
- Pawn._is_sheltered() rerouted: World.is_indoor() first, floor-proxy fallback
- IndoorTintOverlay Node2D — _draw fills roofed-room tiles at α=0.10 warm
- Crop._on_sim_tick skips stage advance when World.is_indoor(tile)

Beauty + Dirtiness + Cleaning + Room thoughts (Agent C):
- BeautySystem sparse map, linear falloff radius=3, Quality multiplier
  (SHODDY 0.5 → LEGENDARY 2.5). Base: Bed +2, Workbench +1, Torch +3, Hearth +4
- DirtinessSystem 0-100, tier crossings (clean<25/dirty<60/filthy≥60)
  emit tile_dirtiness_changed. bump/bump_clean/bump_pawn_traffic API
- CleaningProvider priority=2, KIND_CLEAN toil, 2.5 dirt/tick for ~40 ticks
- Bed/Torch/Workbench _complete() now register with BeautySystem
- 7 room mood thoughts: clean_room (+2), dirty_room (-3), filthy_room (-6),
  beautiful_room (+4), ugly_room (-3), slept_in_room (+3 EVENT, wires Ph 17),
  ate_without_table (-3 EVENT, wires Ph 17)
- Pawn._sync_room_thoughts called from _process_thoughts after cold block,
  defensive against null rooms/systems

Integration recovery (Opus):
- Agent C's BeautySystem/DirtinessSystem/CleaningProvider/IndoorTintOverlay
  instantiation in world.gd never landed (only field declarations + entity
  hooks survived). Added preloads + runtime add_child + autoload bindings +
  CleaningProvider registration + furniture pre-seed in _ready
- Added _prestamp_test_shed_for_room_detector with _spawn_complete_wall/floor
  helpers so a 5×5 visible shed exercises the auto-roof path at boot

MCP runtime verified:
- Rooms: cabin Room#2 size=24 roofed=false (room_too_large fires),
  shed Room#3 size=9 roofed=true (auto-roof active)
- beauty_map size=50 around prebuilt furniture; bed at (47,24) beauty=4.0
- Bram teleported to (36, 25) in shed → indoor=true, sheltered=true,
  thoughts=[clean_room +2], mood=52.0
- Screenshot: shed walls + brown floor visible; cabin warmly torch-lit;
  Spring 1/12 indicator; Day 1 07:52

Delegation: 3× gdscript-refactor (Sonnet) agents in parallel;
integration recovery + MCP verify on Opus.

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

scenes/ai/cleaning_provider.gd

@@ -0,0 +1,65 @@
+class_name CleaningProvider extends WorkProvider
+## Phase 13 — WorkProvider for the Cleaning work category.
+##
+## Priority 2: fires when there is nothing more productive to do
+## (below hauling=3, above rest=0).
+##
+## make_job / find_best_for logic:
+##   Scan DirtinessSystem.dirt_map for tiles with dirt >= DIRTY_THRESHOLD.
+##   Pick the nearest to the pawn by Manhattan distance.
+##   Build a 2-toil job: walk_to(tile) → kind_clean(tile).
+##
+## There is no Cleaning skill yet (Phase 17+ skill matrix).  The clean toil
+## takes a flat CLEAN_TICKS sim ticks to reduce dirt from any level to 0.
+##
+## JobRunner._tick_clean reduces DirtinessSystem.dirt_at(tile) by
+## DIRT_REDUCTION_PER_TICK each sim tick until dirt <= 0.
+##
+## Audit.log fires on job start and on toil completion (via JobRunner).
+
+## Dirt level at or above which a tile is worth cleaning.
+const DIRTY_THRESHOLD: float = 25.0
+
+## Base number of sim ticks to clean a tile from any level to 0.
+## No skill modifier for now; Phase 17 wires skill × speed.
+const CLEAN_TICKS: int = 40
+
+
+func _init() -> void:
+	category = &"clean"
+	priority = 2
+
+
+# ── WorkProvider override ─────────────────────────────────────────────────────
+
+## Returns a cleaning Job for `pawn`, or null if no dirty tiles exist.
+## Picks the tile closest to `pawn` (Manhattan distance) with dirt >= DIRTY_THRESHOLD.
+func find_best_for(pawn) -> Job:
+	# Safety — dirtiness system may not be wired yet (Agent A rooms arrive slightly later).
+	if World.get("dirtiness_system") == null:
+		return null
+
+	var ds = World.dirtiness_system
+	if ds == null:
+		return null
+
+	var best_tile: Vector2i = Vector2i(-1, -1)
+	var best_dist: int = 999999
+
+	for tile in ds.dirt_map.keys():
+		var dirt_val: float = float(ds.dirt_map[tile])
+		if dirt_val < DIRTY_THRESHOLD:
+			continue
+		var d: int = abs(tile.x - pawn.tile.x) + abs(tile.y - pawn.tile.y)
+		if d < best_dist:
+			best_dist = d
+			best_tile = tile
+
+	if best_tile == Vector2i(-1, -1):
+		return null
+
+	var j := Job.new()
+	j.label = "Clean (%d,%d)" % [best_tile.x, best_tile.y]
+	j.toils.append(Toil.walk_to(best_tile))
+	j.toils.append(Toil.clean_at(best_tile))
+	return j