Tailscale + LocalSend Peer Discovery

Discover peers via Tailscale mesh and exchange files via LocalSend protocol.

Architecture

┌─────────────────┐     ┌──────────────────┐     ┌─────────────────┐
│  Tailscale API  │────▶│  Peer Discovery  │────▶│  LocalSend API  │
│  (mesh network) │     │  (propagator)    │     │  (file xfer)    │
└─────────────────┘     └──────────────────┘     └─────────────────┘

Discovery Flow

1. Tailscale Status: tailscale status --json → get mesh peers
2. LocalSend Probe: UDP multicast 224.0.0.167:53317 → find localsend-enabled peers
3. Intersection: Peers on both networks get deterministic Gay.jl colors