Version of SWIFT from April 2026. Major changes since v2026.01: - Released the FLAMINGO model and parameter files used for the original runs in the suite. - Added a large range of ci tests and scripts now running on a new dedicated server. - Added the Balsara-Kim 2004 ISM example to test feedback on small scales. - Added GroupIDs to the sink particle outputs - Speed-ups to the star formation task - Speed-ups in the star ghost operations by releasing a lock earlier - Speed-ups in the gravity operations (especially over MPI) by dropping tasks unnecessarily constructed at distances beyond the FFT mesh. - Added tracers for the GEAR model - Added SF logger for the star formation from sink particles - Added many new variables and modules to the GEAR sink module - Split partition.c, scheduler.c, and long-range gravity into smaller files - Added an example for the GEAR stellar wind module - Minor formatting, code duplication removals, and documentation improvements.