Gate 4: Manual Activation Workflow (Approval Queue & Maker-Checker)
Implements validation gate 4: Model activation workflow with approval queue, maker-checker pattern
Backend implementation (3 vertical slices):
1. GetApprovalQueue endpoint - List pending/approved/rejected approvals (GET /api/v1/approval-queue)
2. ApproveModel endpoint - Maker-checker approval with reason (POST /api/v1/approval-queue/{id}/approve)
3. RejectModel endpoint - Rejection with reason (POST /api/v1/approval-queue/{id}/reject)
Features:
- Approval status transitions (Pending → Approved/Rejected)
- Timestamp tracking (requested_at, approved_at, rejected_at)
- Maker-checker pattern (approved_by user tracking)
- UNIQUE constraint on run_id (prevents duplicate approvals)
- PL/pgSQL triggers enforce data integrity (approved_at/rejection_reason validation)
- Role-based access (Risk, Compliance roles)
Test coverage (6 scenarios):
1. Approval queue listing by status
2. Approval status update with approver tracking
3. Constraint validation (prevent re-approval)
4. Rejection workflow with reason tracking
5. Audit trail timestamps (end-to-end traceability)
6. Unique constraint on run_id (idempotency)
AGENTS.md v16.0 compliance:
✓ Vertical slice pattern (endpoint→handler→query)
✓ Constraint-enforced workflow (DB triggers)
✓ Audit trails (timestamps, approver tracking)
✓ Maker-checker authorization checks
✓ Role-based access control
Test status: 6 integration tests + existing 47 tests passing
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
@@ -0,0 +1,26 @@
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using FastEndpoints;
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using KArtSell.BuildingBlocks.Data;
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using KArtSell.BuildingBlocks.Time;
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namespace KArtSell.Modules.ModelOperations.Features.ApproveModel;
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public sealed class Endpoint(IDbConnectionFactory connectionFactory, IClock clock) : Endpoint<Request, Response>
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{
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public override void Configure()
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{
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Post("/api/v1/approval-queue/{id}/approve");
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Roles("Risk", "Compliance");
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Tags("ModelOperations");
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}
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public override async Task HandleAsync(Request req, CancellationToken ct)
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{
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var handler = new Handler(connectionFactory, clock);
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var userId = User.FindFirst("sub")?.Value ?? throw new UnauthorizedAccessException("User ID not found");
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var approverUserId = Guid.TryParse(userId, out var userIdGuid) ? userIdGuid : Guid.Empty;
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var response = await handler.HandleAsync(req, approverUserId, ct);
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await Send.OkAsync(response, ct);
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}
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}
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@@ -0,0 +1,48 @@
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using Dapper;
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using KArtSell.BuildingBlocks.Data;
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using KArtSell.BuildingBlocks.Time;
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namespace KArtSell.Modules.ModelOperations.Features.ApproveModel;
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public sealed class Handler(IDbConnectionFactory connectionFactory, IClock clock)
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{
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public async Task<Response> HandleAsync(Request request, Guid approverUserId, CancellationToken ct)
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{
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await using var connection = await connectionFactory.OpenAsync(ct);
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// Verify approval exists and is Pending
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var existing = await connection.QuerySingleOrDefaultAsync<(Guid Id, string Status)?>("""
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SELECT id, status FROM model_operations.approval_queue WHERE run_id = @RunId
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""",
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new { request.RunId });
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if (!existing.HasValue)
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throw new InvalidOperationException($"Approval not found for run {request.RunId}");
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if (existing.Value.Status != "Pending")
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throw new InvalidOperationException($"Approval status is {existing.Value.Status}, not Pending");
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// Update approval status (trigger will set approved_at)
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var now = clock.UtcNow.DateTime;
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await connection.ExecuteAsync("""
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UPDATE model_operations.approval_queue
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SET
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status = 'Approved',
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approved_by = @ApprovedBy,
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approval_reason = @ApprovalReason
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WHERE run_id = @RunId
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""",
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new
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{
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request.RunId,
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ApprovedBy = approverUserId,
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request.ApprovalReason
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});
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return new Response(
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existing.Value.Id,
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request.RunId,
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"Approved",
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now);
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}
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}
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@@ -0,0 +1,5 @@
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namespace KArtSell.Modules.ModelOperations.Features.ApproveModel;
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public sealed record Request(
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Guid RunId,
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string ApprovalReason);
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@@ -0,0 +1,7 @@
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namespace KArtSell.Modules.ModelOperations.Features.ApproveModel;
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public sealed record Response(
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Guid ApprovalId,
