Chop/mine designation gate + reachability gates on Doctor & Eat

Player reported pawns ignoring chop designations. Root cause:
ChopProvider/MineProvider iterated World.trees/World.rocks
unconditionally — paint set a null sentinel and never touched the entity,
so designation was cosmetic only. Pawns auto-chopped nearest unfelled tree.

* Added chop_designated: bool to Tree, mine_designated: bool to Rock and
  BigRock (footprint-aware: paint on any of the 4 footprint cells flags
  the boulder). Save/load round-trips the flag.

* world.gd._on_designation_added 'chop'/'mine' cases now find the entity
  at the painted tile and flip the flag. _on_designation_cleared inverts.

* Boot seed auto-designates SAMPLE_TREES / SAMPLE_ROCKS / SAMPLE_BIG_ROCKS
  so the cabin demo still produces wood + stone end-to-end without
  requiring the player to paint first.

Also from the same audit (researcher mapped all 11 WorkProviders):

* DoctorProvider + EatProvider now pre-check reachability with
  pathfinder.find_path before issuing a job, mirroring HaulingProvider's
  pattern. Previously they handed out doomed walks that JobRunner had to
  cancel, busy-spinning at 20 Hz.

Verified end-to-end via MCP runtime: undesignated tree/rock returns null
from provider; paint flips the flag and provider returns a chop/mine job;
un-paint clears the flag; BigRock footprint paint works on any of the 4
cells.

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

scenes/ai/chop_provider.gd

@@ -34,6 +34,10 @@ func find_best_for(pawn) -> Job:
 	for tree in World.trees:
 		if not tree.is_choppable():
 			continue
+		# Gate on player designation — pawns don't auto-chop undesignated trees.
+		# Boot seed in world.gd auto-designates SAMPLE_TREES so the demo still runs.
+		if not tree.chop_designated:
+			continue
 		if Job.is_target_taken_by_other(tree, pawn):
 			continue
 		var d: int = abs(tree.tile.x - pawn.tile.x) + abs(tree.tile.y - pawn.tile.y)

scenes/ai/doctor_provider.gd

@@ -65,6 +65,10 @@ func find_best_for(pawn) -> Job:
 			continue
 		if Job.is_target_taken_by_other(p, pawn):
 			continue
+		# Reachability — same pattern as HaulingProvider. Skip patients we
+		# can't path to instead of issuing a doomed walk that JobRunner cancels.
+		if pawn.tile != p.tile and World.pathfinder.find_path(pawn.tile, p.tile).is_empty():
+			continue
 		var d: int = abs(p.tile.x - pawn.tile.x) + abs(p.tile.y - pawn.tile.y)
 		if d < best_dist:
 			best_dist = d

scenes/ai/eat_provider.gd

@@ -57,6 +57,10 @@ func find_best_for(pawn) -> Job:
 		var fp: int = _food_priority(it.item_type)
 		if fp < 0:
 			continue
+		# Reachability — same pattern as HaulingProvider. Skip food we can't
+		# path to instead of returning a doomed walk job.
+		if pawn.tile != it.tile and World.pathfinder.find_path(pawn.tile, it.tile).is_empty():
+			continue
 		var d: int = abs(it.tile.x - pawn.tile.x) + abs(it.tile.y - pawn.tile.y)
 		# Higher food-priority tier beats distance; within same tier nearest wins.
 		if fp > best_priority or (fp == best_priority and d < best_dist):

scenes/ai/mine_provider.gd

@@ -37,6 +37,10 @@ func find_best_for(pawn) -> Job:
 	for rock in World.rocks:
 		if not rock.is_mineable():
 			continue
+		# Gate on player designation — pawns don't auto-mine undesignated rocks.
+		# Boot seed in world.gd auto-designates SAMPLE_ROCKS so the demo still runs.
+		if not rock.mine_designated:
+			continue
 		if Job.is_target_taken_by_other(rock, pawn):
 			continue
 		var d: int = abs(rock.tile.x - pawn.tile.x) + abs(rock.tile.y - pawn.tile.y)

scenes/entities/big_rock.gd

@@ -50,6 +50,9 @@ var origin_tile: Vector2i = Vector2i.ZERO
 
 ## 0..MINE_TICKS. Advanced by on_mine_tick(); rock is mined when equal to MINE_TICKS.
 var mine_progress: int = 0
+## True once a player has painted a mine designation on any footprint tile.
+## MineProvider ignores undesignated boulders (Rimworld parity).
+var mine_designated: bool = false
 
