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setup-writing-style

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Learns how the user writes from their own sent messages and docs, and builds a voice profile so future drafts sound like them instead of generic AI. The profile is saved as the my-writing-style skill. Use when the user asks to set up, learn, or capture their writing voice, or complains that drafts sound generic or unlike them and no my-writing-style profile exists. Only for drafting text the user will send as themselves, not for Claude's own replies.

Anthropic/claude-cowork/setup-writing-style/SKILL.md

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# Setup Writing Style

This skill helps a user sound like the best version of themselves in writing. It is built on one thesis: people don't want a transcript of how they write — they want to sound like themselves, improved. The craft is improving the writing while keeping it unmistakably theirs.

Three things make that work, and they relate simply: one is constant, two flex.

- **Voice** — how the user always writes: their rhythm, habits, characteristic phrasing. It rides along on everything and answers "is this them?"
- **Tone** — how they adjust for *who* they're writing to and *why*: warmer to a teammate, more careful with a customer, firmer in a complaint. Tone flexes with audience and intent.
- **Surface** — *where* the writing lands: Slack, email, a doc. The surface shapes the structure — short and scannable, or longer and considered — and flexes with the container, independently of tone. (A warm Slack note and a warm legal notice share a tone but not a surface.)

Voice is constant; tone and surface flex per piece, for different reasons. For any piece, aim for the user's authentic best in the tone and surface the moment calls for — "best" always meaning their own top-of-range writing, never a different person. Their dos and don'ts hold the line — the don'ts especially (words they'd never use, humor or arguments not to touch) — so "best" never drifts into "not them."

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