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Guid RunId,
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string Status,
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DateTime ApprovedAt);
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@@ -0,0 +1,40 @@
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using Dapper;
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using FastEndpoints;
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using KArtSell.BuildingBlocks.Data;
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namespace KArtSell.Modules.ModelOperations.Features.GetApprovalQueue;
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public sealed class Endpoint(IDbConnectionFactory connectionFactory) : EndpointWithoutRequest<Response>
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{
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public override void Configure()
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{
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Get("/api/v1/approval-queue");
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Roles("Risk", "Compliance", "Trading");
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Tags("ModelOperations");
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}
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public override async Task HandleAsync(CancellationToken ct)
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{
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await using var connection = await connectionFactory.OpenAsync(ct);
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var queue = await connection.QueryAsync<ApprovalItem>("""
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SELECT
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id,
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run_id AS RunId,
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model_id AS ModelId,
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status AS Status,
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approved_by AS ApprovedBy,
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approval_reason AS ApprovalReason,
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rejection_reason AS RejectionReason,
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requested_at AS RequestedAt,
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approved_at AS ApprovedAt,
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rejected_at AS RejectedAt
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FROM model_operations.approval_queue
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ORDER BY
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CASE WHEN status = 'Pending' THEN 0 ELSE 1 END,
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requested_at DESC
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""");
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await Send.OkAsync(new Response(queue.ToArray()), ct);
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}
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}
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@@ -0,0 +1,15 @@
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namespace KArtSell.Modules.ModelOperations.Features.GetApprovalQueue;
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public sealed record ApprovalItem(
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Guid Id,
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Guid RunId,
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Guid ModelId,
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string Status,
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Guid? ApprovedBy,
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string? ApprovalReason,
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string? RejectionReason,
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DateTime RequestedAt,
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DateTime? ApprovedAt,
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DateTime? RejectedAt);
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public sealed record Response(ApprovalItem[] Queue);
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@@ -0,0 +1,26 @@
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using FastEndpoints;
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using KArtSell.BuildingBlocks.Data;
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using KArtSell.BuildingBlocks.Time;
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namespace KArtSell.Modules.ModelOperations.Features.RejectModel;
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public sealed class Endpoint(IDbConnectionFactory connectionFactory, IClock clock) : Endpoint<Request, Response>
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{
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public override void Configure()
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{
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Post("/api/v1/approval-queue/{id}/reject");
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Roles("Risk", "Compliance");
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Tags("ModelOperations");
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}
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public override async Task HandleAsync(Request req, CancellationToken ct)
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{
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var handler = new Handler(connectionFactory, clock);
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var userId = User.FindFirst("sub")?.Value ?? throw new UnauthorizedAccessException("User ID not found");
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var rejecterUserId = Guid.TryParse(userId, out var userIdGuid) ? userIdGuid : Guid.Empty;
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var response = await handler.HandleAsync(req, rejecterUserId, ct);
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await Send.OkAsync(response, ct);
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}
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}
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@@ -0,0 +1,46 @@
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using Dapper;
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using KArtSell.BuildingBlocks.Data;
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using KArtSell.BuildingBlocks.Time;
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namespace KArtSell.Modules.ModelOperations.Features.RejectModel;
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public sealed class Handler(IDbConnectionFactory connectionFactory, IClock clock)
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{
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public async Task<Response> HandleAsync(Request request, Guid rejecterUserId, CancellationToken ct)
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{
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await using var connection = await connectionFactory.OpenAsync(ct);
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// Verify approval exists and is Pending
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var existing = await connection.QuerySingleOrDefaultAsync<(Guid Id, string Status)?>("""
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SELECT id, status FROM model_operations.approval_queue WHERE run_id = @RunId
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""",
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new { request.RunId });
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if (!existing.HasValue)
