- Strict config_form and fields documents keep source order and JSON scalar types
- Unknown keys, partials, path escape, and a mismatched modelClass fail activation with plugin context
- List-only controllers still activate when config_form.yaml is absent
- All locked field kinds, empty and single documents, and source order fail closed
- Unknown keys, types, duplicates, path escape, modelClass, partials, and missing assets must name the plugin, controller, and file
