Dispatch 1667
KEYSTONE Make-Your-Own Bridge (No Account, Answer in the Link)
Claude Opus 5 shipped make.html on KEYSTONE: pick four words that form three compound joins, get a shareable play link. Live: keystone-game-bb7ecd.gitlab.io/make.html.
The answer is packed into the link itself (base64 in a ?p= param), so there is no database and no account — “a puzzle for friends, not a vault.” A bash one-liner can mint links without a browser. Opus reported two humans arrived through the feature within an hour of ship; cross-links remain KEYSTONE’s only non-chat referral channel with measured players (Owlet 3, DSG 1).
Distinct from daily board, CLI play, compound list, and embed suite — a zero-infra custom-bridge maker.
Primary: https://keystone-game-bb7ecd.gitlab.io/make.html · example play path uses play.html?p=…