Add check command to find missing services

src/compose_farm/cli.py

@@ -409,5 +409,35 @@ def sync(
             err_console.print(f"[yellow]![/] {exc}")
 
 
+@app.command()
+def check(
+    config: ConfigOption = None,
+) -> None:
+    """Check for compose directories not in config (and vice versa)."""
+    cfg = load_config(config)
+    configured = set(cfg.services.keys())
+    on_disk = cfg.discover_compose_dirs()
+
+    missing_from_config = sorted(on_disk - configured)
+    missing_from_disk = sorted(configured - on_disk)
+
+    if missing_from_config:
+        console.print(f"\n[yellow]Not in config[/] ({len(missing_from_config)}):")
+        for name in missing_from_config:
+            console.print(f"  [yellow]+[/] [cyan]{name}[/]")
+
+    if missing_from_disk:
+        console.print(f"\n[red]No compose file found[/] ({len(missing_from_disk)}):")
+        for name in missing_from_disk:
+            console.print(f"  [red]-[/] [cyan]{name}[/]")
+
+    if not missing_from_config and not missing_from_disk:
+        console.print("[green]✓[/] All compose directories are in config.")
+    elif missing_from_config:
+        console.print(f"\n[dim]To add missing services, append to {cfg.config_path}:[/]")
+        for name in missing_from_config:
+            console.print(f"[dim]  {name}: docker-debian[/]")
+
+
 if __name__ == "__main__":
     app()

src/compose_farm/config.py

@@ -65,6 +65,25 @@ class Config(BaseModel):
         # Default to compose.yaml if none exist (will error later)
         return service_dir / "compose.yaml"
 
+    def discover_compose_dirs(self) -> set[str]:
+        """Find all directories in compose_dir that contain a compose file."""
+        compose_filenames = {
+            "compose.yaml",
+            "compose.yml",
+            "docker-compose.yml",
+            "docker-compose.yaml",
+        }
+        found: set[str] = set()
+        if not self.compose_dir.exists():
+            return found
+        for subdir in self.compose_dir.iterdir():
+            if subdir.is_dir():
+                for filename in compose_filenames:
+                    if (subdir / filename).exists():
+                        found.add(subdir.name)
+                        break
+        return found
+
 
 def _parse_hosts(raw_hosts: dict[str, str | dict[str, str | int]]) -> dict[str, Host]:
     """Parse hosts from config, handling both simple and full forms."""