Kinds

kind tells Timon what a plugin is; slots tell it where that plugin inserts components. These must agree.

Kind	Surface
widget	At least one slot ending in .widget
page	page, with a declared route
overlay	Exact overlay slot, inside the app window
theme	Single theme slot
composer	Single chat.composer slot
layout	Single root slot
behavior	Effects or settings without a required visual kind
bundle	Installs contains; no browser half

A string is shorthand for a one-element list. A plugin can declare ['widget', 'overlay'] and register both surfaces in the same apply. They remain one identity. plugin-hello likewise registers navigation and a widget without becoming a bundle.

A bundle is exclusive: it cannot combine bundle with another kind or include a browser half. Only bundles may declare nonempty contains. Each child keeps its own identity and independent toggle.

A missing kind is inferred from recognised slots. A plugin with no recognised visual kind becomes behavior; there is no separate settings kind. Declare settings fields or exact settings slots instead.