Shoot-on-sight threats
Skinwalker is the clearest example. Once it reveals itself, the priority is removing the threat before you go back to normal treatment flow.
Monster Guide
Use this page when you want the whole monster roster in one place and the shortest rule for each kind of threat. The clean split is not by how scary the monster looks. It is by whether the answer is a weapon, an item, a route change, or a special room mechanic.
Skinwalker is the clearest example. Once it reveals itself, the priority is removing the threat before you go back to normal treatment flow.
Head Banger, Bed Monster, Surgery Tendril, and similar threats punish the wrong combat reflex and instead want Coffee, Maple Syrup, or a dedicated mechanic.
Stalker, Hiders, Camera Figure, and Mass of Eyes are more about movement, line of sight, item safety, and keeping your sanity intact.
Open this when failed admits are turning into the most dangerous roaming threat on the map.
Open this when one hallway monster is costing more sanity than the rest of the roster.
Open this when the threat is really a timed patient save instead of a combat decision.
Open this when the monster problem is actually a surgery mechanic with one very expensive wrong reflex.