ONNX v1.19.0 is now available with exciting new features! We would like to thank everyone who contributed to this release! Please visit onnx.ai to learn more about ONNX and associated projects.

Key Updates

IR Version 12

• Added FLOAT8E8M0 type

ai.onnx Opset 24

• Added Swish op
• Added TensorScatter op and updated Attention op for in-place KV cache updates
• Enabled FLOAT8E8M0 for QuantizeLinear, DequantizeLinear, Cast, CastLike, Constant, ConstantOfShape, Identity, Reshape, Shape, Size, If, Loop, Scan, Flatten, Pad, Squeeze, Unsqueeze, and Transpose.
• Enabled BF16 for TopK and SplitToSequence.
• Other
• Added dependency on ml-dtypes
• BUILD_ONNX_PYTHON symbol is deprecated (we be removed for 1.20). Please, use ONNX_BUILD_PYTHON instead.

What's Changed

Breaking Changes and Deprecations

• Deprecate printable_graph in helper by @justinchuby in https://github.com/onnx/onnx/pull/6803
• Remove deprecated mapping constants by @justinchuby in https://github.com/onnx/onnx/pull/6914
• Remove re2 dependency by @cbourjau in https://github.com/onnx/onnx/pull/7083
• Use ml_dtypes everywhere by @justinchuby in https://github.com/onnx/onnx/pull/7089

Spec and Operator

• Clarify the axes input of [un]Squeeze to be 1D tensors by @justinchuby in https://github.com/onnx/onnx/pull/6888
• Clarify that variable shadowing is not allowed by @justinchuby in https://github.com/onnx/onnx/pull/6955
• Clarify Mod operator by @cbourjau in https://github.com/onnx/onnx/pull/6973
• Fix typo regarding Attention scale in the spec by @yuanyao-nv in https://github.com/onnx/onnx/pull/6984
• Clarify default value for ratio input of Dropout operator by @robertknight in https://github.com/onnx/onnx/pull/7032
• Correct dtype attribute docs for EyeLike operator by @robertknight in https://github.com/onnx/onnx/pull/7031
• Update float8 table for the Cast op spec by @justinchuby in https://github.com/onnx/onnx/pull/7085
• Document Multi-Device Configuration proto specifications in IR.md by @Copilot in https://github.com/onnx/onnx/pull/7056
• Add FLOAT8E8M0 data type by @yuanyao-nv in https://github.com/onnx/onnx/pull/7030
• Enable float8e8m0 for Q/DQ, and other ops by @yuanyao-nv in https://github.com/onnx/onnx/pull/7120
• Update the saturating behavior for E4M3FNUZ/E5M2FNUZ in Cast and CastLike by @justinchuby in https://github.com/onnx/onnx/pull/7130
• Fix ELU and Softplus operators to support tensors of any shape by @Copilot in https://github.com/onnx/onnx/pull/7136
• Fix Shape operator specification: correct range bounds and document start > end behavior by @Copilot in https://github.com/onnx/onnx/pull/7132
• Fix Attention 3D, reference implementation and c++ expansion by @xadupre in https://github.com/onnx/onnx/pull/7142
• Fix RMS norm function definition by @justinchuby in https://github.com/onnx/onnx/pull/7135
• Fix spec for ReduceSumSquare and other reduce ops when noop_with_empty_axes is set by @Copilot in https://github.com/onnx/onnx/pull/7137
• Add bf16 support to TopK and SplitToSequence by @gramalingam in https://github.com/onnx/onnx/pull/7158
• Add Swish operator by @isdanni in https://github.com/onnx/onnx/pull/7172
• Add TensorScatter op for in-place kv cache update by @yuanyao-nv in https://github.com/onnx/onnx/pull/7114
• Fix Resize operator document by @kcvlex in https://github.com/onnx/onnx/pull/6686

Reference Implementation

• Fix Resize reference operator by @xadupre in https://github.com/onnx/onnx/pull/7105
• fixed erf for empty inputs by @konstantin-pueckler-qc in https://github.com/onnx/onnx/pull/7170
• Fix Softmax reference for inputs of length 1 by @konstantin-pueckler-qc in https://github.com/onnx/onnx/pull/7169
• Fix return type of HardSigmoid in reference implementation by @konstantin-pueckler-qc in https://github.com/onnx/onnx/pull/7168
• Fix hardmax reference implementation by @konstantin-pueckler-qc in https://github.com/onnx/onnx/pull/7167
• [Reference] Fix constant of shape when input value is 0d by @justinchuby in https://github.com/onnx/onnx/pull/7177

