# Graph Query and Search API

## Module
Graph

## Status
VERIFIED

## Description
Graph API with query, search, and path services for traversing and querying dependency graphs.

## Implementation Details
- **Query service**: `src/Graph/StellaOps.Graph.Api/Services/IGraphQueryService.cs`, `InMemoryGraphQueryService.cs` -- graph node/edge query with filtering
- **Search service**: `src/Graph/StellaOps.Graph.Api/Services/IGraphSearchService.cs`, `InMemoryGraphSearchService.cs` -- full-text search across graph entities
- **Path service**: `src/Graph/StellaOps.Graph.Api/Services/IGraphPathService.cs`, `InMemoryGraphPathService.cs` -- shortest-path and reachability path queries
- **Repository**: `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphRepository.cs` -- in-memory graph data store
- **Search contracts**: `src/Graph/StellaOps.Graph.Api/Contracts/SearchContracts.cs` -- search request/response DTOs
- **Lineage contracts**: `src/Graph/StellaOps.Graph.Api/Contracts/LineageContracts.cs` -- lineage query contracts
- **Reachability contracts**: `src/Graph/StellaOps.Graph.Api/Contracts/ReachabilityContracts.cs` -- reachability query contracts
- **Rate limiting**: `src/Graph/StellaOps.Graph.Api/Services/RateLimiterService.cs` -- query rate limiting
- **Tests**: `src/Graph/__Tests/StellaOps.Graph.Api.Tests/QueryServiceTests.cs`, `SearchServiceTests.cs`, `PathServiceTests.cs`, `RateLimiterServiceTests.cs`
- **Source**: Feature matrix scan

## E2E Test Plan
- [x] Verify query API returns nodes and edges matching filter criteria
- [x] Test full-text search returns ranked results across graph entities
- [x] Verify path queries find shortest paths between nodes
- [x] Test rate limiting prevents query abuse
- [x] Verify search contracts handle empty results and pagination

## Verification
- **Run ID**: run-001
- **Date**: 2026-02-09T16:00:00Z
- **Tier**: 1 (Build + Test)
- **Result**: PASS
- **Evidence**: Query/search/path/rate-limiter tests all pass. All source files verified (15/15).

### Tier 2 Recheck (API Behavior)
- **Run ID**: run-002
- **Date**: 2026-02-10T11:35:00Z
- **Tier**: 2 (End-to-end API verification)
- **Result**: PASS
- **Evidence**: Verified `POST /graph/search` and `POST /graph/query` behavior for authenticated, unauthorized, forbidden, and missing-tenant paths. Tier 2 artifact: `docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-002/tier2-api-check.json`.

### Tier 2 Recheck (Data Path)
- **Run ID**: run-003
- **Date**: 2026-02-10T11:47:30Z
- **Tier**: 2 (End-to-end API verification)
- **Result**: PASS
- **Evidence**: Revalidated runtime query/search data path after repository DI seeding fix. Verified non-empty node NDJSON responses for component queries. Artifact: `docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-003/tier2-api-check.json`.

## Recheck (Run-005)
- **Verified**: 2026-02-10
- **Method**: Tier 2a API replay validated via Graph.Api integration suite.
- **Tests**: PASS (`src/Graph/__Tests/StellaOps.Graph.Api.Tests`: 66/66).
- **Tier 2 Evidence**: `docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-005/tier2-api-check.json`
- **Outcome**: Query/search API behavior remains healthy with tenant/auth coverage intact.

## Recheck (Run-006)
- **Verified**: 2026-02-10
- **Method**: Tier 2 replay validated via Graph API/indexer suites.
- **Tests**: PASS (src/Graph/__Tests/StellaOps.Graph.Api.Tests: 66/66; src/Graph/__Tests/StellaOps.Graph.Indexer.Tests: 37/37; src/Graph/__Tests/StellaOps.Graph.Indexer.Persistence.Tests: 17/17).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-006/tier2-api-check.json
- **Outcome**: Query/search API behavior remains healthy with tenant/auth coverage intact.

## Recheck (Run-007)
- **Verified**: 2026-02-10
- **Method**: Tier 2 replay validated via Graph API/indexer suites.
- **Tests**: PASS (src/Graph/__Tests/StellaOps.Graph.Api.Tests: 66/66; src/Graph/__Tests/StellaOps.Graph.Indexer.Tests: 37/37; src/Graph/__Tests/StellaOps.Graph.Indexer.Persistence.Tests: 17/17).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-007/tier2-api-check.json
- **Outcome**: Query/search API behavior remains healthy with tenant/auth coverage intact.

## Recheck (Run-008)
- **Verified**: 2026-02-10
- **Method**: Tier 2 replay validated via Graph API/indexer suites.
- **Tests**: PASS (src/Graph/__Tests/StellaOps.Graph.Api.Tests: 66/66; src/Graph/__Tests/StellaOps.Graph.Indexer.Tests: 37/37; src/Graph/__Tests/StellaOps.Graph.Indexer.Persistence.Tests: 17/17).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-008/tier2-api-check.json
- **Outcome**: Query/search API behavior remains healthy with tenant/auth coverage intact.

## Recheck (Run-009)
- **Verified**: 2026-02-10
- **Method**: Tier 2a API replay + deterministic integration suite replay.
- **Tests**: PASS (Graph.Api.Tests 66/66, Graph.Indexer.Tests 37/37, Graph.Indexer.Persistence.Tests 17/17).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-009/tier2-api-check.json
- **Outcome**: Checked Graph behavior remains healthy in continued replay.


## Recheck (Run-010)
- **Verified**: 2026-02-10
- **Method**: Tier 2d deterministic integration replay.
- **Tests**: PASS (Graph Api 66/66, Indexer 37/37, Indexer.Persistence 17/17; total 120/120).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-010/tier2-integration-check.json
- **Outcome**: Checked graph behavior remains healthy in continued replay.
## Recheck (Run-011)
- **Verified**: 2026-02-10
- **Method**: Tier 2d deterministic integration replay.
- **Tests**: PASS (Graph Api 66/66, Indexer 37/37, Indexer.Persistence 17/17; total 120/120).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-011/tier2-integration-check.json
- **Outcome**: Checked graph behavior remains healthy in continued replay.
## Recheck (Run-012)
- **Verified**: 2026-02-10
- **Method**: Tier 2 replay + deterministic Graph suite replay.
- **Tests**: PASS (Graph.Api 66/66, Graph.Indexer 37/37, Graph.Indexer.Persistence 17/17; total 120/120).
- **Tier 2 Evidence**: docs/qa/feature-checks/runs/graph/graph-query-and-search-api/run-012/tier2-api-check.json
- **Outcome**: Checked graph behavior remains healthy in continued replay.