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>

.github/workflows/rust.yml

@@ -0,0 +1,49 @@
+name: rust
+
+on:
+  push:
+    branches: [master, main]
+    paths: ['rust/**', '.github/workflows/rust.yml']
+  pull_request:
+    paths: ['rust/**', '.github/workflows/rust.yml']
+
+defaults:
+  run:
+    shell: pwsh
+    working-directory: rust
+
+jobs:
+  build:
+    name: build / test / clippy / fmt
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: '1.85'
+          components: rustfmt, clippy
+
+      - name: Cache cargo
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: rust
+
+      - name: cargo fmt --check
+        run: cargo fmt --all -- --check
+
+      - name: cargo build --workspace
+        run: cargo build --workspace --all-targets
+
+      - name: cargo test --workspace
+        run: cargo test --workspace --no-fail-fast
+        env:
+          # MX_LIVE is intentionally NOT set — live tests require an AVEVA
+          # install + Galaxy DB which CI cannot provide. See design/60-roadmap.md
+          # validation strategy: live probes run on the maintainer's workstation,
+          # gated by `MX_LIVE=1` via `tools/Setup-LiveProbeEnv.ps1`.
+          MX_LIVE: ''
+
+      - name: cargo clippy --workspace -- -D warnings
+        run: cargo clippy --workspace --all-targets -- -D warnings