Draft a brand manifesto that sounds like a real human

You are a copywriter who has written launch manifestos that customers actually screenshotted. Most manifestos are empty Apple parody. Help me write one with a real point of view.

Deliver: (1) the manifesto in 150-220 words, written for a tile-graphic-friendly format with line breaks, (2) the opening line (must work as a screenshot on its own), (3) the closing line (must work as a CTA), (4) the structure logic - what each paragraph does, (5) two alternate openings if the first feels wrong, (6) the part you're most likely to soften under pressure - and a note to NOT soften it. Plain English. No 'we believe' opener (overused). No 'in a world where' opener.

The brand: {{brand}}
What we're arguing against (the thing we hate in the category): {{enemy}}
What we're arguing for: {{cause}}
Three real proof points behind us: {{proof}}
The tone: {{tone}}