The keeper can bring back a seat a browser lost: a new token on the ledger, the old one refused and any phrase it minted voided, and a link that carries it in the fragment, minted by waving-hands-reseat.sh through a /keeper door Caddy does not proxy; the join page keeps a linked seat only once the server takes it and never over a seat that still opens, a watcher at a duel in play is told both ways back, the hall asks before forgetting a duel in play, and the server's rooms have tests of their own

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MbtUPJ24P6vc6tE1x6RS3m

src/lib/components/Hall.svelte

@@ -167,7 +167,14 @@
 		if (c) void goto(`/join/${c}`);
 	}
 
+	/** A duel in play asks before it is forgotten: this browser may be the only thing that holds the seat. */
+	let forgetting = $state<string | null>(null);
 	function forget(roomId: string) {
+		if (!games[roomId]?.state?.over && forgetting !== roomId) {
+			forgetting = roomId;
+			return;
+		}
+		forgetting = null;
 		forgetSeat(roomId);
 		seats = allSeats();
 	}
@@ -279,12 +286,16 @@
 				</div>
 			{/if}
 			{#each seats as held (held.roomId)}
-				<div class="ledger-row" class:your-move={yourMove(held)}>
+				<div class="ledger-row" class:your-move={yourMove(held)} class:asking={forgetting === held.roomId}>
 					<a class="ledger-resume" href={`/join/${held.roomId}`}>
 						<span class="ledger-code">{held.roomId}</span>
 						<span class="ledger-info">{status(held)}{#if unread(held) > 0} · <span class="talk-new">{unread(held)} new {unread(held) === 1 ? 'line' : 'lines'} of talk</span>{/if}</span>
 					</a>
-					<button type="button" class="ledger-forget" title="forget this duel" onclick={() => forget(held.roomId)}>×</button>
+					{#if forgetting === held.roomId}
+						<span class="forget-ask">This browser may be all that holds your seat. <button type="button" class="quiet" onclick={() => forget(held.roomId)}>Forget it</button> <button type="button" class="quiet" onclick={() => (forgetting = null)}>Keep it</button></span>
+					{:else}
+						<button type="button" class="ledger-forget" title="forget this duel" onclick={() => forget(held.roomId)}>×</button>
+					{/if}
 				</div>
 			{/each}
 			{#if reports.length}
@@ -675,6 +686,16 @@
 		color: var(--ember);
 	}
 
+	/* The question takes a line of its own under the duel on a narrow screen. */
+	.ledger-row.asking {
+		flex-wrap: wrap;
+	}
+
+	.forget-ask {
+		font-size: 0.85em;
+		padding: 0 0.2rem 0.3rem;
+	}
+
 	.ledger-forget {
 		background: none;
 		border: 0;