# Structural Snapshot — 2026-06-26 (post-cycle 13, capturedAt DateTimeOffset)

Cycle 13 delta against `structure_2026-06-25_cycle10.md` (no cycle 11/12 structure snapshots on disk). Source: `_docs/02_document/module-layout.md` + on-disk `*.csproj` graph.

## Projects

| Layer | csproj | Cycle 13 delta |
|-------|--------|----------------|
| 2 (Common) | `SatelliteProvider.Common` | `UtcOffsetRequiredDateTimeOffsetConverter` + `UavTileMetadata.CapturedAt` type change |
| 4 (API) | `SatelliteProvider.Api` | Validator + `UavUploadValidationFilter` message propagation |
| 3 (Application) | `SatelliteProvider.Services.TileDownloader` | Quality gate + upload handler UTC comparisons |
| 6 (Tests) | `SatelliteProvider.Tests`, `SatelliteProvider.IntegrationTests` | Converter + UAV validation tests |

**Project count**: **10** (unchanged).

## Cross-Project Import Edges

**Total ProjectReference edges**: **23** (unchanged). **Import cycles**: 0.

## Contract coverage

| Surface | Contract | Cycle 13 delta |
|---------|----------|----------------|
| UAV upload metadata | `uav-tile-upload.md` v1.2.1 | patch — explicit UTC offset on `capturedAt` |
| gRPC `DeliverRouteTiles` | `tile_provision.proto` | unchanged |
| REST error envelope | `error-shape.md` v1.0.1 | unchanged |

**gRPC perf coverage**: PT-10 verified (cycle 12); cycle 13 did not regress.