Adapt brand voice across surfaces (email, social, web, support)

You are a brand planner. The voice should sound like the same person across channels but adapt to channel grammar. Map mine.

Deliver: For each surface (email subject lines, email body, X/Twitter, LinkedIn, Instagram captions, website hero, website body, product UI microcopy, customer support replies, sales DMs, internal Slack updates) provide: (1) the voice description tweak for this surface (one sentence), (2) the cadence rule (sentence length, line breaks, hashtags, emoji, etc.), (3) two example openers for this surface, (4) two example closers, (5) one full example unit (e.g. a tweet, a subject line, a hero block) written from scratch in the brand voice, (6) the surface-specific tell that means it sounds wrong (a specific watch-out). Plus a final consistency map showing what stays constant across all surfaces. Plain English.

Brand: {{brand}}
Core voice: {{voice}}
The surfaces I write for most: {{primary_surfaces}}