CLAUDE.md: phase moves from "local sandbox" to deployed; adds the
operations recipe (tar pipe to /var/www/duplicate-chess on Caddy CT 600).
DECISIONS.md: supersedes the "Deployment deferred" entry with the
chosen architecture — Caddy handle_path serving the static build under
the chess.sethpc.xyz origin, rather than a separate subdomain or a
Fastify static mount.
Local browser sandbox for "duplicate chess" — a four-player coupled-board
chess variant invented by Andrew Freiberg. Scaffold per CREATE_PROJECT.md
plus the approved design spec from this session's brainstorming.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>