A native macOS SFTP file manager in the spirit of Cyberduck/FileZilla, built with SwiftUI and Citadel (Swift NIO SSH) — no Xcode project required, just Swift Package Manager.

This project is entirely vibe coded (initially made using Fable 5) and not a representation of my own work.

• Bookmarks sidebar — save servers (host, port, username, starting path), double-click to connect, optional custom emoji icon per bookmark. Stored in ~/Library/Application Support/CloudLink/bookmarks.json.
• Authentication — password or OpenSSH private key (Ed25519 and RSA, encrypted keys supported). Passwords and passphrases are kept in the macOS Keychain, never on disk.
• Remote browser — Finder-matching file icons (via NSWorkspace, so third-party document icons like PhpStorm's .php icon appear), sortable columns (name, size, modified, permissions), editable path bar, hidden-file toggle, folder-first ordering, double-click to open folders or download files.
• Transfers — chunked uploads/downloads with live progress bars and cancellation, capped at 3 concurrent transfers. Recursive folder download/upload. Drag files from Finder onto the file list to upload.
• File management — new folder, rename, recursive delete (with confirmation), copy remote path.
• Edit in external editor (⌘K) — opens the selected file via a local working copy; every save is detected and uploaded back automatically. Handles both in-place saves and atomic (rename-over) saves. The editor is configurable in Settings (⌘,): automatic (VS Code, then system default), the system default per file type, or any installed app.

swift build              # debug build
Scripts/package.sh       # release build → dist/CloudLink.app
open dist/CloudLink.app

The command-line toolchain has no XCTest, so verification is built into the binary. This checks the path/permission helpers locally, then connects to Rebex's public demo SFTP server and exercises auth, listing, download with progress, and error handling:

.build/release/CloudLink --smoke-test

Scripts/smoke-rw.sh additionally spins up a disposable sshd on 127.0.0.1:2222 and runs the read-write pass: private-key auth, chunked upload, byte-for-byte download round-trip, rename, and recursive delete, plus the file-watcher checks behind ⌘K editing.

Sources/CloudLink/
  main.swift             entry point (app vs --smoke-test)
  CloudLinkApp.swift     App scene, menu commands
  ContentView.swift      split view, sidebar, connect + password prompt flows
  BrowserView.swift      remote file table, toolbar, context menus
  TransfersView.swift    transfer queue panel
  BookmarkEditorView.swift
  SessionViewModel.swift @MainActor state: connection, listing, transfers,
                         edit sessions (⌘K save-and-upload loop)
  EditingSupport.swift   FileWatcher, external editor launcher, ⌘K command
  SettingsView.swift     editor preference pane (⌘,)
  SFTPConnection.swift   Citadel wrapper: connect/list/transfer/delete
  BookmarkStore.swift    JSON persistence
  KeychainStore.swift    Security.framework wrapper
  Models.swift           SiteBookmark, RemoteItem, TransferItem
Resources/               Info.plist, AppIcon.icns
Scripts/package.sh       release build + .app assembly + ad-hoc codesign

• Host keys are accepted on first use without a known_hosts check (hostKeyValidator: .acceptAnything()).
• One connection at a time (no tabs / dual-pane).
• Symlinked folders open fine, but symlinks are skipped during recursive folder downloads.