Utilities and Tools

• Support set schema inference function in python by @OYCN in https://github.com/onnx/onnx/pull/5940
• Improve model Extractor by @justinchuby in https://github.com/onnx/onnx/pull/6920
• Fix: prefixing of graphs when rename_inputs=False/rename_outputs=False by @KarelZe in https://github.com/onnx/onnx/pull/6994
• Fix Einsum shape inference segfault for scalar inputs by @Copilot in https://github.com/onnx/onnx/pull/7055
• Add support for constructing functions with graph attributes by @Copilot in https://github.com/onnx/onnx/pull/7112
• Make some op-level shape inference functions public by @titaiwangms in https://github.com/onnx/onnx/pull/7091
• Implement saturate_cast in numpy helper by @justinchuby in https://github.com/onnx/onnx/pull/7143
• Add .txtpb as a support text proto format in serialization by @justinchuby in https://github.com/onnx/onnx/pull/7161

Build, CI and Tests

• Use ONNX_WERROR=ON in all jobs by @cyyever in https://github.com/onnx/onnx/pull/6825
• Cleanup CMake scripts by @cyyever in https://github.com/onnx/onnx/pull/6828
• Better support of sanitizers by @cyyever in https://github.com/onnx/onnx/pull/6826
• Remove the pull trigger in source dist test by @justinchuby in https://github.com/onnx/onnx/pull/6861
• Use CONFIG to find protobuf by @ktf in https://github.com/onnx/onnx/pull/6840
• Update to checkout submodules properly by @justinchuby in https://github.com/onnx/onnx/pull/6884
• Improve lint CI by @justinchuby in https://github.com/onnx/onnx/pull/6899
• Remove win arm64 from main.yml by @andife in https://github.com/onnx/onnx/pull/6906
• Enhance Build Process and CI Configuration (combine pipelines) by @andife in https://github.com/onnx/onnx/pull/6926
• Update and rename Install_test.yml to install_test.yml by @andife in https://github.com/onnx/onnx/pull/6950
• Update CMake to 3.24 and use LINK_LIBRARY:WHOLE_ARCHIVE by @cyyever in https://github.com/onnx/onnx/pull/6934
• replace requirements_release with requirements_release_build in codeql.yml by @andife in https://github.com/onnx/onnx/pull/6958
• Add backend node testing for Lpnormalization op by @jagadeeshvx in https://github.com/onnx/onnx/pull/6997
• Refine pybind11 integration by @cyyever in https://github.com/onnx/onnx/pull/7024
• Use pybind11_add_module by @cyyever in https://github.com/onnx/onnx/pull/7034
• Update input and output tensors in pb files to match the model by @amarin16 in https://github.com/onnx/onnx/pull/7074
• Generate the test data that should be in the repo but was omitted by @justinchuby in https://github.com/onnx/onnx/pull/7099
• Fix cast test cases by @justinchuby in https://github.com/onnx/onnx/pull/7102
• Test ArgMax with multiple maximal values and select_last_index = 0 by @meilofveeningen-rl in https://github.com/onnx/onnx/pull/7104
• Add more test cases with attention by @xadupre in https://github.com/onnx/onnx/pull/7117
• Update CMakeLists.txt to prevent ICE protobuf failure by @justinchuby in https://github.com/onnx/onnx/pull/7121
• Fix shared module name when cross-compiling by @zboszor in https://github.com/onnx/onnx/pull/7026
• Add missing symbols for onnx-mlir by @Sunny-Anand in https://github.com/onnx/onnx/pull/7179
• improve condition in create_release.yml by @andife in https://github.com/onnx/onnx/pull/7196

Documentation

• Update CIPipelines.md by @justinchuby in https://github.com/onnx/onnx/pull/6885
• Update IRv10 brief docs by @justinchuby in https://github.com/onnx/onnx/pull/6963
• Fix some typos in documentation by @bentheiii in https://github.com/onnx/onnx/pull/7156
• [Docs] Add tip blocks referencing ir-py project for Python APIs by @Copilot in https://github.com/onnx/onnx/pull/7109

