From 9d5a046b4002c82d2f876defed6eb92ad1700c4d Mon Sep 17 00:00:00 2001
From: Stan Runge <stan@stanrunge.dev>
Date: Tue, 29 Sep 2026 02:58:48 +0000
Subject: [PATCH] fix: resume saved lobbies when host capacity is full

---
 src/lib/server/match/runtime.test.ts | 24 ++++++++++++++++++++++++
 src/lib/server/match/runtime.ts      |  3 ++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/lib/server/match/runtime.test.ts b/src/lib/server/match/runtime.test.ts
index 01ff3d5..dffeb35 100644
--- a/src/lib/server/match/runtime.test.ts
+++ b/src/lib/server/match/runtime.test.ts
@@ -190,6 +190,30 @@ describe('match runtime with the simulator', () => {
 		await runtime.stop();
 	});
 
+	test('the due loop resumes a saved room even when all host slots are occupied', async () => {
+		const sim = new SimBancho(seeded(2));
+		const saved = await sim.open('Already created');
+		const initial = record(
+			{ bestOf: 1, teamSize: 1, scoringType: 'score_v2' },
+			slots(4, 0),
+			1,
+			true
+		);
+		initial.osuLobbyId = saved.id;
+		initial.ircAccount = saved.accountId;
+		const h = harness(initial, sim);
+		h.deps.dueMatchIds = async () => ['match-1'];
+		vi.spyOn(sim, 'capacity').mockReturnValue({ ...sim.capacity(), free: 0 });
+		const make = vi.spyOn(sim, 'open');
+		const runtime = new MatchRuntime(h.deps);
+		await runtime.boot();
+		await vi.advanceTimersByTimeAsync(1);
+		expect(h.stored().procedure.phase).toBe('waiting');
+		expect(h.stored().osuLobbyId).toBe(saved.id);
+		expect(make).not.toHaveBeenCalled();
+		await runtime.stop();
+	});
+
 	test('a reload waits for an in-flight make and reuses its persisted room', async () => {
 		const sim = new SimBancho(seeded(2));
 		const h = harness(
diff --git a/src/lib/server/match/runtime.ts b/src/lib/server/match/runtime.ts
index ef36d56..bea36d4 100644
--- a/src/lib/server/match/runtime.ts
+++ b/src/lib/server/match/runtime.ts
@@ -1096,7 +1096,8 @@ export class MatchRuntime {
 		const ids = await this.deps.dueMatchIds().catch(() => []);
 		for (const id of ids) {
 			if (this.stopped) return;
-			if (this.deps.provider.capacity().free < 1) return;
+			// open() can reuse a saved room even when its host has no free slots.
+			// A new room checks capacity on this match's selected provider.
 			try {
 				await this.open(id);
 				this.openFailures.delete(id);