- The first "Typed API" service interface for chat-server, UnauthUsernamesService, has been added to libsignal's app layer.
- The libsignal-net remote config option `chatRequestConnectionCheckTimeoutMillis` controls a new check: if a chat request hasn't been responded to in this amount of time, libsignal will check if the connection is using the preferred network interface, and close it early if not.
- Java: `CertificateValidator.validate(SenderCertificate, long)` is once again `open` for testing.
- backups: Validate quote body length
- MSRV has been increased to 1.85
