Initial project state: .NET reference, design, Rust port (M0+M1), evidence

Layout:
- src/                    .NET 10 x64 reference: MxNativeCodec, MxNativeClient,
                          MxAsbClient, probes, tests, harnesses. Executable spec.
- design/                 Architectural plan for the Rust port (M0–M6), error
                          model, protocol invariants, risks (R1–R16), adversarial
                          review log (review.md).
- rust/                   Rust workspace. M0 skeleton + M1 codec parity.
                          mxaccess-codec: 215 unit tests + 2 cross-implementation
                          parity tests (byte-identical against .NET reference).
                          Other crates are M0 stubs awaiting M2+.
- captures/               Frida + netsh + pcap evidence per CLAUDE.md
                          ("captures are evidence, not throwaway logs").
- analysis/               Decompiled C# (frida/proxy/decompiled-*),
                          Ghidra exports for native DLLs (`exports/` only —
                          working state at `projects/` and AVEVA's input
                          binaries at `input/` are gitignored).
- docs/                   Reverse-engineering reference docs.
- tools/                  Setup-LiveProbeEnv.ps1 (Infisical credential fetcher),
                          Compute-Crc.ps1 (.NET parity helper).
- .github/workflows/      Rust CI: fmt + build + test + clippy on Windows.
- LICENSE                 MIT (Joseph Doherty, 2026).

Verified:
- cargo test --workspace → 217 passed (215 unit + 2 .NET parity), 0 failed
- cargo clippy --workspace -- -D warnings → clean
- cargo fmt --all -- --check → clean
- cargo publish --dry-run -p mxaccess-codec → packages cleanly

Excluded from history (see .gitignore):
- **/bin, **/obj, **/target — build artifacts
- analysis/ghidra/projects/ — Ghidra working state (regenerable)
- analysis/ghidra/input/ — AVEVA proprietary DLLs (vendor IP)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

analysis/decompiled-interop/Interop.NmxAdptr/Interop/NmxAdptr/IMxSystemConnection3.cs

@@ -0,0 +1,65 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Interop.NmxAdptr;
+
+[ComImport]
+[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+[Guid("95EBDC41-C2F7-48AA-B0A0-B3577E165905")]
+public interface IMxSystemConnection3 : IMxSystemConnection2
+{
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new int SystemRegisterReference([In][MarshalAs(UnmanagedType.Interface)] MxReference pMxReference, [In] bool subscribe);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new void SystemUnregisterReference([In] int hRef);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	new MxValue SystemGetAttribute([In] int hRef, out short pMxDataQuality, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	new MxValue SystemGetAttributeBlocking([In] int hRef, out short pMxDataQuality, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new void SystemSetAttribute([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValueIn, [In][MarshalAs(UnmanagedType.Interface)] IMxCallback pMxCallback);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new void SystemSetAttributeGuaranteed([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValue);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	new MxValue SystemSetAttributeBlocking([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValueIn, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.BStr)]
+	new string SystemGetQualityDescription([In] ref short mxDataQuality);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new void SystemSetResponse([In] int callbackId, [In] ref MxStatus pMxStatus);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	new void SystemSetAttribute2([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValueIn, [In][MarshalAs(UnmanagedType.Interface)] IMxCallback pMxCallback, [In] byte msgPriority);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	MxValue SystemGetAttribute3([In] int hRef, out short pMxDataQuality, out _FILETIME pMxTime, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	void SystemSetAttribute3([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValueIn, [In] short Quality, [In] _FILETIME Timestamp, [In][MarshalAs(UnmanagedType.Interface)] IMxCallback pMxCallback, [In] byte msgPriority = 0);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	MxValue SystemGetAttributeBlocking3([In] int hRef, out short pMxDataQuality, out _FILETIME pMxTime, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	void SystemSetAttributeGuaranteed3([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValue, [In] short Quality, [In] _FILETIME Timestamp);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	[return: MarshalAs(UnmanagedType.Interface)]
+	MxValue SystemSetAttributeBlocking3([In] int hRef, [In][MarshalAs(UnmanagedType.Interface)] MxValue pMxValueIn, [In] short QualityIn, [In] _FILETIME TimestampIn, out MxStatus pMxStatus, [MarshalAs(UnmanagedType.BStr)] out string pStatusDescription, out short pMxDataQualityOut, out _FILETIME pMxTimeOut);
+
+	[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
+	void SystemGetAttributesSupportedProperties([In] int hRef, out int SupportedProperties, out MxStatus pMxStatus);
+}