--- cairn: change-tasks id: managesieve-support status: landed --- - [x] Add the optional Sieve account configuration and feature gate. - [x] Implement ManageSieve transport, authentication, literals, and status handling. - [x] Add Himalaya-style protocol commands and JSON schemas. - [x] Add configuration and command documentation. - [x] Add local parser and fake-server tests. - [x] Run formatting, feature-matrix builds, and the full test suite. - [x] Fold the change into current Cairn specs and write a landing log.