Ghostwrite in someone else's voice without losing your own judgment
Matching a voice and matching their judgment about what's worth saying are different skills.
- Use it for
- Ghostwriters, comms staff, and anyone writing as someone else regularly.
Voice-matching prompts usually stop at surface features — sentence length, favorite words, punctuation habits — which produces text that sounds superficially right and reads as hollow to anyone who actually knows the person, because voice isn't just style, it's judgment: what they'd bother saying at all, what they'd cut, what claims they'd hedge and which they'd state flatly. Matching the surface without the judgment is why ghostwritten content often feels almost-right in a way that's hard to name but easy to sense.
This prompt builds a real voice profile — including judgment patterns, not just style — before writing anything in that voice.
When not to use this
For a one-off, low-stakes piece where a generic professional voice is fine, this level of profiling is overkill. This is for ongoing ghostwriting where getting the voice authentically right actually matters — a founder's public writing, an executive's recurring posts.
Did this work?
Someone who knows the person well would believe they wrote it — both the phrasing AND the judgment about what's actually worth saying, not just surface tics like their favorite words.
Tested on claude-opus-5. Evidence status is draft; it moves to battle-tested only on recorded runs, never by hand.