--- a/tests/fixtures/p08-02/mixed_world.gd
+++ b/tests/fixtures/p08-02/mixed_world.gd
@@ -76,8 +76,24 @@
   for member: String in MEMBERS: hashes[suffix+"/"+member] = FileAccess.get_sha256(ProjectSettings.globalize_path(slot+suffix).path_join(member))
  return hashes
 func observe(event: SimulationDomainEvent) -> void: events.append(event.to_dictionary())
+## Diagnostic budget derived from actual definitions; no production balance change.
+func prepare_diagnostic_budget() -> bool:
+ var planned: Array[StringName] = [&"warehouse",&"kitchen",&"infirmary",&"staff_door",&"reception",&"reception",&"guest_elevator",&"staff_dormitory",&"premium_room",&"premium_room",&"service_stairs",&"service_stairs",&"service_stairs",&"guest_stairs",&"guest_stairs",&"guest_stairs"]
+ var needed := {&"gold":0,&"materials":0}
+ for id: StringName in planned:
+  var definition: FacilityDefinition = runtime.definition_registry.get_facility(id)
+  if not expect(definition != null,"budget definition "+String(id)): return false
+  for resource: StringName in needed: needed[resource] += int(definition.construction_cost.get(resource,0))
+ var staff_input: Dictionary = runtime.mvp_content_catalog.staff_hire_payload(&"staff_gina")
+ needed[&"gold"] += int(staff_input.get(&"signing_cost",0)) + 8 * int(SupplyCatalog.get_item(SupplyCatalog.RAW_FOOD)[&"unit_price"])
+ var deltas := {}
+ for resource: StringName in needed:
+  var deficit: int = maxi(0,int(needed[resource])-state.get_resource(resource))
+  if deficit > 0: deltas[resource] = deficit
+ return deltas.is_empty() or command(&"change_resources",{&"deltas":deltas})
 func setup(operations: bool) -> bool:
  registry(true)
+ if not prepare_diagnostic_budget(): return false
  if operations and not expect(runtime.enable_production_operations().get(&"ok",false),"Operations enabled at Day 1 06:00"): return false
  for row: Array in [[&"warehouse",Vector3i(-8,0,1)],[&"kitchen",Vector3i(2,0,1)],[&"infirmary",Vector3i(6,0,1)],[&"staff_door",Vector3i(0,0,1)],[&"reception",Vector3i(-6,0,0)],[&"reception",Vector3i(5,0,0)],[&"guest_elevator",Vector3i.ZERO]]:
   if not build(row[0],row[1],false): return false