Sekiya Academy
Open a mechanism. Trace it until it is plain.
A small set of visual technical rooms. Each one starts with a working mechanism, lets you change its state, then names the boundary of what the room does not prove.
Open rooms
A path through the machine.
Start with command execution, then the state pattern that keeps a simulation coherent.
Boundary
Not every note is a room.
The Academy only links material that has an explanation, a working interaction, and a stated limit.
Implementation notes that are not yet explainable as a room stay unpublished here. That keeps the index honest: an item appears when someone can enter it, test the central mechanism, and see where the explanation stops.
The rule
If the central idea cannot be explained clearly, we probably do not understand it yet.