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src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Client/AGENTS.md

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+# ExportCenter Client Agent Charter
+
+## Mission
+Provide a stable, offline-friendly SDK client for the ExportCenter WebService API.
+
+## Responsibilities
+- Maintain typed API calls, pagination/query handling, and error envelopes.
+- Keep streaming download helpers deterministic and safe (atomic writes, checksum validation).
+- Ensure configuration options map cleanly to HttpClient behavior.
+
+## Required Reading
+- docs/modules/export-center/architecture.md
+- docs/modules/export-center/provenance-and-signing.md
+- docs/modules/platform/architecture-overview.md
+
+## Definition of Done
+- Client surface matches API contracts and uses deterministic defaults.
+- Downloads avoid partial files and support offline usage.
+
+## Working Agreement
+- 1. Update task status to DOING/DONE in the sprint file and local TASKS.md.
+- 2. Review this charter and required docs before coding.
+- 3. Keep outputs deterministic and avoid network side effects in tests.
+- 4. Prefer invariant culture for parsing/formatting in URLs and logs.
+- 5. Revert to TODO if paused; capture context in PR notes.

src/ExportCenter/StellaOps.ExportCenter/StellaOps.ExportCenter.Client/TASKS.md

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+# ExportCenter Client 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-0331-M | DONE | Maintainability audit for ExportCenter.Client. |
+| AUDIT-0331-T | DONE | Test coverage audit for ExportCenter.Client. |
+| AUDIT-0331-A | TODO | Pending approval (non-test project). |