audit work

src/__Libraries/StellaOps.Cryptography.Plugin.SmSoft/AGENTS.md

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+# SM Soft Crypto Plugin Charter
+
+## Mission
+Provide software-only SM2/SM3 signing and hashing for StellaOps cryptography.
+
+## Responsibilities
+- Keep key handling deterministic and explicit.
+- Gate software SM usage via environment controls.
+- Avoid exposing private key material.
+- Track task status in `TASKS.md`.
+
+## Required Reading
+- `docs/modules/platform/architecture-overview.md`
+
+## Working Agreement
+- 1. Update task status in the sprint file and local `TASKS.md`.
+- 2. Validate key options and algorithm IDs explicitly.
+- 3. Add tests for env gate behavior and key-loading error paths.

src/__Libraries/StellaOps.Cryptography.Plugin.SmSoft/TASKS.md

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+# SM Soft Crypto Plugin 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-0263-M | DONE | Maintainability audit for StellaOps.Cryptography.Plugin.SmSoft. |
+| AUDIT-0263-T | DONE | Test coverage audit for StellaOps.Cryptography.Plugin.SmSoft. |
+| AUDIT-0263-A | TODO | Pending approval for changes. |