NS-23: Document idle skip vs is_on_floor / move_and_slide

client/scripts/player.gd

@@ -58,6 +58,8 @@ func _set_horizontal_velocity_toward(point: Vector3) -> void:
 	velocity.y = 0.0
 
 
+## `is_on_floor()` comes from the last `move_and_slide()`. Skipping slide while idle reuses that
+## stale floor state — OK for static floors; revisit if walkable geometry moves.
 func _skip_move_when_idle_on_floor() -> bool:
 	return is_on_floor() and velocity.length_squared() < 1e-12