more audit work

src/__Libraries/__Tests/StellaOps.TestKit.Tests/AGENTS.md

@@ -0,0 +1,29 @@
+# StellaOps.TestKit.Tests - Local Agent Charter
+
+## Roles
+- Backend developer
+- QA automation engineer
+
+## Working directory
+- src/__Libraries/__Tests/StellaOps.TestKit.Tests
+
+## Allowed dependencies
+- src/__Libraries/StellaOps.TestKit
+- src/__Libraries/StellaOps.Canonical.Json
+- src/__Tests/__Libraries/StellaOps.Testing.Determinism
+
+## Required reading
+- docs/README.md
+- docs/07_HIGH_LEVEL_ARCHITECTURE.md
+- docs/modules/platform/architecture-overview.md
+- docs/modules/cli/contracts/output-determinism.md
+
+## Determinism and test rules
+- Use deterministic inputs; avoid DateTime.UtcNow, DateTimeOffset.UtcNow, Guid.NewGuid, and Random.Shared in tests.
+- Use TimeProvider and fixed seeds or fixtures for time- and randomness-dependent tests.
+- Use CultureInfo.InvariantCulture for parsing and formatting in tests.
+- Tag tests with TestCategories (Unit, Integration, Performance) and keep integration tests out of unit-only runs.
+
+## Quality and safety
+- ASCII-only strings and comments unless explicitly justified.
+- Keep fixtures small and deterministic; clean up temp resources.

src/__Libraries/__Tests/StellaOps.TestKit.Tests/DeterminismManifestTests.cs

@@ -1,3 +1,4 @@
+using System.Text.Json;
 using FluentAssertions;
 using StellaOps.Canonical.Json;
 using StellaOps.Testing.Determinism;
@@ -132,7 +133,7 @@ public sealed class DeterminismManifestTests
     {
         // Arrange
         var manifest = CreateSampleManifest() with { SchemaVersion = "2.0" };
-        var bytes = DeterminismManifestWriter.ToCanonicalBytes(manifest);
+        var bytes = JsonSerializer.SerializeToUtf8Bytes(manifest);
 
         // Act
         Action act = () => DeterminismManifestReader.FromBytes(bytes);

src/__Libraries/__Tests/StellaOps.TestKit.Tests/TASKS.md

@@ -0,0 +1,10 @@
+# StellaOps.TestKit.Tests Task Board
+
+This board mirrors active sprint tasks for this module.
+Source of truth: `docs/implplan/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`.
+
+| Task ID | Status | Notes |
+| --- | --- | --- |
+| AUDIT-0041-M | DONE | Revalidated 2026-01-08; open findings tracked in audit report. |
+| AUDIT-0041-T | DONE | Revalidated 2026-01-08; open findings tracked in audit report. |
+| AUDIT-0041-A | DONE | Waived (test project; revalidated 2026-01-08). |