Provenance: the maintainer reported 'after some time i get an empty page
back. I guess the game crashes or ends but that is unclear as the ui
disappears.' Reproduced by driving a real game to completion over HTTP:
move 5 accepted, then GET / -> Connection refused. The game ENDED
normally, 5 rounds and 30 commands, and its whole result -- coalitions,
scores, winners, hash -- went to the terminal. next_choice only accepts
connections inside a human decision point, so when play() returns the
listener dies and the post-ok reload is refused. A crash and a win
render identically: nothing. Same class as CB-WP-0016's silent drop.
Also carries the chaos rate change CB-EV-0015 owed to the next
declaration (d4 -> d8, second window of 12), which is what makes this
structurally M. Rolled at the old d4=3, no override, because a rate
changes when the decision lands and not retroactively.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
