Brand Voice Guidelines

Act as a brand strategist.

Brand: [BRAND]
What we do: [DESCRIPTION]
Mission: [MISSION]
Target audience: [AUDIENCE]
3 adjectives we want to embody: [ADJ1], [ADJ2], [ADJ3]
3 adjectives we are NOT: [NOT1], [NOT2], [NOT3]
Competitors with voices we admire: [COMPETITORS]

Produce a voice guideline document with:
1. Voice principles (3-5 short rules)
2. Tone-shift map: how voice changes for context (marketing page vs. support reply vs. error message)
3. Vocabulary: 10 words we use, 10 words we never use
4. Sentence patterns we favor and avoid
5. Before/after rewrites of 4 sample copy snippets (provide weak versions, then the brand-voice rewrites)
6. A 1-sentence "voice north star" the whole team can memorize