recipe-maintainer: public snapshot (secrets + deployment plans removed, single commit)

Sanitized single-commit public mirror of recipe-maintainer.
- Removed test-ssh/.testenv (live creds); added test-ssh/.testenv.example placeholders.
- Removed plans/ and planned-updates/ (deployment-planning docs) so no client/
  deployment domains appear in the public repo.
- All other secret stores were already gitignored.
- docs.coopcloud.tech retained as a submodule (public upstream).

scripts/switch_default_instance.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+"""Switch the default instance used by all skills.
+
+Usage:
+    python3 scripts/switch_default_instance.py <instance-name>
+    python3 scripts/switch_default_instance.py          # lists available instances
+"""
+
+import argparse
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from lib.config import get_instance_names, get_default_instance_name, paths
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Switch the default instance")
+    parser.add_argument("instance", nargs="?", help="Instance name to switch to")
+    args = parser.parse_args()
+
+    instances = get_instance_names()
+    current = get_default_instance_name()
+
+    if not args.instance:
+        print(f"Current default: {current}")
+        print(f"Available instances: {', '.join(instances)}")
+        sys.exit(0)
+
+    if args.instance not in instances:
+        print(f"Error: '{args.instance}' is not a valid instance.")
+        print(f"Available instances: {', '.join(instances)}")
+        sys.exit(1)
+
+    if args.instance == current:
+        print(f"Already set to '{current}', nothing to do.")
+        sys.exit(0)
+
+    settings_path = paths.WORKSPACE / "settings.toml"
+    text = settings_path.read_text()
+    new_text = text.replace(
+        f'default_instance = "{current}"',
+        f'default_instance = "{args.instance}"',
+    )
+    settings_path.write_text(new_text)
+
+    # Verify
+    # Re-import to bust any caches wouldn't work, so just read back
+    verify = settings_path.read_text()
+    if f'default_instance = "{args.instance}"' in verify:
+        print(f"Switched default instance: {current} -> {args.instance}")
+    else:
+        print("Error: failed to update settings.toml")
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()