# Phase 6 — Verification Report (03-code-quality-refactoring)

**Date**: 2026-05-11
**Mode**: Verification gate via `scripts/run-tests.sh --smoke`
**Verdict**: PASS — all gates green, no regressions detected

## 6a. Test Run Summary

| Suite | Mode | Outcome | Pass / Total | Wall-clock |
|-------|------|---------|--------------|------------|
| Format gate | `dotnet format whitespace --verify-no-changes` | PASS | n/a | ~25 s (Docker startup + format) |
| Unit tests | `dotnet test SatelliteProvider.Tests` (Release, with Coverlet) | PASS | 200 / 200 | ~9.5 s |
| Integration smoke | `--smoke` (subset, tightened timeouts) | PASS | All scenarios green | ~90 s wall-clock total run |

Smoke scenarios exercised: TileTests (lat/lon + z/x/y), RegionTests (200m / Zoom18 happy path + failure path), BasicRouteTests, ExtendedRouteTests (zip), idempotent POST contract (AZ-362), Migration 012 dedupe + index reshape (AZ-357), AZ-356 stub endpoints (501), AZ-353 sanitized 5xx contract, security tests (SEC-01..SEC-04), CORS contract (AZ-354).

No failed assertions. No swallowed exceptions. The expected ProblemDetails ERR log for SEC-04 (malformed JSON body) appears once and is deliberate — it exercises the unhandled-exception path through `IExceptionHandler` introduced by AZ-353 and the smoke runner asserts HTTP 400 + sanitized payload, both of which it received.

## 6b. Final Metrics

| Metric | Baseline (Phase 0, 2026-05-10) | Final (Phase 6, 2026-05-11) | Delta | Status |
|--------|--------------------------------|-----------------------------|-------|--------|
| Unit tests (count) | 37 | 200 | +163 | Improved |
| Integration smoke scenarios | 5 | 5 (no removals) + extended with AZ-353/AZ-356/AZ-357/AZ-362/SEC-01..04/CORS | net +9+ scenarios | Improved |
| Format gate | none | `dotnet format whitespace --verify-no-changes` runs as Step 0 in `run-tests.sh` | added | Improved |
| Static analyzers | defaults only | `Microsoft.CodeAnalysis.NetAnalyzers` enabled via `Directory.Build.props` (CA1001, CA1051, CA1816, CA2227 elevated to warning) | added | Improved |
| Coverage tooling | none | Coverlet collector wired; `--collect:"XPlat Code Coverage"` writes `cobertura.xml` to `TestResults/` per run | added | Improved |
| Editor convention pin | none | `.editorconfig` at repo root pins indent (4 sp), LF, UTF-8 (no BOM), trim trailing, file-scoped namespaces | added | Improved |
| Centralized const home (Earth + tile) | duplicated in `GoogleMapsDownloaderV2`, `TileRepository`, `GeoUtils` | one source on `GeoUtils` (Earth) and `MapConfig.DefaultTileSizePixels` (pixels) | -2 duplication sites | Improved |
| Existing-tile lookup complexity | O(N) per cell × O(grid) cells | O(1) per cell after one O(existingTiles) preprocess | algorithmic | Improved |
| Repository SELECT column duplication | per-method inline column lists | one `private const string ColumnList` per repo, used by all SELECTs | -7+ duplication sites | Improved |
| Dead methods (unused public surface) | `FindExistingTileAsync`, `CalculatePolygonDiagonalDistance` | removed | -2 | Improved |
| Repo logger fields without log calls | `_logger` declared & unused in 3 repos | `RegionRepository`, `RouteRepository` no longer take a logger; `TileRepository` keeps it AND emits slow-query warnings (`SlowQueryThresholdMs=500`) | usage now matches declarations | Improved |
| Top-level `Services` god-csproj | 1 csproj, 3 logical components share files | 3 separate csprojs (TileDownloader, RegionProcessing, RouteManagement); cross-sibling calls only via `Common.Interfaces` | physical boundary added | Improved (carried from 02-coupling) |
| `IExceptionHandler` for sanitized 5xx | none | `GlobalExceptionHandler` registered, BadHttpRequestException honors framework status, others sanitized | added | Improved |
| Architectural findings (Critical / High / Medium / Low) — cumulative review | n/a (baseline scan) | 0 / 0 / 0 / 4 | within target | Within tolerance |

