ssh-config: add gen-config.py + homelab ssh-config CLI subcommand

bin/homelab

@@ -517,6 +517,19 @@ def cmd_ssh(args: argparse.Namespace) -> int:
     os.execvp(cmd[0], cmd)
 
 
+def cmd_ssh_config(args: argparse.Namespace) -> int:
+    """Generate SSH config from inventory.yaml."""
+    script = CONTEXT / "ssh" / "gen-config.py"
+    if not script.exists():
+        die(f"ssh-config generator not found: {script}")
+
+    cmd = [sys.executable or "python3", str(script)]
+    if args.install:
+        cmd.append("--install")
+
+    return subprocess.call(cmd)
+
+
 def cmd_pct(args: argparse.Namespace) -> int:
     lxc = args.lxc
     inv = inventory()
@@ -1459,6 +1472,12 @@ def main() -> int:
     sp.add_argument("command", nargs=argparse.REMAINDER)
     sp.set_defaults(func=cmd_ssh)
 
+    sp = sub.add_parser("ssh-config",
+                        help="generate ~/.ssh/config.d/homelab from inventory.yaml")
+    sp.add_argument("--install", "-i", action="store_true",
+                    help=f"write to ~/.ssh/config.d/homelab and wire Include into main config")
+    sp.set_defaults(func=cmd_ssh_config)
+
     sp = sub.add_parser("pct", help="proxy pct commands via ssh to hubris")
     sp.add_argument("lxc")
     sp.add_argument("action")