audit work

src/Cryptography/StellaOps.Cryptography.Profiles.Ecdsa/AGENTS.md

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+# ECDSA Profile Charter
+
+## Mission
+Provide the ECDSA P-256 signing profile for StellaOps signatures.
+
+## Responsibilities
+- Keep key handling and signature metadata deterministic where possible.
+- Enforce key size and algorithm expectations.
+- 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. Prefer injectable time providers for signature timestamps.
+- 3. Add tests for sign/verify and public key export.

src/Cryptography/StellaOps.Cryptography.Profiles.Ecdsa/TASKS.md

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+# ECDSA Profile 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-0268-M | DONE | Maintainability audit for StellaOps.Cryptography.Profiles.Ecdsa. |
+| AUDIT-0268-T | DONE | Test coverage audit for StellaOps.Cryptography.Profiles.Ecdsa. |
+| AUDIT-0268-A | TODO | Pending approval for changes. |