## ADDED Requirements

### Requirement: Declared field ownership constrains config editing
Platform-projected plugin declarations SHALL associate each modeled configuration field with a declared logical file key so the frontend can invoke existing diff and approval APIs without accepting arbitrary file targets.

#### Scenario: Preview uses an owning declared config file
- **WHEN** a modeled field change is previewed
- **THEN** the frontend MUST use the field's declared logical file key and MUST NOT accept a host path or user-supplied target key