Ran 1 shell command 

● Applied and verified — the key still authenticates, now with SSH forwarding disabled (can't be used as a network pivot if the key ever leaks).
  Backup saved.

  Here's the honest picture and the two decisions that are genuinely yours to make (this is where I don't want to guess and risk locking you out):

  What's already true (good): access = one key (this Hetzner box), over the tunnel only, key-only, no root, firewall + stealth on. So "only this
  Hetzner machine reaches it" is done.

  One reachability note: FileVault is on, so after a reboot/power-loss the Mac won't come back online until someone enters the password at the console
  (PiKVM). That's a security-vs-availability tradeoff you should know about.

←  ☐ Lockdown level  ☐ Break-glass  ✔ Submit  →

Access is already limited to this Hetzner key over the tunnel only. How much further should I restrict what that key can DO on the Mac (in case 
Hetzner/the key is ever compromised)?

❯ 1. Guardrail: block destructive
     A forced-command wrapper that BLOCKS clearly-destructive commands (rm -rf, disk erase, shutdown, user/passwd changes) but allows all 
     reactor-build + dev/build ops. Low friction, kills the worst case if the key leaks. Recommended.
  2. Full build-only whitelist
     The key can ONLY run reactor-build's defined operations; ALL arbitrary shell is blocked. Max security, but needs a reactor-build redesign and 
     future ad-hoc admin must go through PiKVM.
  3. Keep current (no command gate)
     Hetzner-key-only + tunnel-only + no-forwarding + firewall is enough; keep full shell for the trusted reactors.
  4. Type something.

  5. Chat about this

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