Lightgbm

- [c++] update to fmt 11.1.2, fast_double_parser 0.8.0 jameslamb (6802)
- [ci] fix valgrind workflow jameslamb (6816)
- [ci] validate pyproject file by json schema StrikerRUS (6813)
- [ci] [python-package] update pre-commit hooks to latest versions jameslamb (6817)
- [ci]: Bump release-drafter/release-drafter from 6.0.0 to 6.1.0 in the ci-dependencies group [dependabot[bot]](https://github.com/apps/dependabot) (#6810)
- [ci] fix errors about line length in yaml files (Part 4) StrikerRUS (6804)
- [ci] remove pandas before testing that LightGBM can be imported without extra deps StrikerRUS (6801)
- [ci] fix errors about comments indentation in yaml files (Part 3) StrikerRUS (6794)
- [ci] fix errors about indentation in yaml files (Part 2) StrikerRUS (6789)
- [ci] [python-package] build macOS x86_64 wheels on macOS 13 (Ventura) jameslamb (6669)
- [ci] add yaml files linter to pre-commit hook but skip some rules for now (Part 1) StrikerRUS (6763)
- [ci] lock inactive issues and PRs at different time StrikerRUS (6764)
- [ci][python-package] add testing for the shape of raw score predictions StrikerRUS (6765)
- [ci] pin more dependencies in Python 3.8 environment jameslamb (6771)
- [CUDA] remove src/treelearner/kernels shiyu1994 (6766)
- [python-package] stop relying on string concatenation / splitting for cv() eval results jameslamb (6761)
- [ci] Add Release Drafter workflow StrikerRUS (6754)
- [python-package] Rename `cvfolds` variable into `cvbooster` in `engine.cv` function ClaudioSalvatoreArcidiacono (6762)
- [python-package] simplify eval result printing jameslamb (6749)
- [ci] fix linkchecker job jameslamb (6757)
- [ci] remove Docker volumes during Azure cleanup StrikerRUS (6760)
- [ci] use Ruff linter instead of isort StrikerRUS (6755)
- [ci] set upper bound on dask jmoralez (6742)
- [c++] include <cstdint> wherever uint8_t is used jameslamb (6736)
- [python-package] simplify scikit-learn 1.6+ tags support jameslamb (6735)
- [ci] Introduce `typos` pre-commit hook borchero (6564)
- [ci] [python-package] [R-package] adapt to scikit-learn check_sample_weight_equivalence changes, stop testing against R 3.6 on Linux jameslamb (6733)
- [python-package][R-package] adapt to scikit-learn 1.6 testing changes, pin more packages in R 3.6 CI jobs jameslamb (6718)
- [ci] [R-package] re-enable 'rchk' checks jameslamb (6713)
- [ci] check PowerShell scripts with PSScriptAnalyzer (part 3) StrikerRUS (6710)
- [ci] check JavaScript code with `biome` tool StrikerRUS (6711)
- [ci] check PowerShell scripts with PSScriptAnalyzer (part 2) StrikerRUS (6709)
- [ci] check PowerShell scripts with PSScriptAnalyzer (part 1) StrikerRUS (6704)
- [ci] [R-package] remove code for 'rchk' checks jameslamb (6545)
- [ci] Fix version matching between RTD pages and R-package pages StrikerRUS (6673)
- [python-package] remove MSVS solution files from sdist jameslamb (6698)
- [ci] set `MinimumVisualStudioVersion` to MSVS 2015 StrikerRUS (6689)
- [ci] fix build of LightGBM with MSVS GUI StrikerRUS (6690)
- [cmake] group sanitizer options together StrikerRUS (6688)
- [ci] add shellcheck, use latest pre-commit hook versions jameslamb (6685)
- [ci] fix some shellcheck warnings in package-building scripts vnherdeiro (6641)
- [python-package] deprecate support for H2O 'datatable' jameslamb (6670)
- [ci] enable OpenMP support in cpp tests StrikerRUS (6676)
- [python-package] ignore scikit-learn 'check_sample_weight_equivalence' estimator check (fixes 6678) jameslamb (6679)
