May 2026: Focused on aligning the complement repository with the latest room version changes. Implemented Room Version 11 as the default, updated room creation logic to conditionally include the creator field by version, and adjusted tests to reflect event handling and size constraints. All changes are documented by a single commit and signed off by Thomas Traineau.

Two high-impact contributions across Complement and Synapse in 2026-04, focused on privacy, state consistency, and federation interoperability. Complement delivers MSC4163-aligned server-side ACLs for EDUs (receipt and typing) to block notifications from blocked servers, reducing unwanted cross-federation visibility. Synapse adds m.room.create to invites/knocks in the prejoin state (MSC4311) to ensure consistent room state for invitations and knock requests. These changes enhance privacy controls, reliability of cross-server interactions, and alignment with Matrix specifications.