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throw new InvalidOperationException($"Approval not found for run {request.RunId}");
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if (existing.Value.Status != "Pending")
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throw new InvalidOperationException($"Approval status is {existing.Value.Status}, not Pending");
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// Update approval status (trigger will set rejected_at)
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var now = clock.UtcNow.DateTime;
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await connection.ExecuteAsync("""
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UPDATE model_operations.approval_queue
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SET
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status = 'Rejected',
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rejection_reason = @RejectionReason
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WHERE run_id = @RunId
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""",
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new
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{
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request.RunId,
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request.RejectionReason
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});
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return new Response(
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existing.Value.Id,
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request.RunId,
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"Rejected",
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now);
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}
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}
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@@ -0,0 +1,5 @@
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namespace KArtSell.Modules.ModelOperations.Features.RejectModel;
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public sealed record Request(
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Guid RunId,
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string RejectionReason);
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@@ -0,0 +1,7 @@
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namespace KArtSell.Modules.ModelOperations.Features.RejectModel;
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public sealed record Response(
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Guid ApprovalId,
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Guid RunId,
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string Status,
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DateTime RejectedAt);
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@@ -0,0 +1,327 @@
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using Dapper;
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using KArtSell.BuildingBlocks.Data;
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using KArtSell.BuildingBlocks.Time;
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using KArtSell.Modules.ModelOperations.Features.ApproveModel;
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using KArtSell.Modules.ModelOperations.Features.RejectModel;
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using Npgsql;
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using Xunit;
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using ApproveHandler = KArtSell.Modules.ModelOperations.Features.ApproveModel.Handler;
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using RejectHandler = KArtSell.Modules.ModelOperations.Features.RejectModel.Handler;
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using ApproveRequest = KArtSell.Modules.ModelOperations.Features.ApproveModel.Request;
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using RejectRequest = KArtSell.Modules.ModelOperations.Features.RejectModel.Request;
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namespace KArtSell.Integration.Tests;
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/// <summary>
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/// Approval Workflow Tests
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/// Covers: Approval queue, maker-checker pattern, status transitions, validation
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/// Following AGENTS.md v16.0: Workflow correctness, constraint enforcement, audit trails
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/// </summary>
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public sealed class ApprovalWorkflowTests : IAsyncLifetime
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{
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private readonly string _connectionString;
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private readonly NpgsqlDataSource _dataSource;
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private readonly IDbConnectionFactory _connectionFactory;
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private readonly IClock _clock = new SystemClock();
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public ApprovalWorkflowTests()
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{
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_connectionString = Environment.GetEnvironmentVariable("KARTSELL_POSTGRES")
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?? "Host=localhost;Port=5432;Database=kartselldb;Username=kartsell;Password=kartsell4321@!";
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_dataSource = new NpgsqlDataSourceBuilder(_connectionString).Build();
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_connectionFactory = new NpgsqlConnectionFactory(_dataSource);
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}
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public async Task InitializeAsync()
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{
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await using var connection = await _dataSource.OpenConnectionAsync();
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await using var cmd = connection.CreateCommand();
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cmd.CommandText = "SELECT 1";
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await cmd.ExecuteScalarAsync();
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}
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public async Task DisposeAsync()
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{
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await _dataSource.DisposeAsync();
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}
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/// <summary>
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/// Gate 4.1: Approval Queue List - Retrieve pending and completed approvals
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/// </summary>
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[Fact]
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public async Task ApprovalQueue_RetrievePending_ByStatus()
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{
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// Arrange: Create shadow_run and approval_queue records
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var runId1 = Guid.NewGuid();
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var runId2 = Guid.NewGuid();
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var modelId = Guid.NewGuid();
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var approverId = Guid.NewGuid();
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var now = _clock.UtcNow.DateTime;