- [ci] fix shellcheck warnings in CI scripts vnherdeiro (6646)
- [ci] Restore MPI jobs on macOS StrikerRUS (6664)
- [ci] Update CUDA versions for CI StrikerRUS (6539)
- [ci] replace uses of 'mamba' with 'conda', use Python 12 for test-python-latest-job jameslamb (6663)
- [cmake] simplify SWIG config StrikerRUS (6648)
- [ci] [R-package] re-enable R-devel clang16 job (fixes 6607) jameslamb (6642)
- [cmake] remove unused variable StrikerRUS (6647)
- [ci] [python-package] temporarily stop testing against scikit-learn nightlies, load lib_lightgbm earlier jameslamb (6654)
- [ci] prevent C API tests from leaving files behind (fixes 6361) jameslamb (6637)
- [python-package] limit when num_boost_round warnings are emitted (fixes 6324) jameslamb (6579)
- [ci] prevent Python tests from leaving behind files vnherdeiro (6626)
- fix some shellcheck warnings vnherdeiro (6621)
- [ci] fix linux runners running out of disk space (fixed 6635) jameslamb (6636)
- [python-package] remove setup.cfg jameslamb (6624)
- [cmake] consolidate set_target_properties() calls jameslamb (6594)
- [ci] prevent `train.binary.bin` and `lgb_train_data.bin` files being left behind after testing bili2002 (6606)
- [ci] update some linting versions jameslamb (6598)
- [ci] skip R-devel clang16 job and use gcc-12 for macOS Python jobs jameslamb (6608)
- [python-package] update to scikit-build-core 0.10 jameslamb (6597)
- [ci] restore nuget artifact creation StrikerRUS (6593)
- [R-package] [cmake] simplify CMake-based R builds jameslamb (6591)
- [cmake] stop using file(GLOB) jameslamb (6588)
- [ci] prevent `categorical.model` and `model.txt` files being left behind after testing neNasko1 (6590)
- [ci] Always use latest SWIG version in Windows CI job StrikerRUS (6541)
- [ci] place all CI helpers under the .ci folder and use - instead of _ in their names StrikerRUS (6581)
- [ci] fix MSVC warning about builds in temp directory StrikerRUS (6573)
- bump development version to 4.5.0.99 jameslamb (6575)
- [ci] ask pip to always install local artifact but not download package from PyPI StrikerRUS (6574)

- [ci] modify CodeQL settings jameslamb (6563)
- [ci] revert clang-18 LD_LIBRARY_PATH workaround jameslamb (6559)
- [ci] [R-package] help linker find libstdc++.so.1 in clang18 job (fixes 6553) jameslamb (6554)
- [ci] update codeowners jameslamb (6542)
- [ci] [R-package] use --no-xattrs when re-tarring CRAN-style package jameslamb (6540)
- [ci] [R-package] add CI jobs covering more CRAN "additional checks", fix R_NO_REMAP warnings (fixes 6369) jameslamb (6523)
- [ci] [R-package] add arm64 macOS R-package CI job (fixes 6481) jameslamb (6494)
- [ci] restore aarch64 linux builds (fixes 6509) jameslamb (6527)
- [test][python] fix pandas DeprecationWarning about `is_sparse` function StrikerRUS (6532)
- fix cpp casting errors "Comparison of narrow type with wide type in loop condition" StrikerRUS (6533)
- [python-package] avoid overwriting dependencies via 'build-python.sh install' jameslamb (6526)
- [tests][python] fix nan in pandas bool column StrikerRUS (6530)
- Remove template parameters from copy constructor hgminh95 (6514)
- [ci] prevent `lgb.model` and `lgb.pkl` files being left behind after testing nicklamiller (6518)
- [ci] [R-package] run 'R CMD check' as a foreground task jameslamb (6508)
- [CMake] Use CMAKE_MSVC_RUNTIME_LIBRARY to apply /MT hcho3 (6484)
- [ci] resolve shellcheck errors in .ci/check_python_dists.sh Kunal-Singh-Dadhwal (6503)
- [ci] skip aarch64 linux job jameslamb (6517)
