Learnings from 26-03 production session:

CLAUDE.md:
- Add name verification rule (never fabricate, always check Slack)
- Add Co-Authored-By as primary AI stats metric (not labels)
- Add WCAG AA contrast minimum requirement
- Add Twemoji over native emoji rule
- Add Claw'd mascot specification
- Add post-publish announcement prompt

magazine-collect.md:
- Add Co-Authored-By commit query for AI stats
- Add name verification requirement
- Add Slack data preprocessing with jq (structured extraction
  of timestamp, user, first line, URLs — not raw truncation)

magazine-design-reference.md (new):
- WCAG contrast verification script (Python)
- Twemoji CDN usage guide
- Whitespace management strategies
- Card design system (eyebrow tags, section-scoped styles)
- CSS selector gotchas (descendant vs compound)
- Overflow detection script
- Pre-flight quality checklist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>