 
 # ── lifecycle ─────────────────────────────────────────────────────────────────
@@ -165,6 +168,7 @@ func to_dict() -> Dictionary:
 		"origin_x": origin_tile.x,
 		"origin_y": origin_tile.y,
 		"mine_progress": mine_progress,
+		"mine_designated": mine_designated,
 	}
 
 
@@ -173,6 +177,7 @@ static func from_dict(d: Dictionary) -> Dictionary:
 		"origin_x": int(d.get("origin_x", 0)),
 		"origin_y": int(d.get("origin_y", 0)),
 		"mine_progress": int(d.get("mine_progress", 0)),
+		"mine_designated": bool(d.get("mine_designated", false)),
 	}
 
 

scenes/entities/rock.gd

@@ -23,6 +23,9 @@ const STONE_DROPS_ON_MINE: int = 1
 var tile: Vector2i = Vector2i.ZERO
 ## 0..MINE_TICKS. Advanced by on_mine_tick(); rock is mined when equal to MINE_TICKS.
 var mine_progress: int = 0
+## True once a player has painted a mine designation on this rock. MineProvider
+## ignores undesignated rocks (Rimworld parity — pawns don't auto-mine).
+var mine_designated: bool = false
 
 # Preloaded scene for spawned stone items.
 const ITEM_SCENE: PackedScene = preload("res://scenes/entities/item.tscn")
@@ -130,6 +133,7 @@ func to_dict() -> Dictionary:
 		"tile_x": tile.x,
 		"tile_y": tile.y,
 		"mine_progress": mine_progress,
+		"mine_designated": mine_designated,
 	}
 
 
@@ -138,6 +142,7 @@ static func from_dict(d: Dictionary) -> Dictionary:
 		"tile_x": int(d.get("tile_x", 0)),
 		"tile_y": int(d.get("tile_y", 0)),
 		"mine_progress": int(d.get("mine_progress", 0)),
+		"mine_designated": bool(d.get("mine_designated", false)),
 	}
 
 

scenes/entities/tree.gd

@@ -27,6 +27,9 @@ const STACK_SIZE_PER_DROP: int = 1
 var tile: Vector2i = Vector2i.ZERO
 ## 0..CHOP_TICKS. Advanced by on_chop_tick(); tree is felled when equal to CHOP_TICKS.
 var chop_progress: int = 0
+## True once a player has painted a chop designation on this tree. ChopProvider
+## ignores undesignated trees (Rimworld parity — pawns don't auto-chop).
+var chop_designated: bool = false
 
 # Preloaded scene for spawned wood items.
 const ITEM_SCENE: PackedScene = preload("res://scenes/entities/item.tscn")
@@ -125,6 +128,7 @@ func to_dict() -> Dictionary:
 		"tile_x": tile.x,
 		"tile_y": tile.y,
 		"chop_progress": chop_progress,
+		"chop_designated": chop_designated,
 	}
 
 
@@ -133,6 +137,7 @@ static func from_dict(d: Dictionary) -> Dictionary:
 		"tile_x": int(d.get("tile_x", 0)),
 		"tile_y": int(d.get("tile_y", 0)),
 		"chop_progress": int(d.get("chop_progress", 0)),
+		"chop_designated": bool(d.get("chop_designated", false)),
 	}
 
