docs: design.html v0.8 target rewrite — narrow mesh, uniques index, convection, registry
Full rewrite as the v0.8 target-design doc (7 rounds of design rulings):
- 20-peer mesh + temp referral slots; preferred peers eliminated
- N1-N4 uniques knowledge (two-pool announce: forwardable N0-N2 + terminal N3)
- Anchor convection (stochastic per-disconnect, adaptive weights, entry/top-up classes)
- Pool-carried anchor addresses; known_anchors demoted to bootstrap cache
- Discovery & First Contact: registrations-here post + HPKE greeting comments
- Comment TTL, 2-5 post concealment, traffic-uniformity adversary model
- Three-badge status system (Implemented/Rework/Planned), code-verified
- Roadmap: ID-class bug fixes first, registry tester-critical at #2, ALPN -> itsgoin/4
- Zero-users ruling: clean protocol break, no wire compat with <=v0.7.x
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LGiPD2cF75mnvneSCjdDC5
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