Other Changes

• Merge Windows CI jobs by @cyyever in https://github.com/onnx/onnx/pull/6827
• Improve source build testing by @andife in https://github.com/onnx/onnx/pull/6831
• use HEAD_SHA instead of HEAD_REF in auto_update_doc.yml by @mshudrak in https://github.com/onnx/onnx/pull/6809
• Fix clang-tidy warnings by @cyyever in https://github.com/onnx/onnx/pull/6832
• Update pypa / manylinux2014_x86_64 in release_linux_x86_64.yml to 2025.03.22-2 by @andife in https://github.com/onnx/onnx/pull/6833
• Fix the ONNX_BUILD_CUSTOM_PROTOBUF bug introduced by PR#6495. by @cainbit in https://github.com/onnx/onnx/pull/6830
• Bump protobuf to v30.1 by @cyyever in https://github.com/onnx/onnx/pull/6804
• Remove onnx/onnx-data_pb.h by @cyyever in https://github.com/onnx/onnx/pull/6836
• replace quansight-labs/setup-python with actions/setup-python by @ngoldbaum in https://github.com/onnx/onnx/pull/6837
• integrate release_mac_freethreading into release_mac by @andife in https://github.com/onnx/onnx/pull/6841
• Bump protobuf to v30.2 by @cyyever in https://github.com/onnx/onnx/pull/6839
• Improve pyproject.toml and add py.typed by @cyyever in https://github.com/onnx/onnx/pull/6843
• Bump ruff to 0.11 and types-protobuf to 5.29.1.20250315 by @cyyever in https://github.com/onnx/onnx/pull/6846
• Bump actions/setup-python from 5.4.0 to 5.5.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6853
• Bump actions/upload-artifact from 4.6.1 to 4.6.2 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6852
• Bump actions/download-artifact from 4.1.9 to 4.2.1 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6856
• Bump clang-format to 20 by @cyyever in https://github.com/onnx/onnx/pull/6850
• Fix external data bug in version converter by @yuanyao-nv in https://github.com/onnx/onnx/pull/6847
• Bump github/codeql-action from 3.28.11 to 3.28.13 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6858
• Bump editorconfig-checker from 3.2.0 to 3.2.1 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6860
• Bump reviewdog/action-misspell from 1.26.1 to 1.26.3 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6857
• Bump reviewdog/action-shellcheck from 1.29.0 to 1.30.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6854
• Added selection option to enable both release and preview builds in the create_release.yml workflow by @andife in https://github.com/onnx/onnx/pull/6851
• Add Publishing Workflow for onnx to Test PyPI (https://test.pypi.org/project/onnx/) by @andife in https://github.com/onnx/onnx/pull/6849
• Bump reviewdog/action-cpplint from 1.8.0 to 1.9.2 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6855
• Remove pyi generators by @yadunand-kamath in https://github.com/onnx/onnx/pull/6863
• Update win_no_exception_ci.yml by @andife in https://github.com/onnx/onnx/pull/6872
• remove not used condition in preview_source_dist_test.yml by @andife in https://github.com/onnx/onnx/pull/6873
• Update OnnxReleases.md by @andife in https://github.com/onnx/onnx/pull/6871
• Remove ipython, twine from requirements*.txt by @andife in https://github.com/onnx/onnx/pull/6874
• Update release_linux_aarch64.yml by @andife in https://github.com/onnx/onnx/pull/6876
• Update and rename release_win.yml to release_win_x86_64.yml by @andife in https://github.com/onnx/onnx/pull/6875
• remove jupyter from requirements-dev.txt by @andife in https://github.com/onnx/onnx/pull/6878
• Remove outdated comments in clang-tidy config by @cyyever in https://github.com/onnx/onnx/pull/6882
• Use std::filesystem to simplify code by @cyyever in https://github.com/onnx/onnx/pull/6402
• Add support for Free-Threading in Linux Wheel Builds by @andife in https://github.com/onnx/onnx/pull/6835
• Integrate freethreading parts from separate file into main by @andife in https://github.com/onnx/onnx/pull/6889
• Update VERSION_NUMBER to 1.19 by @andife in https://github.com/onnx/onnx/pull/6890
• Update versioning in the main branch after release branch cut by @andife in https://github.com/onnx/onnx/pull/6892
• Link privately to protobuf static libraries by @cyyever in https://github.com/onnx/onnx/pull/6881
• Update release_linux_aarch64 to include 3.13t by @andife in https://github.com/onnx/onnx/pull/6893
• Remove nbval dependency, replaces [#6896] by @xadupre in https://github.com/onnx/onnx/pull/6897
• Consolidate Freethreading Requirements into Main Requirements Files for Enhanced Tooling by @cyyever in https://github.com/onnx/onnx/pull/6844
• Delete pyproject_pylint.toml by @justinchuby in https://github.com/onnx/onnx/pull/6903
• Add native ARM64 Windows Builds by @andife in https://github.com/onnx/onnx/pull/6904
• reduce length of names in create_release.yml by @andife in https://github.com/onnx/onnx/pull/6909
• better condition and explanations in create_release.yml by @andife in https://github.com/onnx/onnx/pull/6910
• Add workflow dispatch option to publish whl to pypi onnx by @andife in https://github.com/onnx/onnx/pull/6819
• Update and rename release_win_freethreading.yml to release_win_x64_fr… by @andife in https://github.com/onnx/onnx/pull/6911
