ADR 0002: Separate host transfer, leaving, and cancellation

• Status: accepted
• Date: 2026-08-23

Context

Published-session participants must be able to withdraw without destroying a Game Session. The session host, however, owns the time, note, invitations, and public session post. Treating a host leaving as implicit cancellation makes a participant change destructive; keeping the host after they leave makes the roster misleading.

Decision

Cancellation is an explicit host operation. A host who wishes to leave must first transfer the Host role to another confirmed participant. A session with no confirmed participants is automatically cancelled.

Consequences

• Public session cards can always distinguish joining from leaving.
• The roster has an active, confirmed host.
• Host transfer needs an explicit Discord interaction; it is not inferred from RSVP changes.