Replaced 4 individual design docs with single master architecture doc.
Design content moved to bead descriptions (self-contained, no markdown refs).
Closed gt-cr0.
- Add docs/architecture.md: top-down Gas Town explanation
- Delete docs/{town,swarm-shutdown,polecat-beads-access,mayor-handoff}-design.md
- Update CLAUDE.md to point to architecture.md
- Update beads: gt-sd6, gt-f8v, gt-eu9, gt-gl2, gt-zx3, gt-e1y, gt-cjb, gt-082,
gt-g2d, gt-sye, gt-vci, gt-82y, gt-l3c, gt-u82 now self-contained
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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