• Use Native Runner für linux Aarch64 whl (public preview runner available) by @andife in https://github.com/onnx/onnx/pull/6907
• Export symbols used by PyTorch by @cyyever in https://github.com/onnx/onnx/pull/6915
• Export more symbols used by PyTorch by @cyyever in https://github.com/onnx/onnx/pull/6916
• Use Python3::Interpreter instead of Python3_EXECUTABLE by @cyyever in https://github.com/onnx/onnx/pull/6918
• Simplify CMake code by @cyyever in https://github.com/onnx/onnx/pull/6927
• Define PYBIND11_DETAILED_ERROR_MESSAGES by @justinchuby in https://github.com/onnx/onnx/pull/6929
• Bump ruff from 0.11.2 to 0.11.8 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6937
• Bump actions/setup-python from 5.5.0 to 5.6.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6940
• Bump actions/download-artifact from 4.1.9 to 4.3.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6939
• Bump types-protobuf from 5.29.1.20250315 to 5.29.1.20250403 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6938
• Bump github/codeql-action from 3.28.13 to 3.28.16 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6941
• Bump codecov/codecov-action from 5.4.0 to 5.4.2 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6944
• Bump stefanzweifel/git-auto-commit-action from 5.1.0 to 5.2.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6942
• Bump ZedThree/clang-tidy-review from 0.20.1 to 0.21.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6943
• Use requirements-release_build in entrypoint.sh by @andife in https://github.com/onnx/onnx/pull/6945
• Replace requirements-release.txt with requirements-release_build.txt by @andife in https://github.com/onnx/onnx/pull/6946
• Update OnnxReleases.md (add remove of rc packages at test.pypi) by @andife in https://github.com/onnx/onnx/pull/6948
• Bump clang-format from 20.1.0 to 20.1.3 by @dependabot[bot] in https://github.com/onnx/onnx/pull/6936
• Fix typos in multiple files by @co63oc in https://github.com/onnx/onnx/pull/6953
• Fix typos in multiple files by @co63oc in https://github.com/onnx/onnx/pull/6956
• [feat] Introduce source_date_epoch for reproducible builds (wheels, linux) by @andife in https://github.com/onnx/onnx/pull/6947
• Add workflow to generate release notes by @ramkrishna2910 in https://github.com/onnx/onnx/pull/6961
• Update test_backend_reference.py by @andife in https://github.com/onnx/onnx/pull/6967
• Display types on cast node test errors by @emmanuel-ferdman in https://github.com/onnx/onnx/pull/6970
• Update protobuf to 6.31.0 by @cyyever in https://github.com/onnx/onnx/pull/6975
• Privately link pybind11 by @cyyever in https://github.com/onnx/onnx/pull/6974
• Fix CMake EXPORT by @cyyever in https://github.com/onnx/onnx/pull/6978
• Extend function inliner to support schema-defined functions (redo) by @gramalingam in https://github.com/onnx/onnx/pull/6976
• Update google test to v1.17.0 by @cyyever in https://github.com/onnx/onnx/pull/6977
• Add Release Roadmap and deprecation policy to RELEASE-MANAGEMENT.md by @andife in https://github.com/onnx/onnx/pull/6969
• Set eol in gitattributes by @cyyever in https://github.com/onnx/onnx/pull/6979
• Simplify CMake code and fix some issues by @cyyever in https://github.com/onnx/onnx/pull/6968
• Update stale workflow to not close issues that should stay open by @justinchuby in https://github.com/onnx/onnx/pull/6986
• Removes one duplicated unit test by @xadupre in https://github.com/onnx/onnx/pull/6989
• Use [[maybe_unused]] by @cyyever in https://github.com/onnx/onnx/pull/6988
• Fix IR 11 release comment of onnx.in.proto by @take-cheeze in https://github.com/onnx/onnx/pull/7001
• Update links to community meetups in README.md by @andife in https://github.com/onnx/onnx/pull/7004
• Fix dubious ownership in repository at '/github/workspace' by @andife in https://github.com/onnx/onnx/pull/6949
• Formatting: Update create_release.yml by @andife in https://github.com/onnx/onnx/pull/7005
• Simplify proto source file generation by @cyyever in https://github.com/onnx/onnx/pull/6992
• Fix symbol refinition in unity builds by @cyyever in https://github.com/onnx/onnx/pull/7006
• Bump ossf/scorecard-action from 2.4.1 to 2.4.2 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7015
• Bump ruff from 0.11.8 to 0.11.12 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7019
• Bump mypy from 1.15.0 to 1.16.0 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7016
• Bump codecov/codecov-action from 5.4.2 to 5.4.3 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7013
• Bump clang-format from 20.1.3 to 20.1.5 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7017
• Bump github/codeql-action from 3.28.16 to 3.28.18 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7014
• [feat] linux wheels python 3.14-dev by @andife in https://github.com/onnx/onnx/pull/6951
• fix broken links to automatic upgrade and downgrade tests in AddNewOp.md by @alx256 in https://github.com/onnx/onnx/pull/7023
• [feat] mac wheels python 3.14-dev by @andife in https://github.com/onnx/onnx/pull/7021
• Shorten names in create_release/release_linux for better UX in github ui by @andife in https://github.com/onnx/onnx/pull/7027
