Progressive Disclosure

Progressive disclosure means capability loads in three tiers instead of all at once: always, on trigger, on demand. The permanent tier is a sliver, a name and a description, and it is all the model always sees. Full instructions load only when the description matches the task at hand. Referenced material loads only when the instructions point at it. The context window is shared by instructions, history, and capability metadata, so the permanent tier stays small.

The craft consequence: the description becomes the deciding artifact. As the only part the model always sees, it alone determines whether the capability ever fires, so it has to say what the thing does and when to reach for it. Structure knowledge as a small entry point plus references, and spend the writing effort on the trigger.