| Source Feature | Recipe § | Implementation | Test | Status |
| :--- | :--- | :--- | :--- | :--- |
| Grid Layout | 2.1 | CSS Grid | Manual | ✓ |
| Aspect Ratio | 2.2 | Min-height / Padding | Manual | ✓ |
| Default Options | 2.4 | Array fallback | Unit | ✓ |
| Selection Visuals | 2.3 | Conditional CSS | Manual | ✓ |