Published October 27 UTC on GitHub and the signed pilot feed. Publication and download do not mean every host has installed it; check Live Lobbies for current room versions.

• Preferred difficulty is kept separately by ruleset. Catch no longer shares Standard's preference; Standard, Taiko, Mania 4K and Mania 7K retain their separate scopes. Older mixed Standard/Catch records remain intact and are not guessed or copied into Catch.

• Scheduled empty-room recreation waits while a maintenance drain is pending. A shared admission fence prevents an automatic refresh from replacing a room while an update is establishing its drain.
• A proven controller failure after the affected rooms have closed can be retried by the staged update timer. Unknown ownership, partial transactions and unproven failures remain held for review.
• Existing configurations, room intent, OAuth authorization, enrollment, catalogs, ratings and statistics are preserved. The preference database schema remains compatible with supported hosts on different versions.

The signed feed offers this controller update to supported v7.3.3 and v7.3.4 installations. Rooms drain independently at safe empty boundaries; the controller update waits for all required rooms and bookings to clear. Deliberately stopped slots remain stopped. A host with an uncertain operation retains its state for review.

The exact runtime was tested with full catalogs on a separate donor using synthetic providers and credentials. The tests covered active booking and occupied-room protection, a configuration edit while waiting, helper interruption and retry, an empty sibling draining, an injected controller failure followed by guarded automatic recovery, preserved settings and data, and recovery-helper pin refresh. Focused and broader regression suites passed.

One donor test observer rejected its own receipt because it used the wrong field name; an independent supplemental check verified the recorded worker identity, empty/idle pre-close state, completed native proof and post-upgrade preservation. The observer did not retain its original in-memory leave-dispatch timestamp. No actual osu! room was used for donor testing. Runtime SHA-256: 644f2cba96e720c06343b54fd7feb82ad2924e63d02c69260d8cfca5b32925f2.