- distillation runs on opus (env-overridable) with a 4-minute budget
- highlights must name the surface and outcome; vague filler is banned
- tweets target 200-280 chars with concrete changes and varied structure
- betas get their own tester-facing draft carrying `fn update --channel beta`
- prerelease openers read as "Fusion 0.74 beta:" instead of "Fusion 0.74-beta.0"