The §5 product-space skeleton, pivoted across all ten product lines — the at-a-glance “understand at altitude” view (§3 Exec/PM). Each row is a capability section. ✓ = the product has its own pages for it (its V*/ tree, doc library, or space map); ○ = it composes the shared surface; — = a justified n/a (e.g. no Unreal engine). The footer counts own / total per product. Same _links_for resolver as the per-product space maps, so the two can never disagree.
| §5 section | V1 | V2 | V3 | V4 | V5 | V6 | V7 | V8 | V9 | V10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Overview & promise | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Architecture | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Features | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Journeys & flows | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Domains & systems | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| API & contracts | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Data & events | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Integration & config | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Design · a11y · i18n | ○ | ○ | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ |
| Performance & observability | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Operations | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Security & privacy | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Creator & help | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Release & changelog | ○ | ○ | ✓ | ○ | ○ | ✓ | ✓ | ○ | ○ | ○ |
| Testing & QA | ○ | ○ | ✓ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Engine (UE) | — | ○ | ○ | ○ | ○ | ○ | ○ | ○ | — | — |
| Develop | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ○ |
| Diagrams | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Backlog & exit | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Sections present | 6/18 | 6/19 | 12/19 | 6/19 | 7/19 | 7/19 | 7/19 | 6/19 | 6/18 | 5/18 |