App foundations
- SwiftMail — the IMAP and SMTP library at the heart of Kestrel's mail transport.
- SwiftSoup — HTML parsing and sanitization for safe message rendering.
- Sparkle — the secure software update framework for direct-download releases.
- llama.cpp — the inference engine behind the optional enhanced local model pack.
Website
- Astro — the framework powering this site.
Apple platform
Kestrel leans heavily on Apple's frameworks — SwiftUI, WebKit, Quick Look, Contacts, Foundation Models, and the Keychain and authentication APIs that make a native Mac app feel right.
Thank you
To the maintainers and platform teams behind these tools: thank you.