• Breaking change (id) Split UserID.ParseAndValidate into ParseAndValidateRelaxed and ParseAndValidateStrict. Strict is the old behavior, but most users likely want the relaxed version, as there are real users whose user IDs aren't valid under the strict rules.
• (crypto) Added helper methods for generating and verifying with recovery keys.
• (bridgev2/matrix) Added config option to automatically generate a recovery key for the bridge bot and self-sign the bridge's device.
• (bridgev2/matrix) Added initial support for using appservice/MSC3202 mode for encryption with standard servers like Synapse.
• (bridgev2) Added optional support for implicit read receipts.
• (bridgev2) Added interface for deleting chats on remote network.
• (bridgev2) Added local enforcement of media duration and size limits.
• (bridgev2) Extended event duration logging to log any event taking too long.
• (bridgev2) Improved validation in group creation provisioning API.
• (event) Added event type constant for poll end events.
• (client) Added wrapper for searching user directory.
• (client) Improved support for managing MSC4140 delayed events.
• (crypto/helper) Changed default sync handling to not block on waiting for decryption keys. On initial sync, keys won't be requested at all by default.
• (crypto) Fixed olm unwedging not working (regressed in v0.25.1).
• (bridgev2) Fixed various bugs with migrating to split portals.
• (event) Fixed poll start events having incorrect null m.relates_to.
• (client) Fixed RespUserProfile losing standard fields when re-marshaling.
• (federation) Fixed various bugs in event auth.