# Product Implementation Completeness Gate — Cycle 6

**Cycle**: 6
**Date**: 2026-05-12
**Scope**: AZ-505 (batch 1)

## Inputs Reviewed

- `_docs/02_tasks/done/AZ-505_tile_inventory_http2_leaflet_index.md`
- `_docs/02_document/architecture.md`
- `_docs/02_document/system-flows.md`
- `_docs/02_document/contracts/api/tile-inventory.md` v1.0.0 (this cycle)
- `_docs/02_document/contracts/data-access/tile-storage.md` v2.0.0 (this cycle)
- `_docs/02_document/components/02_data_access/description.md`
- `_docs/02_document/modules/api_program.md`
- `_docs/02_document/modules/dataaccess_tile_repository.md`
- `_docs/03_implementation/batch_01_cycle6_report.md`
- `_docs/03_implementation/reviews/batch_01_cycle6_review.md`
- Source code under each task's ownership envelope

## Per-Task Classification

### AZ-505 — Tile inventory endpoint + HTTP/2 + Leaflet covering index

**Verdict**: PASS

Evidence (source code, not tests or reports):

- **`SatelliteProvider.DataAccess/Migrations/015_AddTilesLeafletPathIndex.sql`** — `CREATE INDEX tiles_leaflet_path` covering index + `DROP INDEX IF EXISTS idx_tiles_location_hash`. Forward + back-migration documented in the header. Lock-window caveat per AZ-505 Risk 2 documented.
- **`SatelliteProvider.Common/DTO/TileInventory.cs`** — five public DTOs (`TileInventoryRequest`, `TileCoord`, `TileInventoryResponse`, `TileInventoryEntry`, `TileInventoryLimits`) matching the v1.0.0 `tile-inventory.md` contract Shape section.
- **`SatelliteProvider.Common/Utils/Uuidv5.cs`** — `LocationHashForTile(int z, int x, int y)` static; single source-of-truth for the cross-repo `UUIDv5(TileNamespace, "{z}/{x}/{y}")` formula. Eliminates the duplication that auto-fix flagged (Medium / Maintainability) during code review.
- **`SatelliteProvider.Common/Interfaces/ITileService.cs`** — `GetInventoryAsync` added.
- **`SatelliteProvider.DataAccess/Repositories/ITileRepository.cs`** — `GetTilesByLocationHashesAsync` added.
- **`SatelliteProvider.DataAccess/Repositories/TileRepository.cs`** — `GetByTileCoordinatesAsync` rewired to filter by `location_hash` (computed via `Uuidv5.LocationHashForTile`); selection rule preserved. `GetTilesByLocationHashesAsync` implemented via Npgsql-direct `NpgsqlCommand` with `NpgsqlDbType.Array | Uuid` parameter binding + manual `NpgsqlDataReader` mapping. The Dapper-bypass is justified inline (Dapper's `IEnumerable` expansion is incompatible with `ANY($1::uuid[])`).
- **`SatelliteProvider.Services.TileDownloader/TileService.cs`** — `GetInventoryAsync` implements the ordering invariant + Form-A / Form-B / present-absent shaping. `BuildTileEntity`'s `locationHashName` site is also consolidated to `Uuidv5.LocationHashForTile`.
- **`SatelliteProvider.Api/Program.cs`** — `app.MapPost("/api/satellite/tiles/inventory", GetTilesInventory).RequireAuthorization().Accepts<TileInventoryRequest>("application/json").Produces<TileInventoryResponse>(200).ProducesProblem(400).WithOpenApi(...)`. Inline `GetTilesInventory` handler enforces body XOR + 5000-cap before delegating to `ITileService.GetInventoryAsync`. Kestrel configured with `HttpProtocols.Http1AndHttp2` on every listener via `builder.WebHost.ConfigureKestrel(opts => opts.ConfigureEndpointDefaults(lo => lo.Protocols = HttpProtocols.Http1AndHttp2))`.

Search for unresolved markers in modified source:

```
$ rg -i 'placeholder|TODO|NotImplemented|scaffold|native bridge|fake|mock' \
    SatelliteProvider.Api/Program.cs \
    SatelliteProvider.Common/DTO/TileInventory.cs \
    SatelliteProvider.Common/Interfaces/ITileService.cs \
    SatelliteProvider.Common/Utils/Uuidv5.cs \
    SatelliteProvider.DataAccess/Migrations/015_AddTilesLeafletPathIndex.sql \
    SatelliteProvider.DataAccess/Repositories/ITileRepository.cs \
    SatelliteProvider.DataAccess/Repositories/TileRepository.cs \
    SatelliteProvider.Services.TileDownloader/TileService.cs
```

→ no matches. (`stub` matches appear only in test-only fixtures from prior cycles; out of this task's scope.)

Named technologies / integrations promised by the task:

- **`tiles_leaflet_path` covering index** — created by migration 015; verified to exist when migrations run on a fresh DB.
- **Kestrel HTTP/2 (`Http1AndHttp2`)** — wired via `builder.WebHost.ConfigureKestrel` per the AZ-505 Outcome bullet 3. Dev listener bound to `https://+:8080` with `./certs/api.pfx` so ALPN can advertise `h2` (Kestrel requires TLS for HTTP/2 negotiation); cert generation is idempotent via `scripts/run-tests.sh` and `certs/` is gitignored. AC-5 integration test confirms `HttpResponseMessage.Version == 2.0` over 20 concurrent multiplexed GETs.
- **Npgsql `ANY($1::uuid[])` array binding** — used in `GetTilesByLocationHashesAsync`. The escape from Dapper is documented inline and is the production behaviour exercised by the AC-1 / AC-4 integration tests.
- **Cross-repo `Uuidv5.TileNamespace`** — unchanged from AZ-503. AZ-505 consumes the existing constant via `Uuidv5.LocationHashForTile`. The sibling-repo's Python `c6_tile_cache/_uuid.py:TILE_NAMESPACE` is owned by `gps-denied-onboard` and is **out of scope for the satellite-provider workspace** per the AZ-505 Constraints section.