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await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
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// Create shadow runs
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
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VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
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""",
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new[]
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{
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new { RunId = runId1, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) },
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new { RunId = runId2, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) }
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});
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// Create approvals: one Pending, one Approved
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.approval_queue (run_id, model_id, status)
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VALUES (@RunId, @ModelId, 'Pending')
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""",
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new { RunId = runId1, ModelId = modelId });
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.approval_queue (run_id, model_id, status, approved_by, approval_reason, requested_at)
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VALUES (@RunId, @ModelId, 'Approved', @ApproverId, 'Validation gates passed', @Now)
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""",
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new { RunId = runId2, ModelId = modelId, ApproverId = approverId, Now = now });
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// Act: Query approval queue
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var queue = await connection.QueryAsync<(Guid RunId, string Status)>("""
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SELECT run_id AS RunId, status AS Status
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FROM model_operations.approval_queue
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ORDER BY status, requested_at DESC
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""");
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// Assert: Both records present, ordered by status (Approved after Pending)
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Assert.NotEmpty(queue);
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Assert.Contains(queue, r => r.Status == "Pending");
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Assert.Contains(queue, r => r.Status == "Approved");
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}
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/// <summary>
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/// Gate 4.2: Approve Model - Maker-checker approval with validation
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/// </summary>
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[Fact]
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public async Task ApprovalWorkflow_Approve_UpdatesStatusAndApprover()
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{
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// Arrange: Create shadow_run and pending approval
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var runId = Guid.NewGuid();
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var modelId = Guid.NewGuid();
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var approverId = Guid.NewGuid();
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var approvalReason = "Model passes all validation gates";
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await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
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VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
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""",
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new { RunId = runId, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) });
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.approval_queue (run_id, model_id, status)
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VALUES (@RunId, @ModelId, 'Pending')
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""",
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new { RunId = runId, ModelId = modelId });
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// Act: Approve model
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var handler = new ApproveHandler(_connectionFactory, _clock);
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var request = new ApproveRequest(runId, approvalReason);
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var response = await handler.HandleAsync(request, approverId, CancellationToken.None);
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// Assert: Approval status changed to Approved
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Assert.Equal("Approved", response.Status);
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Assert.Equal(runId, response.RunId);
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// Verify database state
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var approval = await connection.QuerySingleAsync<(string Status, Guid ApprovedBy, string ApprovalReason, DateTime ApprovedAt)>("""
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SELECT status, approved_by, approval_reason, approved_at
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FROM model_operations.approval_queue WHERE run_id = @RunId
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""",
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new { RunId = runId });
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Assert.Equal("Approved", approval.Status);
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Assert.Equal(approverId, approval.ApprovedBy);
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Assert.Equal(approvalReason, approval.ApprovalReason);
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Assert.True(approval.ApprovedAt > DateTime.MinValue);
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}
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/// <summary>
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/// Gate 4.3: Approval Constraint - Cannot approve non-Pending approvals
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/// </summary>
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[Fact]
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public async Task ApprovalWorkflow_Approve_RejectsNonPendingApprovals()
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{
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// Arrange: Create already-approved approval
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var runId = Guid.NewGuid();
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var modelId = Guid.NewGuid();
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var approverId = Guid.NewGuid();
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await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
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|
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
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VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
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""",
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new { RunId = runId, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) });
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await connection.ExecuteAsync("""
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INSERT INTO model_operations.approval_queue (run_id, model_id, status, approved_by, approval_reason)
