Zephyr — for Zulip

Zephyr is a truly native Apple-platform client for Zulip — macOS first, with iOS/iPadOS builds from the same target: a calm two-pane window in the spirit of Apple Messages, with the web app’s sidebar concepts (channels, folders, topics, views) rendered natively. The name honors Zulip’s ancestry in MIT’s Zephyr messaging system — and a zephyr is a soft, fast breeze, which is the feel the app aims for. Zephyr is an independent project, not affiliated with the Zulip organization.

Status: feature-complete through M4 (minus scheduled messages, deferred deliberately). Everything in M2’s messaging core plus: notifications with inline reply (DMs + mentions, while running — Zulip has no desktop push), dock badge and send sounds (configurable in Settings ⌘,), multi-account with switching, a channel browser with subscribe/unsubscribe and muting, warm launch from a cached snapshot (“stale → live”), topic moves with propagation, read receipts, and an edit-history viewer. Offline-first: warm launch from the cached snapshot, a per-account SQLite message store (GRDB) retains full history for offline transcripts, offline scrollback, and offline…