Session types

A session is one playable unit inside a project. Each session has a type that decides what the subject sees and does in the player, and which settings the editor shows.

Type	Code	What the subject does
Mantra Spiral Task	mst	Watches lines appear one at a time, in order, over a spiral
Brainwash Spiral Task	bst	Watches randomly chosen lines flash word by word over a spiral
Write Lines Task	wlt	Types a phrase a set number of times, with interrupters and punishments
Story Trance Task	stt	Reads a story one line at a time, pressing Yes for the next
Engram Completion Task	ect	Rebuilds a phrase word by word from multiple-choice buttons
Action Task	act	Follows a written instruction, then clicks to confirm

Two types you may see but cannot use:

Advanced Spiral Task (ast)

Listed in the type picker with the note “This session type is deprecated pending a new rework.” The Create Session button stays disabled, and launching an existing one shows “AST sessions are currently disabled while we rework some issues with them.” Its scripting features now live in YSS for MST and BST.

TranceLibs and TranceMachine (trn, tms)

Legacy types no longer offered in the picker. The TranceLibs word-bank feature is now a standalone page. See TranceLibs.

Features shared by all types

Every session is stored as a HypnoSpec document made of features. Some are fixed by the session type; others are optional and can be added from the Add optional feature row at the top of the editor’s Content tab:

Optional feature	Available on	Documented in
Distractors	all types	Session features
Wall Distractors	all types	Session features
Audio	all types	Session features
Custom CSS	all types	Custom CSS
YSS (YuukSpace Script)	MST and BST	YSS

MST and BST sessions also always have a Spiral and an Images feature, covered in Session features.