Brand Voice Writer

Asking an AI to "write in our tone" usually gets you generic marketing copy. It doesn't know your brand never uses exclamation marks, always says "you", keeps sentences short and calls customers something specific.

This skill fixes that in two steps. First, your AI reads 3 to 10 samples of your writing and builds a voice-guide.md: the voice in one line, six tone sliders each backed by a quote, words to use and avoid with replacements, sentence and formatting habits, do/don't pairs, and the questions your samples couldn't answer. A measured profile records the numbers behind the voice.

Second, it writes or rewrites content in that voice, starting from a fact list so nothing gets invented. It scores each draft out of 100: 50 points measured by a script, 50 from a written rubric covering tone, vocabulary, formatting and whether the job got done. It revises until the draft scores 85 or more.

The Node.js helper (no dependencies) measures sentence length and spread, Flesch-Kincaid grade, contraction rate, exclamations, questions, I/we/you use, passive voice, distinctive words and every avoid-list hit with its line number. It compares a draft with the range your samples cover and never changes your files.

The example uses a fictional brand: an off-voice launch post scores 15, the rewrite 98. English only. The measurements are heuristics, and half the score is judgment.