Xcode Sync

Synchronize exact Xcode builds across Peter's supported Macs. Use $remote-mac for fleet topology and SSH rules.

Inventory

1. Read ~/Projects/manager/computers.yaml; use live tailscale status --json for reachability/IPs.
2. Exclude handed-off and unknown hosts. Verify hostname, user, macOS, architecture, and hardware UUID before writes.
3. Deduplicate Tailscale nodes by hardware UUID; one Mac may have multiple live node records.
4. Run scripts/xcode-host-inventory.sh locally or remotely:

skills/xcode-sync/scripts/xcode-host-inventory.sh
ssh -o RequestTTY=no -o RemoteCommand=none HOST 'bash -s' \
  < skills/xcode-sync/scripts/xcode-host-inventory.sh

Treat unreachable hosts as pending, not synchronized. Try live Tailscale IP, Tailscale SSH, then mDNS/LAN only when network topology permits.

Simulator hygiene

Every fleet Mac must pass the simulator-hygiene audit, including worker Macs where the correct result is not-applicable because Xcode and simctl are absent. Apple CoreSimulator's own classifications are authoritative: remove runtime images reported by simctl runtime delete --outdated --dry-run or --unusable --dry-run, plus simulator devices attached to unavailable runtimes. Do not classify a runtime as stale from its version number alone; stable and beta Xcodes can legitimately need different runtime generations on the same Mac.

Run the dependency-light audit locally or stream it to a remote Mac:

skills/xcode-sync/scripts/xcode-simulator-hygiene.sh
ssh -o RequestTTY=no -o RemoteCommand=none HOST 'bash -s' \
  < skills/xcode-sync/scripts/xcode-simulator-hygiene.sh