more audit work

src/__Libraries/StellaOps.Provenance/AGENTS.md

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+# Provenance Core Library Charter
+
+## Mission
+- Provide lightweight provenance metadata helpers and parsers used by upstream modules.
+
+## Responsibilities
+- Keep provenance parsing deterministic and culture-invariant.
+- Minimize dependencies and avoid unnecessary coupling to other modules.
+- Preserve stable document shapes for DSSE/provenance metadata and query filters.
+
+## Required Reading
+- docs/modules/provenance/architecture.md
+- docs/modules/platform/architecture-overview.md
+
+## Working Directory & Scope
+- Primary: src/__Libraries/StellaOps.Provenance
+
+## Testing Expectations
+- Unit tests for ProvenanceJsonParser parsing/validation paths.
+- Unit tests for DocumentStubs conversions and filter builders.
+- Determinism checks for numeric parsing and string formatting.
+
+## Working Agreement
+- Update sprint status in docs/implplan/SPRINT_*.md and local TASKS.md.
+- Keep outputs deterministic and ASCII-only in comments and logs.

src/__Libraries/StellaOps.Provenance/TASKS.md

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+# Provenance Core 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-0102-M | DONE | Revalidated 2026-01-08; maintainability audit for Provenance core. |
+| AUDIT-0102-T | DONE | Revalidated 2026-01-08; test coverage audit for Provenance core. |
+| AUDIT-0102-A | TODO | Pending approval (revalidated 2026-01-08). |