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How do you author library types that pass `isolatedDeclarations` for `oxc` / `tsdown` builds?

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01

Understand the problem

Checklist for library authors: explicit return types, no satisfies leaks, verbatimModuleSyntax re-exports, and tools (publint, attw, tsdown).

isolatedDeclarationspublishing
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

TS filecode + types<line class="

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04

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