feat(packages): ludic.session - a party's roster (slot 0 a port, the others as reported), the roles and who owns the world, the shared night, votes and a world-changing act asking the party; joins, leaves, roles, votes and the night as facts

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.session/roles.ludic

@@ -0,0 +1,46 @@
+# roles.ludic - who owns the world. Alone, this machine does; a host does and has company; a
+# guest owns only its own player. The transport says what this machine became.
+export function ses_role() -> int { return session__role }
+
+export function ses_set_role(r: int) -> void {
+  if r == session__role { return }
+  session__role = r
+  session__fact(SES_ROLE, -1, 0)
+}
+
+# this machine runs the world: the clock, the weather, the animals, the people
+export function ses_owns_world() -> bool { return session__role != SES_GUEST }
+
+# somebody else is in this world, so nothing this player opens may stop it
+export function ses_live() -> bool { return session__role != SES_SOLO }
+
+export function ses_hosting() -> bool { return session__role == SES_HOST }
+
+export function ses_guest() -> bool { return session__role == SES_GUEST }
+
+# whether this player lying down ends the night; alone, it always does
+export function ses_night_passes() -> bool { return ses_owns_world() and not ses_live() }
+
+# the party a host allows (2..PLY_MAX) and whether it takes new players
+export function ses_set_party(max: int, open: bool) -> void {
+  session__max = max
+  if session__max < 2 { session__max = 2 }
+  if session__max > PLY_MAX { session__max = PLY_MAX }
+  session__open = open
+}
+
+export function ses_set_open(open: bool) -> void { session__open = open }
+export function ses_max() -> int { return session__max }
+export function ses_open() -> bool { return session__open }
+
+# may one more join: open, and not full
+export function ses_room_for_one() -> bool { return session__open and ply_count() < session__max }
+
+# the session is over: everyone else gone, alone again, nothing asked and nobody asleep
+export function ses_reset() -> void {
+  ply_leave_all()
+  ses_set_role(SES_SOLO)
+  session__me_sleeping = false
+  session__vote_t = 0.0
+  session__vote_mine = -1
+}