Tests fixes, audit progress, UI completions

src/Attestor/__Libraries/__Tests/StellaOps.Attestor.GraphRoot.Tests/AGENTS.md

@@ -0,0 +1,21 @@
+# Attestor GraphRoot Tests AGENTS
+
+## Purpose & Scope
+- Working directory: `src/Attestor/__Libraries/__Tests/StellaOps.Attestor.GraphRoot.Tests/`.
+- Roles: QA automation, backend engineer.
+- Focus: graph root attestation, Merkle root computation, DSSE envelope signing/verification.
+
+## Required Reading (treat as read before DOING)
+- `docs/README.md`
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/attestor/architecture.md`
+- `docs/modules/platform/architecture-overview.md`
+- Relevant sprint files.
+
+## Working Agreements
+- Keep tests deterministic: fixed IDs and predictable fixtures.
+- Classify integration tests accurately (Unit vs Integration).
+- Add negative-path tests for malformed inputs and signature failures.
+
+## Testing
+- Cover DSSE PAE signing, signature verification, Rekor submission behavior, and tamper detection.

src/Attestor/__Libraries/__Tests/StellaOps.Attestor.GraphRoot.Tests/TASKS.md

@@ -0,0 +1,10 @@
+# Attestor GraphRoot 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-0054-M | DONE | Maintainability audit for StellaOps.Attestor.GraphRoot.Tests. |
+| AUDIT-0054-T | DONE | Test coverage audit for StellaOps.Attestor.GraphRoot.Tests. |
+| AUDIT-0054-A | TODO | Pending approval for changes. |