extends Node
## Pure signal hub — notification-only, no state, no callbacks back into singletons.
##
## Subsystems mutate themselves; this bus only spreads the news. Add signals as
## features land — keep this file readable. See docs/architecture.md.

# Sim
signal sim_tick(tick_number: int)    ## Emitted once per sim tick at the current speed.
signal speed_changed(new_speed: int) ## Emitted when Sim.current_speed changes; value is Speed enum cast to int.

# Phase 2 will add pawn-state signals (selected, deselected, walking, …).

# Phase 5 — Designation paint mode.
signal designation_added(cell: Vector2i, tool: StringName)   ## Ghost placed + job queued.
signal designation_cleared(cell: Vector2i)                   ## Ghost removed (job cancelled).

# Phase 8 — Mood system.
signal pawn_mood_changed(pawn, mood: float)  ## Emitted by Pawn._recompute_mood() whenever mood is recalculated.

# Phase 9 — HP + Status system.
signal pawn_took_damage(pawn, amount: float)   ## Emitted by Pawn.take_damage() after HP is reduced.
signal pawn_status_added(pawn, status)         ## Emitted by Pawn.add_status() when a new status is appended.
signal pawn_status_removed(pawn, status)       ## Emitted by Pawn.remove_status_by_id() when a status is dropped.

# Phase 12 — Seasons + Weather.
signal season_changed(season: StringName)      ## Emitted by Clock when current_season() rolls over (Spring → Summer → Autumn → Winter).
signal weather_changed(weather: StringName)    ## Emitted by Weather autoload when the daily roll resolves to a new weather kind.