Initial project snapshot

workers/rdp-service-csharp/README.md

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+# RAP RDP Service C# Skeleton
+
+This directory contains an inactive C# RDP service research scaffold.
+
+Status: inactive research scaffold. It is not wired into the runtime stack and
+does not replace the current C++ worker.
+
+## Purpose
+
+The current C++ worker remains the active RDP runtime. The active performance
+direction is C++ RDP service internals, documented in:
+
+- `docs/architecture/RDP_SERVICE_CPP_PERFORMANCE_TARGET.md`
+
+This C# scaffold is retained only as non-runtime research context. It must not
+be used for implementation unless explicitly re-approved.
+
+Any future alternative service would still need to keep:
+
+- backend control-plane contracts
+- worker lease/assignment model
+- direct worker WSS data-plane contract
+- fallback backend gateway
+- session lifecycle semantics
+
+## Rules
+
+- No FreeRDP dependency in this service.
+- No third-party RDP protocol library.
+- RDP protocol details stay behind service boundaries.
+- Cluster transport is not redesigned here.
+- Current C++ worker remains the active and intended runtime direction.
+- Do not continue this C# scaffold unless explicitly re-approved.
+
+## Build
+
+```powershell
+dotnet build workers/rdp-service-csharp/src/Rap.Rdp.Service/Rap.Rdp.Service.csproj
+```
+
+## Current Limitations
+
+- No RDP handshake yet.
+- No NLA/CredSSP yet.
+- No graphics protocol implementation yet.
+- No direct WSS binding yet.
+- No worker registration yet.
+
+See:
+
+- `docs/architecture/RDP_SERVICE_CPP_PERFORMANCE_TARGET.md`
+- `docs/architecture/RDP_SERVICE_CSHARP_TARGET.md` for superseded historical context