Add DocxodusEngine as a second comparison engine

.github/workflows/ci.yml

@@ -0,0 +1,75 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.9', '3.11', '3.12']
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Set up .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '8.0.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install hatch
+
+    - name: Build engine binaries
+      run: python build_differ.py
+
+    - name: Run tests
+      run: hatch run test
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+
+    - name: Set up .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '8.0.x'
+
+    - name: Install build dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install hatch hatchling
+
+    - name: Build package
+      run: hatch build
+
+    - name: Check package
+      run: |
+        pip install twine
+        twine check dist/*

.github/workflows/python-publish.yml

@@ -14,10 +14,16 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+      with:
+        submodules: recursive
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
         python-version: '3.x'
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: '8.0.x'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
@@ -26,4 +32,4 @@ jobs:
       run: hatch build
     - name: Publish package
       run: |
-        hatch publish -u "__token__" -a ${{ secrets.PYPI_API_TOKEN }}
+        hatch publish -u "__token__" -a ${{ secrets.PYPI_API_TOKEN }}

.gitignore

@@ -6,6 +6,8 @@ __pycache__/
 # C# Build Dirs
 csproj/bin/*
 csproj/obj/*
+docxodus/**/bin/*
+docxodus/**/obj/*
 
 # C extensions
 *.so

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "docxodus"]
+	path = docxodus
+	url = https://github.com/JSv4/Docxodus.git

CLAUDE.md

@@ -0,0 +1,73 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Python-Redlines is a Python wrapper around compiled C# binaries that generate `.docx` redline/tracked-changes documents by comparing two Word files. The Python layer handles platform detection, binary extraction, temp file management, and subprocess execution.
+
+Two comparison engines are available:
+- **XmlPowerToolsEngine** — wraps Open-XML-PowerTools WmlComparer (original engine)
+- **DocxodusEngine** — wraps Docxodus, a modernized .NET 8.0 fork with better move detection
+
+## Commands
+
+```bash
+# Run tests
+hatch run test
+
+# Run a single test
+hatch run test tests/test_openxml_differ.py::test_run_redlines_with_real_files
+
+# Run tests with coverage
+hatch run cov
+
+# Type checking
+hatch run types:check
+
+# Build C# binaries for all platforms (requires .NET 8.0 SDK)
+hatch run build
+
+# Build Python package (triggers C# build via custom hook)
+hatch build
+
+# Initialize Docxodus submodule (required before building)
+git submodule update --init --recursive
+```
+
+## Architecture
+
+The system uses a two-layer wrapper pattern with a shared base class:
+
+1. **Python layer** (`src/python_redlines/engines.py`):
+   - `BaseEngine` — shared logic for binary extraction, subprocess invocation, and temp file management
+   - `XmlPowerToolsEngine(BaseEngine)` — sets constants for the Open-XML-PowerTools binary (`dist/`, `bin/`, `redlines`)
+   - `DocxodusEngine(BaseEngine)` — sets constants for the Docxodus binary (`dist_docxodus/`, `bin_docxodus/`, `redline`)
+
+   Both engines expose `run_redline(author_tag, original, modified, **kwargs)`. `DocxodusEngine` overrides `_build_command()` to translate kwargs (e.g. `detect_moves`, `detail_threshold`) into CLI flags for the Docxodus binary. `XmlPowerToolsEngine` uses the legacy 4-positional-arg format and ignores kwargs.
+
+2. **C# binaries**:
+   - `csproj/Program.cs` — Open-XML-PowerTools CLI tool
+   - `docxodus/tools/redline/Program.cs` — Docxodus CLI tool (git submodule)
+
+Pre-compiled binaries for 6 platform targets (linux/win/osx x x64/arm64) are stored as archives in `src/python_redlines/dist/` and `src/python_redlines/dist_docxodus/`, included in the wheel. The build script `build_differ.py` compiles both engines using `dotnet publish`.
+
+## Key Files
+
+- `src/python_redlines/engines.py` — BaseEngine, XmlPowerToolsEngine, and DocxodusEngine classes
+- `src/python_redlines/__init__.py` — Exports all engine classes
+- `src/python_redlines/__about__.py` — Single source of truth for package version
+- `csproj/Program.cs` — Open-XML-PowerTools C# comparison utility
+- `docxodus/` — Docxodus git submodule (tools/redline/ contains the CLI)
+- `build_differ.py` — Cross-platform C# build orchestration for both engines
+- `hatch_run_build_hook.py` — Hatch build hook that triggers C# compilation
+- `tests/fixtures/` — Test `.docx` files (original, modified, expected_redline)
+
+## Testing Notes
+
+Tests must be run from the project root (fixtures use relative paths like `tests/fixtures/original.docx`). The XmlPowerToolsEngine integration test validates that comparing the fixture documents produces exactly 9 revisions. Docxodus uses a different stdout format (`"revision(s) found"` vs `"Revisions found: 9"`).
+
+## Stdout Format Differences
+
+- **XmlPowerToolsEngine**: `"Revisions found: 9"`
+- **DocxodusEngine**: `"Redline complete: 9 revision(s) found"`