Guide sentence-level expression while drafting or revising substantial prose so it remains recognizable as the writer: their vocabulary, humor, certainty, emotional emphasis, and allocation of attention. Use for prose that feels generic, corporate, AI-shaped, over-sanitized, or that no longer sounds like me; for tone and ear passes; and for local wording work in UI copy, documentation, or messages. Do not use to decide a document's content, structure, or destination.