## 6c. Acceptance Criteria Checklist (from `baseline_metrics.md` Phase 0a)

| AC | Status | Evidence |
|----|--------|----------|
| 1. Code-smell inventory across all production projects (error handling gaps, SRP, magic numbers, hidden side effects, async-correctness, thread-safety, duplication) | Met | `_docs/04_refactoring/03-code-quality-refactoring/list-of-changes.md` (27 entries C01..C27, severity-tagged) |
| 2. Inventory delivered in `list-of-changes.md` template directly consumable by `/implement` | Met | `_docs/04_refactoring/03-code-quality-refactoring/list-of-changes.md`; 27 corresponding `AZ-3{51..80}` task files in `_docs/02_tasks/done/` |
| 3. Roadmap (Phase 2) ranks by ROI and groups into ≤5-point batches | Met | `_docs/04_refactoring/03-code-quality-refactoring/analysis/refactoring_roadmap.md`; tracker rule respected (no task above 5 pts; 13-pt PBIs split before tracker creation) |
| 4. No regression in unit (37→200) or smoke (5+) suites | Met | This report §6a — 200/200 unit, all smoke scenarios green |
| 5. Phase 0 gate decision (execute vs. Quick Assessment) | Met | User chose execute; full Phases 0-7 ran |

## Constraint Compliance (from baseline §Constraints)

| Constraint | Status | Notes |
|------------|--------|-------|
| No public HTTP route changes | Met | `/api/satellite/tiles/latlon`, `/tiles/{z}/{x}/{y}`, `/request`, `/route` shapes unchanged. Stub endpoints `/tiles/mgrs`, `/upload` now return 501 (was 500) — surface unchanged, semantics tightened per AZ-356. |
| No DB schema changes (other than the explicit AZ-357 migration) | Met | Migration 012 (`AZ-357`) was scoped, dedupe-then-uniq-index — explicit list-of-changes entry, not a silent migration. No other migrations added by this run. |
| No DI-graph reorder that would change observable startup behavior | Met | DI rewires (`AddTileDownloader`, `AddRegionProcessing`, `AddRouteManagement`) replicate the prior registrations; `RegionProcessingService` and `RouteProcessingService` still resolve the same dependencies. Smoke run executed both hosted services successfully. |
| Architecture Vision honored | Met | Phase 7 architecture-compliance scan (cumulative review) flagged 0 new violations. The one Low/Architecture finding (F1) is *documentation drift* — the existing `module-layout.md` understates a pre-existing DataAccess→Common dependency that this run extended (Common.Configs, Common.Utils added to the surface). Code is correct; documentation needs a refresh in Phase 7. |

## Regressions

None observed. The four Low-severity findings from the cumulative K=3 review (batches 22-24) are documentation drift, deliberate trade-offs, or pre-existing carry-overs — none are regressions caused by this refactor run.

## Self-Verification

- [x] All tests pass (zero failures across format + 200 unit + smoke)
- [x] All Phase 0 acceptance criteria met
- [x] No critical metric regressions
- [x] Metrics captured with the same tools as Phase 0 where applicable; new tools (format gate, Coverlet, NetAnalyzers) explicitly noted as **added** in the metrics table
- [x] Cumulative review report exists (`_docs/03_implementation/reviews/cumulative_review_22-24.md`) and is referenced

## Notes for Phase 7 (Documentation)

The Phase 7 documentation pass should at minimum:

1. Update `_docs/02_document/module-layout.md` to reflect actual DataAccess→Common dependency (`Common.Enums`, `Common.Configs`, `Common.Utils`).
2. Update `_docs/02_document/architecture_compliance_baseline.md` F5 entry — the resolution claim "DataAccess Imports from: (none)" was already inaccurate at baseline time; flag as known doc drift.
3. Note in `_docs/02_document/architecture.md` that the Common→DataAccess invariant is now: **DataAccess MAY import from Common (leaf-most) but Common MUST NOT import from DataAccess**. This is the actual layering.
4. Update tooling section of `_docs/02_document/00_discovery.md` (or equivalent) to mention `dotnet format`, `Microsoft.CodeAnalysis.NetAnalyzers`, and Coverlet.

## Verdict

**PASS**. All Phase 0 goals met, no regressions, Phase 7 may proceed.
