more audit work

src/__Tests/Determinism/AGENTS.md

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+# Determinism Tests Charter
+
+## Mission
+Validate CGS determinism and cross-platform hash stability.
+
+## Responsibilities
+- Maintain determinism tests for VerdictBuilder and CGS hashing.
+- Keep fixtures deterministic and offline-friendly.
+- Track sprint tasks in `TASKS.md` and update the sprint tracker.
+
+## Key Paths
+- `CgsDeterminismTests.cs`
+- `README.md`
+
+## Required Reading
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/platform/architecture-overview.md`
+- `docs/implplan/permament/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`
+
+## Working Agreement
+- 1. Use fixed time and IDs; avoid Guid.NewGuid or DateTimeOffset.UtcNow in fixtures.
+- 2. Keep evidence JSON deterministic and aligned with canonicalization rules.
+- 3. Update `TASKS.md` and sprint statuses when work changes.

src/__Tests/Determinism/TASKS.md

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+# Determinism Tests Task Board
+
+This board mirrors active sprint tasks for this module.
+Source of truth: `docs/implplan/permament/SPRINT_20251229_049_BE_csproj_audit_maint_tests.md`.
+
+| Task ID | Status | Notes |
+| --- | --- | --- |
+| AUDIT-0787-M | DONE | Revalidated 2026-01-07. |
+| AUDIT-0787-T | DONE | Revalidated 2026-01-07. |
+| AUDIT-0787-A | DONE | Waived (test project; revalidated 2026-01-07). |