• fix typo in Update RELEASE-MANAGEMENT.md by @andife in https://github.com/onnx/onnx/pull/7029
• Update auto_update_doc.yml by @andife in https://github.com/onnx/onnx/pull/7035
• Add test of UNITY_BUILD in main.yml by @cyyever in https://github.com/onnx/onnx/pull/7007
• use python 3.13.3 (instead of 3.13.4) in release_win_aarch64.yml by @andife in https://github.com/onnx/onnx/pull/7033
• python 3.14-dev for release_win_aarch64.yml by @andife in https://github.com/onnx/onnx/pull/7028
• Add ml_dtypes as a requirement by @justinchuby in https://github.com/onnx/onnx/pull/7045
• Add Pixi development environment by @cbourjau in https://github.com/onnx/onnx/pull/7044
• use newest python 3.13 version in release_win_aarch64.yml by @andife in https://github.com/onnx/onnx/pull/7046
• Replace requirements-release with requirements-release_build in weekly_modelzoo.yml by @andife in https://github.com/onnx/onnx/pull/7039
• Update and rename pixi-build.yml to pixi_build.yml by @andife in https://github.com/onnx/onnx/pull/7047
• clean up unnecessary dependencies in entrypoint.sh by @andife in https://github.com/onnx/onnx/pull/7051
• Fix extra-semi-stmt warnings by @cyyever in https://github.com/onnx/onnx/pull/6771
• remove outdated comment in requirements-dev.txt by @andife in https://github.com/onnx/onnx/pull/7060
• fix typo in RELEASE-MANAGEMENT.md by @andife in https://github.com/onnx/onnx/pull/7062
• Create copilot-setup-steps.yml by @justinchuby in https://github.com/onnx/onnx/pull/7061
• Restore ONNX_VERIFY_PROTO3 by @cyyever in https://github.com/onnx/onnx/pull/7064
• weekly_modelzoo.yml (mac -> linux runner) by @andife in https://github.com/onnx/onnx/pull/7069
• Cleanup onnx_proto CMake code by @cyyever in https://github.com/onnx/onnx/pull/7065
• add fail-fast to release_mac.yml by @andife in https://github.com/onnx/onnx/pull/7077
• run pixi_build.yml only weekly by @andife in https://github.com/onnx/onnx/pull/7078
• Reduce macos runs in main.yml by @andife in https://github.com/onnx/onnx/pull/7076
• Bump prefix-dev/setup-pixi from 0.8.8 to 0.8.10 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7093
• Bump mypy from 1.16.0 to 1.16.1 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7097
• Bump stefanzweifel/git-auto-commit-action from 5.2.0 to 6.0.1 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7092
• Bump github/codeql-action from 3.28.18 to 3.29.2 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7094
• Bump ruff from 0.11.12 to 0.12.1 and improve style by @dependabot[bot] in https://github.com/onnx/onnx/pull/7095
• Bump clang-format from 20.1.5 to 20.1.7 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7096
• Bump protobuf to 6.31.1 by @cyyever in https://github.com/onnx/onnx/pull/7086
• Bump types-protobuf from 5.29.1.20250403 to 6.30.2.20250516 by @dependabot[bot] in https://github.com/onnx/onnx/pull/7018
• Use specific version for mac os runner by @andife in https://github.com/onnx/onnx/pull/7115
• Switch order of steps in release_win_x86_64.yml by @andife in https://github.com/onnx/onnx/pull/7125
• add top level permissions (Update pixi_build.yml) by @andife in https://github.com/onnx/onnx/pull/7126
• define top level permission (Update copilot-setup-steps.yml) by @andife in https://github.com/onnx/onnx/pull/7127
• add python 3.14-dev (release_win_x86_64.yml) by @andife in https://github.com/onnx/onnx/pull/7149
• Add documentation for building and publishing whls to pypi (OnnxReleases.md) by @andife in https://github.com/onnx/onnx/pull/7147
• no pytest for 3.13t (release_win_x86_64.yml) by @andife in https://github.com/onnx/onnx/pull/7150
• Update release.yml module: CI pipelines by @justinchuby in https://github.com/onnx/onnx/pull/7171
• Update RELEASE-MANAGEMENT.md by @andife in https://github.com/onnx/onnx/pull/7160
• add missing call-win_arm64 (Update create_release.yml) by @andife in https://github.com/onnx/onnx/pull/7173
• turn off some tests for 3.13t, 3.14-dev by @andife in https://github.com/onnx/onnx/pull/7162
• Add kv_nonpad_seqlen input to Attention by @yuanyao-nv in https://github.com/onnx/onnx/pull/7164
• Make stale bot ignore "contributions welcome" issues by @justinchuby in https://github.com/onnx/onnx/pull/7180
• update versions for 1.19 release by @yuanyao-nv in https://github.com/onnx/onnx/pull/7182
• Update version to 1.19.0rc1 by @yuanyao-nv in https://github.com/onnx/onnx/pull/7183
• fix condition for publishing to release pypi by @andife in https://github.com/onnx/onnx/pull/7200
• Cherrypick from main: Add markdown file and diagram for in-place KV cache (#7205) by @yuanyao-nv in https://github.com/onnx/onnx/pull/7210
• [1.19] Revert "Use [[maybe_unused]] (#6988)" by @titaiwangms in https://github.com/onnx/onnx/pull/7227
• [1.19] Fix unreachable code by @titaiwangms in https://github.com/onnx/onnx/pull/7229
• Update version number to 1.19.0rc2 by @yuanyao-nv in https://github.com/onnx/onnx/pull/7236
• Cherry-pick Attention fix from main and upgrade version to 1.19.0rc3 by @yuanyao-nv in https://github.com/onnx/onnx/pull/7241
• Update version to 1.19.0 for final release by @yuanyao-nv in https://github.com/onnx/onnx/pull/7247

