A footnote belongs to the idea in which you write it, just as citations do. So that rookery can track them correctly, you need to use the footnote function imported from rookery in ideas, rather than the Typst native function. (Using Typst’s own #footnote will cause a compilation error.)
#import "@rookery/core:0.1.0": idea, footnote
#idea("etal")[
A claim#footnote[The evidence.] worth qualifying.
]Footnote numbering is idea-local. This means that there may be two footnotes labeled 1 on the same page, if two ideas with footnotes are hatched in that context.1
Footnote listings occur at the end of each idea.2 On a standalone page, footnotes appear before the context and backlinks listings.
A footnote written outside an idea’s context proxies the native Typst function so that it behaves normally.
What you write inside a footnote belongs to the idea as well, and not to the footnote. A citation in a footnote is claimed by the surrounding idea and listed in its References,3 and a window or an @idea: reference in a footnote registers its backlink exactly as it would in the idea’s own prose.
limit which truncates the content.