sc-sync

# /sc-sync — Gitignored-file sync over Tailscale ## Why this exists A repo is checked out on two machines (say, a VPS and a laptop). `.gitignore` deliberately keeps some files out of git — local notes, generated docs, scratch config — so they never travel with `git push` / `git pull`. Plain SSH `scp`/`rsync` between the two kept failing (NAT, dynamic IP, firewall...); Tailscale is confirmed working on both ends. This skill wraps `rsync` over the Tailscale interface so those gitignored files can move in either direction without inventing a new transport. It deliberately does **not** try to guess which machine it's running on via `hostname` — that leaks a real, personally-identifying hostname into logs and breaks the moment either machine is renamed or reimaged. Instead the invoking side declares itself explicitly via `SYNC_ROLE`. ## Requirements - Both machines joined to the **same tailnet** (`tailscale status` shows both). - The repo is checked out at the **same absolute path** on both machines (the default `SYNC_REMOTE_PATH` assumes this — override it if the layout differs). - `rsync` installed on both machines. - **The non-invoking side needs inbound SSH reachable** over Tailscale — rsync tunnels through SSH by default. That means: - Linux/macOS: `sshd` running, reachable from the tailnet. - **Windows: OpenSSH Server is NOT on by default.** You must explicitly enable "OpenSSH Server" (Settings → Optional Features, or `Add-WindowsCapability -Online -Name...