New Contributors

• @mshudrak made their first contribution in https://github.com/onnx/onnx/pull/6809
• @cainbit made their first contribution in https://github.com/onnx/onnx/pull/6830
• @ngoldbaum made their first contribution in https://github.com/onnx/onnx/pull/6837
• @yadunand-kamath made their first contribution in https://github.com/onnx/onnx/pull/6863
• @ktf made their first contribution in https://github.com/onnx/onnx/pull/6840
• @co63oc made their first contribution in https://github.com/onnx/onnx/pull/6953
• @jagadeeshvx made their first contribution in https://github.com/onnx/onnx/pull/6997
• @alx256 made their first contribution in https://github.com/onnx/onnx/pull/7023
• @robertknight made their first contribution in https://github.com/onnx/onnx/pull/7032
• @amarin16 made their first contribution in https://github.com/onnx/onnx/pull/7074
• @KarelZe made their first contribution in https://github.com/onnx/onnx/pull/6994
• @Copilot made their first contribution in https://github.com/onnx/onnx/pull/7056
• @meilofveeningen-rl made their first contribution in https://github.com/onnx/onnx/pull/7104
• @bentheiii made their first contribution in https://github.com/onnx/onnx/pull/7156
• @zboszor made their first contribution in https://github.com/onnx/onnx/pull/7026
• @kcvlex made their first contribution in https://github.com/onnx/onnx/pull/6686
• @Sunny-Anand made their first contribution in https://github.com/onnx/onnx/pull/7179

Full Changelog: https://github.com/onnx/onnx/compare/v1.18.0...v1.19.0