Unified DICOM toolkit with CLIs and utilities implemented in Python, Rust, C++, C#, Java, and JS, plus a shared UI and contract runner. Each folder hosts its own backend; sample_series/ in the repo root provides the reference datasets used across tests and demos.

• C++: DCMTK, GDCM, ITK, VTK
• Python: pydicom, pynetdicom, python-gdcm, SimpleITK, dicom-numpy
• Rust: dicom-rs stack
• C#: fo-dicom
• Java: dcm4che (dcm4che3)
• JS: Cornerstone3D (gateway) + Node contract shim

• python/ — 20+ CLI commands (info, anonymize, to-image, validate, transcode, volume/NIfTI, PACS echo/query/retrieve). Install: pip install -e python (or pip install -r python/requirements.txt). Tests: cd python && pytest -q. Optional extras: gdcm, SimpleITK, dicom-numpy.
• rust/ — CLI/Web built on dicom-rs (inspect, anonymize, multi-frame to-image, JSON round-trip, validate, transcode, histogram, dump, experimental echo/push/find). Commands: cargo build, cargo test, cargo fmt --all, cargo clippy --all-targets --all-features. Examples: cargo run -- info file.dcm, cargo run -- to-image file.dcm --format png, cargo run -- web --host 127.0.0.1 --port 3000.
• cpp/ — DicomTools executable with GDCM/DCMTK/ITK/VTK modules (anonymize, J2K/RLE/JPEG-LS transcode, dump, stats, MPR, volume rendering, NIfTI/NRRD, SR/RT). Prereqs: CMake 3.15+, C++17 compiler; optional ./scripts/build_deps.sh to build DCMTK/GDCM/ITK/VTK locally. Build: cmake -S . -B build && cmake --build build. Usage: ./build/DicomTools --modules, ./build/DicomTools all -i input/dcm_series/IM-0001-0190.dcm -o output. Tests: python3 tests/run_all.py.
• cs/ — fo-dicom CLI (.NET 8) with info/anonymize/to-image/transcode/validate/echo/dump/stats/histogram; xUnit tests cover networking and codecs. Build: dotnet build DicomTools.sln (or only DicomTools.Cli). Tests: dotnet test cs/DicomTools.Tests/DicomTools.Tests.csproj (set DOTNET_ROLL_FORWARD=Major if only .NET 10 is installed). CLI: dotnet cs/bin/Debug/net8.0/DicomTools.Cli.dll --help.
• java/ — dcm4che-tests (Java 17, Maven) with CLI and JUnit suite (info, anonymize, to_image, transcode, validate, dump, stats, echo). Commands: cd java/dcm4che-tests && mvn test or mvn package to create target/dcm4che-tests.jar (main com.dicomtools.cli.DicomToolsCli). Example: java -jar dcm4che-tests/target/dcm4che-tests.jar --op info --input ../../sample_series/IM-0001-0001.dcm.
• js/ — JS layer with viewer-gateway/ (Vite + Cornerstone3D, Vitest) and contract-cli/ (Node shim for the contract; defaults to the Python backend). Prereq: Node 18+. Commands: cd js/viewer-gateway && npm install && npm run dev|build|test. Contract CLI: node js/contract-cli/index.js --op info --input sample_series/IM-0001-0001.dcm --options "{}" (override BACKING_CMD to point elsewhere).
• interface/ — Tkinter UI and headless contract executor; adapters target every backend. Launch UI: python -m interface.app. Headless: python -m interface.contract_runner --backend python --op info --input sample_series/IM-0001-0001.dcm. Tests: cd interface && pytest.

• sample_series/ contains the DICOM files used across tests and quickstarts. Most commands/tests assume paths relative to the repo root.

• Script: ./scripts/setup_all.sh
• Installs/Builds: Python editable install (with dev requirements), Rust release, C++ build (cpp/build), C# solution restore/build, Java Maven package, JS deps (viewer-gateway).
• Requires tools on PATH: python3, pip, cargo, cmake, .NET SDK 8+ (dotnet), mvn, npm. Set BUILD_TYPE=Debug to change the C++ config.

• Python: cd python && pytest -q
• Rust: cd rust && cargo test
• C++: python3 cpp/tests/run_all.py (or ctest after configuring cpp/build)
• C#: dotnet test cs/DicomTools.Tests/DicomTools.Tests.csproj
• Java: cd java/dcm4che-tests && mvn test
• JS (viewer-gateway): cd js/viewer-gateway && npm test
• Interface: cd interface && pytest

All CLIs follow the shared contract in interface/CONTRACT.md. The Node shim (js/contract-cli) and the Tkinter adapters point to the corresponding binaries and can be redirected via environment variables.