Settings ▸ Remote gains a "Connect via" picker — LAN (default), Tailscale
(tailnet), or Relay (disabled, coming soon). On Tailnet, both devices run an
embedded tsnet node via TailscaleKit (tailscale/libtailscale) and sync frames
flow over the user's tailnet, so the phone can connect from anywhere the
tailnet reaches; Noise E2EE runs above the transport unchanged.
- NucleicTailnet (new target, macOS + iOS): TailnetNode wraps TailscaleKit's
node lifecycle (auth-key login, generation-fenced start/stop since up() is
un-cancellable) and drops to the framework's public C API for the data path
— tailscale_dial/listen/accept hand back full-duplex socketpair fds, wrapped
by FDFrameChannel (DispatchIO) into the shared FrameChannel seam. The Swift
wrapper's one-way connection actors can't carry a bidirectional stream.
- Host: TailnetListener adopts SyncListener; startSyncServer is single-flight
and honors toggle-off/picker changes at the commit point; pairing QRs carry
transport + tailnet IP/port hints (PairingPayload additive optional fields,
forward/backward compatible over CBOR).
- iPhone: pair/reconnect dial over whichever transport the pairing recorded;
Settings gains a Tailscale auth-key field (Keychain, committed on editing
end); connectivity chip shows "Connected · Tailnet".
- TailscaleKit has no SwiftPM distribution: scripts/build-tailscalekit.sh
builds a pinned libtailscale commit into an untracked local xcframework;
Package.swift links it only when present (everything builds without it, the
picker then reports Tailscale support as not built in), and the script
clears SwiftPM's content-keyed manifest cache so the toggle is picked up.
- iOS floor 17.0 → 18.1 (TailscaleKit requires the iOS 18 Swift runtime);
package-app.sh embeds the framework in the .app like Sparkle.
703-test suite: no new failures (the 7 fake-claude/fake-grok staging issues
reproduce identically on an untouched checkout — pre-existing, tracked
separately). New coverage: FDFrameChannel over socketpairs, pairing-payload
version-skew both directions, transport-setting resolution.
Co-Authored-By: Claude Fable 5 <[email protected]>
abkslmandClaude Fable 5
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