Swiftorrent

A download-only BitTorrent client for macOS, built in pure Swift and SwiftUI with no third-party dependencies.

Features

• Open .torrent files or paste magnet: links; pick files in an add dialog before anything downloads
• HTTP/UDP trackers, DHT, PEX, web seeds, MSE/PE encryption, and uTP for peers TCP can't reach
• Pause/resume, global speed cap, per-file progress, list restored across launches
• Never seeds or uploads: no listening port, stops when a download completes

Full list and protocol notes: docs/FEATURES.md.

Requirements

• macOS 26.0 or newer
• Latest stable Swift toolchain (Swift 6.3+; Xcode or Command Line Tools)

Build and run

Scripts/build.sh

Builds the Release binary with SwiftPM, wraps it in a .app, signs it ad hoc and installs it to ~/Applications/. The app name comes from App/Resources/Info.plist, so the script needs no edits per app. The log is in tmp/build.log. Unit tests: swift test -c release -Xswiftc -enable-testing --package-path Packages/Core (and Packages/Domain, Packages/Features).

More

• Project layout and module rules: docs/ARCHITECTURE.md
• Current status and next steps: SESSION_STATE.md
• How to work with Claude Code here: docs/WORKFLOW.md
• Unsigned-app workaround and live smoke test (Big Buck Bunny torrent and magnet): docs/DISTRIBUTION.md
• Download-speed benchmark: docs/BENCHMARK.md