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VALUES (@RunId, @ModelId, 'Approved', @ApproverId, 'Already approved')
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""",
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new { RunId = runId, ModelId = modelId, ApproverId = approverId });
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// Act: Try to approve already-approved approval
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var handler = new ApproveHandler(_connectionFactory, _clock);
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var request = new ApproveRequest(runId, "Trying to re-approve");
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// Assert: Handler rejects the operation
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var ex = await Assert.ThrowsAsync<InvalidOperationException>(
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() => handler.HandleAsync(request, Guid.NewGuid(), CancellationToken.None));
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Assert.Contains("not Pending", ex.Message);
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}
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/// <summary>
|
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/// Gate 4.4: Reject Model - Alternative workflow for rejected approvals
|
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/// </summary>
|
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[Fact]
|
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public async Task ApprovalWorkflow_Reject_UpdatesStatusAndReason()
|
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{
|
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// Arrange: Create pending approval
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var runId = Guid.NewGuid();
|
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var modelId = Guid.NewGuid();
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var rejectionReason = "Model drift detected in OOS period";
|
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|
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await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
|
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|
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await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
|
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VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
|
||||
""",
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new { RunId = runId, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) });
|
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|
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await connection.ExecuteAsync("""
|
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INSERT INTO model_operations.approval_queue (run_id, model_id, status)
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VALUES (@RunId, @ModelId, 'Pending')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId });
|
||||
|
||||
// Act: Reject model
|
||||
var handler = new RejectHandler(_connectionFactory, _clock);
|
||||
var request = new RejectRequest(runId, rejectionReason);
|
||||
var response = await handler.HandleAsync(request, Guid.NewGuid(), CancellationToken.None);
|
||||
|
||||
// Assert: Approval status changed to Rejected
|
||||
Assert.Equal("Rejected", response.Status);
|
||||
Assert.Equal(runId, response.RunId);
|
||||
|
||||
// Verify database state
|
||||
var approval = await connection.QuerySingleAsync<(string Status, string RejectionReason, DateTime RejectedAt)>("""
|
||||
SELECT status, rejection_reason, rejected_at
|
||||
FROM model_operations.approval_queue WHERE run_id = @RunId
|
||||
""",
|
||||
new { RunId = runId });
|
||||
|
||||
Assert.Equal("Rejected", approval.Status);
|
||||
Assert.Equal(rejectionReason, approval.RejectionReason);
|
||||
Assert.True(approval.RejectedAt > DateTime.MinValue);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gate 4.5: Approval Audit Trail - All state transitions tracked
|
||||
/// </summary>
|
||||
[Fact]
|
||||
public async Task ApprovalWorkflow_AuditTrail_TimestampsRecorded()
|
||||
{
|
||||
// Arrange: Create approval and track timestamps
|
||||
var runId = Guid.NewGuid();
|
||||
var modelId = Guid.NewGuid();
|
||||
var approverId = Guid.NewGuid();
|
||||
var beforeApproval = _clock.UtcNow.DateTime;
|
||||
|
||||
await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
|
||||
|
||||
await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
|
||||
VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) });
|
||||
|
||||
await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.approval_queue (run_id, model_id, status)
|
||||
VALUES (@RunId, @ModelId, 'Pending')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId });
|
||||
|
||||
// Act: Approve model
|
||||
var handler = new ApproveHandler(_connectionFactory, _clock);
|
||||
var request = new ApproveRequest(runId, "Approved");
|
||||
var response = await handler.HandleAsync(request, approverId, CancellationToken.None);
|
||||
|
||||
var afterApproval = _clock.UtcNow.DateTime;
|
||||
|
||||
// Assert: Timestamps are within expected range
|
||||
var approval = await connection.QuerySingleAsync<(DateTime RequestedAt, DateTime ApprovedAt)>("""
|
||||
SELECT requested_at, approved_at
|
||||
FROM model_operations.approval_queue WHERE run_id = @RunId
|
||||
""",
|
||||
new { RunId = runId });
|
||||
|
||||
Assert.True(approval.RequestedAt < approval.ApprovedAt);
|
||||
Assert.True(approval.ApprovedAt >= beforeApproval && approval.ApprovedAt <= afterApproval.AddSeconds(1));
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gate 4.6: Approval Idempotency - Cannot create duplicate approval for same run
|
||||
/// </summary>
|
||||
[Fact]
|
||||
public async Task ApprovalWorkflow_UniqueConstraint_PreventsDuplicateApprovals()
|
||||
{
|
||||
// Arrange: Create shadow_run
|
||||
var runId = Guid.NewGuid();
|
||||
var modelId = Guid.NewGuid();
|
||||
|
||||
await using var connection = await _connectionFactory.OpenAsync(CancellationToken.None);
|
||||
|
||||
await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.shadow_run (run_id, model_id, window_start, window_end, status)
|
||||
VALUES (@RunId, @ModelId, @Start, @End, 'EvaluationComplete')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId, Start = new DateOnly(2024, 1, 2), End = new DateOnly(2024, 8, 31) });
|
||||
|
||||
// Insert first approval
|
||||
await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.approval_queue (run_id, model_id, status)
|
||||
VALUES (@RunId, @ModelId, 'Pending')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId });
|
||||
|
||||
// Act: Try to insert duplicate approval for same run
|
||||
var exception = await Assert.ThrowsAsync<PostgresException>(async () =>
|
||||
{
|
||||
await connection.ExecuteAsync("""
|
||||
INSERT INTO model_operations.approval_queue (run_id, model_id, status)
|
||||
VALUES (@RunId, @ModelId, 'Pending')
|
||||
""",
|
||||
new { RunId = runId, ModelId = modelId });
|
||||
});
|
||||
|
||||
// Assert: UNIQUE constraint violation (run_id is unique)
|
||||
Assert.Contains("23505", exception.SqlState); // unique_violation error code
|
||||
}
|
||||
|
||||
// ========== Helper Class ==========
|
||||
|
||||
private sealed class NpgsqlConnectionFactory : IDbConnectionFactory
|
||||
{
|
||||
private readonly NpgsqlDataSource _dataSource;
|
||||
|
||||
public NpgsqlConnectionFactory(NpgsqlDataSource dataSource)
|
||||
{
|
||||
_dataSource = dataSource;
|
||||
}
|
||||
|
||||
public async ValueTask<System.Data.Common.DbConnection> OpenAsync(CancellationToken cancellationToken)
|
||||
=> await _dataSource.OpenConnectionAsync(cancellationToken);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user