voice-builder turns your brand voice into a specification a machine can be held to: reading ease, sentence rhythm, hype density, direct-address density. Then every downstream skill writes to those numbers instead of guessing.
For teams whose AI writes customer-facing copy. Replaces the "professional yet approachable" paragraph that every brand gets.
Guidance-only: there is no backend and no API key. Your agent reads the skill and does the work.
Install the closest of 15 starter voices (4 traits × 4 ICPs × 7 languages) and tune it, instead of re-deriving a generic voice on every single call.
You get measured numbers, not adjectives. Downstream drafts are checked against them, so "off-brand" becomes a measurement rather than an opinion.
Selling biocides or CLP-classified products? A playful voice is refused outright and every claim is linted against BPR Article 72.
This is the real Di-Atomic voice profile, produced by this skill. Left: what a describe-the-tone prompt returns. Right: what voice-builder writes.
"Professional yet approachable. Clear, confident and customer-focused. Speaks with authority while remaining friendly and accessible."
voice-builder is a foundation skill. It writes one file, and every content skill downstream reads it.
A real trace on a real client, ONYX Radiance. The classifier was confident and wrong, the test caught it, and the fix went into the skill.
Writes landing, pricing and email copy against the numbers voice-builder set.
Adapts the same voice to each platform without drifting into generic social tone.
Keeps cold sequences sounding like you, not like a template.
Takes the voice into page sections so the design and the words agree.
Install voice-builder, spend five minutes tuning a starter voice, and give every downstream skill a target it can actually hit. Free, tier beta, on the OPVS marketplace.