 

scenes/world/world.gd

@@ -409,18 +409,24 @@ func _spawn_sample_harvestables() -> void:
 	# Untyped vars — Godot's class-name cache for class_name'd classes is
 	# scan-time and intermittently lags behind file changes. Duck typing is
 	# safer here and the calls below are all spec'd on the entity types.
+	# Boot seed auto-designates so the production-chain demo runs end-to-end
+	# without requiring a player to paint chop/mine first. Real player-painted
+	# trees / rocks still gate on chop_designated / mine_designated (Rimworld parity).
 	for t_tile in SAMPLE_TREES:
 		var tree = TREE_SCENE.instantiate()
 		add_child(tree)
 		tree.setup(t_tile)
+		tree.chop_designated = true
 	for r_tile in SAMPLE_ROCKS:
 		var rock = ROCK_SCENE.instantiate()
 		add_child(rock)
 		rock.setup(r_tile)
+		rock.mine_designated = true
 	for br_origin in SAMPLE_BIG_ROCKS:
 		var big = BIG_ROCK_SCENE.instantiate()
 		add_child(big)
 		big.setup(br_origin)
+		big.mine_designated = true
 	Audit.log("world", "spawned %d trees + %d rocks + %d big rocks" % [
 		SAMPLE_TREES.size(), SAMPLE_ROCKS.size(), SAMPLE_BIG_ROCKS.size()
 	])
@@ -674,16 +680,30 @@ func _on_designation_added(cell: Vector2i, tool: StringName) -> void:
 			add_child(gs)
 			gs.setup(cell)
 			entity = gs
-		# Phase 17 — chop / mine: designation ghost only; providers auto-scan
-		# World.trees / World.rocks and will service the nearest entity.
-		# _build_sites_by_tile tracks the ghost so cancel works.
-		&"chop", &"mine":
-			# No entity to spawn — the ghost tile on the designation layer IS the
-			# marker. Register a sentinel (null body) so _build_sites_by_tile can
-			# clear the ghost on cancel without double-spawning.
+		# Chop / mine: flag the Tree / Rock entity at this tile so ChopProvider /
+		# MineProvider treat it as work. Designation ghost on the TileMap is the
+		# visual cue; _build_sites_by_tile holds a sentinel so cancel can clear.
+		&"chop":
+			for t in World.trees:
+				if t.tile == cell:
+					t.chop_designated = true
+					break
 			_build_sites_by_tile[cell] = null
-			Audit.log("world", "designation ghost '%s' at %s (no entity)" % [tool, cell])
-			return  # skip the entity/site registration below
+			Audit.log("world", "chop designation at %s" % cell)
+			return
+		&"mine":
+			for r in World.rocks:
+				# BigRock occupies a 2×2 footprint; flag if cell is any of them.
+				if r.has_method("footprint_tiles"):
+					if cell in r.footprint_tiles():
+						r.mine_designated = true
+						break
+				elif r.tile == cell:
+					r.mine_designated = true
+					break
+			_build_sites_by_tile[cell] = null
+			Audit.log("world", "mine designation at %s" % cell)
+			return
 		# Phase 17 — crate.
 		&"build_crate":
 			entity = CRATE_SCENE.instantiate()
@@ -743,8 +763,21 @@ func _on_designation_cleared(cell: Vector2i) -> void:
 		return
 	var entity = _build_sites_by_tile[cell]
 	_build_sites_by_tile.erase(cell)
-	# Phase 17 — chop/mine designations store null as their sentinel; nothing to free.
+	# Phase 17 — chop/mine designations store null as their sentinel; nothing to
+	# free, but clear the corresponding flag on any Tree / Rock at that tile.
 	if entity == null:
+		for t in World.trees:
+			if t.tile == cell:
+				t.chop_designated = false
+				break
+		for r in World.rocks:
+			if r.has_method("footprint_tiles"):
+				if cell in r.footprint_tiles():
+					r.mine_designated = false
+					break
+			elif r.tile == cell:
+				r.mine_designated = false
+				break
 		return
 	if not is_instance_valid(entity):
 		return