Editing Unwritten: System Reference Document/Stunts and Resources (section)

===Creating a rules exception===

Finally, a stunt is a single exception for any other game rule that doesn’t precisely fit into the category of an action. There are all sorts of different little rules about the circumstances under which a skill can be used and what happens when you use them, for example. Stunts can break those, allowing your character to stretch the boundaries of the possible. Additionally, your stunt may simply be narrative with no specific system effects.

The only limit to this is that a stunt can’t change any of the basic rules for aspects in terms of invoking, compelling, and the fate point economy. Those always remain the same.

:'''Friendly Face.''' You immediately come across as a likeable person, no matter the situation. NPCs are favorably disposed to you when you first meet them until you give them a reason to feel otherwise. This works even if you do not share a language.

:'''Useful Little Things.''' Your pockets are full of useful little things. Whenever you need something, you have it, provided it’s not something too unusual or too large to fit in a pocket, belt pouch, or backpack. When you say you have something, the GM should be likely to agree.

:'''Carefully Concealed.''' When you use Stealth to create a Carefully Concealed (or similar) advantage on something, you can always actively oppose any overcome rolls to discover the item (also using the same skill), even if you’re not there. (Normally, if you weren’t there, the investigating character would roll against passive opposition, making it much easier to discover.)