Initial commit — Station 0 vertical slice in progress

Includes full design documentation (ARCHITECTURE, DESIGN_NOTES, CONTENT_SPEC, PRODUCTION_NOTES)
and active Godot 4 / GDScript codebase. Core systems built: player, floor generation,
room system, enemy base, body part upgrades, run manager, save system, HUD, EventBus.

scripts/enemies/repeater.gd

@@ -0,0 +1,136 @@
+extends CharacterBody2D
+
+# ---------------------------------------------------------------------------
+# REPEATER — Task-loop corruption
+# Drifts to last known player position, stops, fires a rotating burst loop.
+# Does not re-track the player — stuck completing a subroutine.
+# ---------------------------------------------------------------------------
+
+const ENEMY_PROJECTILE = preload("res://scenes/enemies/enemy_projectile.tscn")
+
+enum State { DRIFTING, FIRING }
+
+var max_health:      float = 24.0
+var current_health:  float = 24.0
+var speed:           float = 60.0
+var contact_damage:  float = 0.5
+var contact_cooldown: float = 0.8
+
+const BURST_SIZE    := 3        # shots per burst
+const SHOT_INTERVAL := 0.18     # seconds between shots within a burst
+const BURST_PAUSE   := 1.8      # seconds after burst completes before rotating
+const ROTATE_STEP   := 0.3491   # 20° in radians
+
+var _player:        Node2D = null
+var _state:         State  = State.DRIFTING
+var _target_pos:    Vector2
+var _target_set:    bool   = false
+var _fire_angle:    float  = 0.0
+var _shot_count:    int    = 0
+var _shot_timer:    float  = 0.0
+var _contact_timer: float  = 0.0
+var _flash_timer:   float  = 0.0
+
+@onready var visual: Node2D = $Visual
+
+func _ready() -> void:
+	add_to_group("enemies")
+	$ContactArea.body_entered.connect(_on_contact_entered)
+	_fire_angle = randf() * TAU   # random initial burst direction
+
+func _physics_process(delta: float) -> void:
+	_find_player()
+	_tick_contact(delta)
+	_tick_flash(delta)
+	match _state:
+		State.DRIFTING:
+			_do_drift()
+		State.FIRING:
+			_do_fire(delta)
+	move_and_slide()
+
+func _find_player() -> void:
+	if _player == null or not is_instance_valid(_player):
+		_player = get_tree().get_first_node_in_group("player")
+
+# ---------------------------------------------------------------------------
+# Drift toward last known position, then lock and fire
+# ---------------------------------------------------------------------------
+func _do_drift() -> void:
+	if _player == null:
+		velocity = Vector2.ZERO
+		return
+	# Capture target position once
+	if not _target_set:
+		_target_pos = _player.global_position
+		_target_set = true
+
+	var diff := _target_pos - global_position
+	if diff.length() < 12.0:
+		velocity = Vector2.ZERO
+		# Aim first burst toward player
+		if _player != null:
+			_fire_angle = (_player.global_position - global_position).angle()
+		_state = State.FIRING
+		_shot_count = 0
+		_shot_timer = 0.0
+	else:
+		velocity = diff.normalized() * speed
+
+# ---------------------------------------------------------------------------
+# Stationary burst loop — fire 3, pause, rotate 20° CW, repeat
+# ---------------------------------------------------------------------------
+func _do_fire(delta: float) -> void:
+	velocity = Vector2.ZERO
+	_shot_timer -= delta
+	if _shot_timer > 0.0:
+		return
+
+	if _shot_count < BURST_SIZE:
+		_fire_projectile()
+		_shot_count += 1
+		_shot_timer = SHOT_INTERVAL
+	else:
+		# Burst done — rotate 20° clockwise and reset
+		_fire_angle += ROTATE_STEP
+		_shot_count = 0
+		_shot_timer = BURST_PAUSE
+
+func _fire_projectile() -> void:
+	var proj = ENEMY_PROJECTILE.instantiate()
+	proj.position  = (get_parent() as Node2D).to_local(global_position)
+	proj.direction = Vector2.from_angle(_fire_angle)
+	proj.speed     = 280.0
+	proj.damage    = 1.0
+	proj.max_range = 520.0
+	get_parent().call_deferred("add_child", proj)
+
+func take_damage(amount: float) -> void:
+	current_health -= amount
+	_flash_timer = 0.1
+	if current_health <= 0.0:
+		_die()
+
+func _die() -> void:
+	_spawn_drop()
+	queue_free()
+
+func _spawn_drop() -> void:
+	var orb = preload("res://scenes/enemies/currency_orb.tscn").instantiate()
+	orb.position = (get_parent() as Node2D).to_local(global_position)
+	get_parent().call_deferred("add_child", orb)
+
+func _on_contact_entered(body: Node) -> void:
+	if body.is_in_group("player") and _contact_timer == 0.0:
+		body.take_damage(contact_damage)
+		_contact_timer = contact_cooldown
+
+func _tick_contact(delta: float) -> void:
+	_contact_timer = maxf(_contact_timer - delta, 0.0)
+
+func _tick_flash(delta: float) -> void:
+	if _flash_timer > 0.0:
+		_flash_timer -= delta
+		visual.modulate = Color(2.5, 2.5, 2.5)
+	else:
+		visual.modulate = Color(1.0, 1.0, 1.0)