spork-create: bail if local clone already exists

Trying to add remotes to an existing clone gets the origin wrong.
Better to error out and let the user handle it.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mise-tasks/spork-create

@@ -354,28 +354,14 @@ def main(
     else:
         local_path = LOCAL_BASE / repo_name
         if local_path.exists():
-            console.print(f"[yellow]Local directory already exists:[/yellow] {local_path}")
+            console.print(
-            console.print("Setting up remotes on existing clone...")
+                f"[red]Error:[/red] Local directory already exists: [bold]{local_path}[/bold]"
-            # Add missing remotes
-            mirror_url = f"{FORGE_SSH}/{MIRROR_ORG}/{repo_name}.git"
-            subprocess.run(
-                ["git", "remote", "add", "mirror", mirror_url],
-                cwd=local_path,
-                capture_output=True,  # may already exist
             )
-            if upstream_url and upstream_url != "unknown":
+            console.print(
-                subprocess.run(
+                "Remove it first or use [dim]--no-clone[/dim] to skip local setup."
-                    ["git", "remote", "add", "upstream", upstream_url],
-                    cwd=local_path,
-                    capture_output=True,
             )
-            subprocess.run(
+            raise SystemExit(1)
-                ["git", "fetch", "--all"],
+
-                cwd=local_path,
-                check=True,
-                capture_output=True,
-            )
-        else:
         console.print(f"Cloning to {local_path}...")
         clone_url = f"{FORGE_SSH}/{OWNER}/{repo_name}.git"
         subprocess.run(