End-to-end production pipeline check: `POST /api/satellite/tiles/inventory` accepts XOR body shapes, delegates to `ITileService.GetInventoryAsync`, which composes `Uuidv5.LocationHashForTile` + `ITileRepository.GetTilesByLocationHashesAsync` (a real Npgsql query against the live DB, not a stub). `GET /tiles/{z}/{x}/{y}` (via `ServeTile`) now hits `tiles_leaflet_path` as an `Index Only Scan` — verified by `LeafletPathIndexOnlyTests` against the seeded fixture. No mocks, no scaffolded fallbacks anywhere on the hot path.

## Gate Verdict: PASS

Every promise from the AZ-505 task spec is implemented as production behaviour.

- No FAIL.
- No BLOCKED.
- No remediation tasks required.
- Proceed to /implement Step 16 (Final Test Run). Per the existing-code flow, the next autodev step (Step 11 — Run Tests) owns the full-suite gate, so /implement Step 16 hands off to autodev Step 11 rather than re-running the suite.

## Files / Symbols Checked

Production code:
- `SatelliteProvider.Api/Program.cs` (Kestrel config + endpoint registration + handler)
- `SatelliteProvider.Common/DTO/TileInventory.cs` (5 DTOs)
- `SatelliteProvider.Common/Interfaces/ITileService.cs` (1 method added)
- `SatelliteProvider.Common/Utils/Uuidv5.cs` (1 method added)
- `SatelliteProvider.DataAccess/Migrations/015_AddTilesLeafletPathIndex.sql`
- `SatelliteProvider.DataAccess/Repositories/ITileRepository.cs` (1 method added)
- `SatelliteProvider.DataAccess/Repositories/TileRepository.cs` (`GetByTileCoordinatesAsync` rewrite + `GetTilesByLocationHashesAsync` added)
- `SatelliteProvider.Services.TileDownloader/TileService.cs` (`GetInventoryAsync` added + `BuildTileEntity` consolidated to `Uuidv5.LocationHashForTile`)

DB schema (post-migration):
- `tiles_leaflet_path` covering index on `(location_hash, captured_at DESC, updated_at DESC, id DESC) INCLUDE (file_path, source)`
- `idx_tiles_location_hash` dropped

Contracts:
- `_docs/02_document/contracts/api/tile-inventory.md` v1.0.0 (new) — matches implementation Shape, Invariants, Test Cases
- `_docs/02_document/contracts/data-access/tile-storage.md` v2.0.0 (major bump) — captures AZ-503-foundation columns + AZ-505 covering index + read-rewrite; Change Log entry names both producer tasks

Tests (existence + AC mapping verified):
- `SatelliteProvider.IntegrationTests/TileInventoryTests.cs` (AC-1, AC-2, AC-4, AC-6)
- `SatelliteProvider.IntegrationTests/Http2MultiplexingTests.cs` (AC-5)
- `SatelliteProvider.IntegrationTests/LeafletPathIndexOnlyTests.cs` (AC-3)

## Unresolved Scaffold / Native Placeholders: None

## Named Promised Technologies Not Integrated: None

(All named integrations — `tiles_leaflet_path`, Kestrel HTTP/2, Npgsql `ANY($1::uuid[])` array binding, cross-repo `Uuidv5.TileNamespace` — are integrated and exercised by AC tests.)

## Required Remediation Tasks: None

Cycle 6 is complete from the implementation perspective. The full integration-test gate is owned by autodev Step 11 (test-run skill) per the handoff in `implementation_report_tile_inventory_cycle6.md`.

## Post-gate correction (Run Tests step, follow-up commit)

The Step 11 (Run Tests) execution surfaced an AC-5 runtime gap that the source-code-only completeness gate could not catch: `HttpProtocols.Http1AndHttp2` on a plaintext listener silently downgrades to HTTP/1.1-only (Kestrel logs `HTTP/2 is not enabled for [::]:8080 ... TLS is not enabled`), so the multiplexed-GET test failed with `HTTP_1_1_REQUIRED`. The corrective commit (`[AZ-505] AC-5 fix: enable TLS for HTTP/2 via ALPN`) switches the dev listener to TLS on `https://+:8080` so ALPN can negotiate `h2`. Details — including the cert-generation script, docker-compose binding, integration-test CA trust setup, and two unrelated test-data fixes also caught on the rerun (Google-Maps-404 coords in `Http2MultiplexingTests`; `DateTime.Kind=Utc` vs `timestamp without time zone` in three raw-Npgsql seed paths; the stale `idx_tiles_location_hash` assertion in `MigrationTests`) — are in `implementation_report_tile_inventory_cycle6.md` → "Post-merge correction". The full integration test suite now passes (mode=full, exit 0). Gate verdict remains **PASS**: every named AZ-505 technology is integrated and exercised by a green AC test.