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Alan Wizemann edited this page Aug 19, 2026 · 2 revisions

Herald

Herald is a native macOS mail client for HQBase — a fast, keyboard-friendly, three-pane reader and composer for self-hosters who run their own HQBase instance. Swift 6, SwiftUI, SwiftData, Sparkle updates, AGPL-3.0.

  • Download: the latest notarized build is on the Releases page; the app updates itself afterwards.
  • Source: this repository. project.yml is the source of truth; Herald.xcodeproj is generated.
  • Status: early but dogfooded daily against a real HQBase ≥ 1.1.0 instance — see the README for the current feature list and CHANGELOG.md for what shipped when.

Start here

If you want to… Read
Build and run Herald from source Getting Started
Understand how the pieces fit together Architecture Overview
Know how sign-in and token storage work Authentication and Accounts
See how mail is fetched and cached Sync and Storage
Learn how the HQBase API is called API Client and Network
Change the composer, drafts, or attachments Compose and Drafts
Touch notifications, the Dock badge, or search Notifications and Search
Add UI that matches the rest of the app UI and Design System
Write or run tests Testing and Quality
Cut a release Release and Updates

The three rules that shape every page

  1. The server is the system of record. The local SwiftData store is a rebuildable cache: no schema migrations, recovery is delete-and-resync. (Sync and Storage)
  2. Views never touch a @Model. Everything crosses from HeraldKit into the UI as frozen, Sendable value types. (Architecture Overview)
  3. Swift 6 strict concurrency, @MainActor by default. Background work lives in actors; anything that must be callable from anywhere is explicitly nonisolated.

Where the deeper record lives

This wiki is the readable guide. The authoritative design record — architecture notes, conventions, decisions, and every HQBase server-contract gotcha found along the way — lives in the repo's .memory/ folder, managed by Memophant. When a wiki page and a memory note disagree, the memory note wins and the wiki page needs fixing (see Wiki Maintenance).

Contributing

Herald is the client only. Server-side changes it needs go upstream to HQBase as small, separate pull requests (the origin story is HQBase/hqbase#11). Bug reports and PRs for the client are welcome on this repo's issue tracker.

Last updated: 2026-08-19 — rewritten as a real landing page

Herald is AGPL-3.0. This wiki lives in the repo's wiki/ folder and is managed by Memophant — see Wiki Maintenance.

Getting Started

Reference

Runbooks

Clone this wiki locally