- [R-package] Use `Rf_`-prefixed versions of protect/unprotect david-cortes (6502)
- [ci] reduce repetition of BUILD_DIRECTORY in CI scripts jameslamb (6497)
- [ci] remove OpenMP / MKL workaround in CI jobs jameslamb (6496)
- [ci] [docs] fix link-checks job jameslamb (6495)
- [python-package] Change build settings to set strict-config to false Jorricks (6493)
- [ci] remove unnecessary package installations in CI jameslamb (6488)
- chore: update dataset_loader.cpp eltociear (6483)
- bump development version to 4.4.0.99 jameslamb (6485)

- [python-package] add a few type hints in LGBMModel.fit() jameslamb (6470)
- [python-package] clarify max_depth warning and limit when it is emitted jameslamb (6402)
- [ci] upgrade linters to latest version jameslamb (6472)
- [ci] [R-package] add new linters from {lintr} 3.1.1 jameslamb (6471)
- [python-package] make LGBMDeprecationWarning inherit from FutureWarning jameslamb (6447)
- [ci] further simplify CI configurations jameslamb (6463)
- [ci] fix CUDA 11.8 builds (fixes 6466) jameslamb (6465)
- [ci] simplify CI configurations, parallelize compilation, test CUDA on Ubuntu 22.04 jameslamb (6458)
- [ci]: Bump actions/checkout from 1 to 4 in the ci-dependencies group dependabot (6453)
- [cmake] switch to FindCUDAToolkit characat0 (6457)
- [R-package] [python-package] deprecate Dataset arguments to cv() and train() jameslamb (6446)
- [ci] Add dependabot configuration borchero (6449)
- [python-package] upgrade to scikit-build-core 0.9.3 jameslamb (6263)
- deprecate HDFS support jameslamb (6443)
- [c++] remove uses of '..' in headers jameslamb (6409)
- [R-package] always name the shared library 'lightgbm', not 'lib_lightgbm' jameslamb (6432)
- [R-package] [ci] Manually install 'Matrix' (fixes 6433) jameslamb (6434)
- [ci] Skip Arrow tests on AppVeyor, use Intel macOS runners, upgrade to XCode 14.3 on macOS jobs, disable MacOS MPI jobs borchero (6425)
- [ci] raise floors on CI dependencies jameslamb (6375)
- [ci] make shell scripts stricter jameslamb (6266)
- [python-package] prevent build-python.sh from modifying already-installed dependencies jameslamb (6403)
- [ci] reduce hard-coding of host architecture jameslamb (6395)
- [c++] remove unused variable 'need_connect_cnt' jameslamb (6410)
- [ci] clean source directory at the beginning of every Azure DevOps build jameslamb (6416)
- [ci] Fix Azure Pipeline Agents shiyu1994 (6407)
- [ci] [R-package] re-enable r-sanitizers jobs (fixes 6367) jameslamb (6374)
- [ci] prevent trailing whitespace, ensure files end with newline jameslamb (6373)
- [ci] [docs] update some docs and CI dependencies jameslamb (6346)
- [ci] [python-package] remove unused flake8 configuration jameslamb (6372)
- [ci] put ceiling on graphviz in Python 3.7 jobs jameslamb (6370)
- [ci] Fix R 3.6 tests, dask tests, compatibility with dask>=2024.3.1 borchero (6357)
- [ci] [python-package] check for untyped definitions with mypy jameslamb (6339)
- [ci] ignore ruff-format changes in git blame (fixes 6304) jameslamb (6345)
- [c++] remove unnecessary include in CLI jameslamb (6342)
- [ci] [python-package] enable ruff-format on all Python code jameslamb (6336)
- [python-package] remove unused type alias jameslamb (6341)
- [ci] [python-package] enforce 'pylint' checks (fixes 4308) jameslamb (6334)
- [ci] [python-package] enable ruff-format on tests and examples jameslamb (6317)
- [python-package] fix mypy error about pyarrow data jameslamb (6333)
- [ci] remove unnecessary workarounds in R-package macOS jobs jameslamb (6331)
- [ci] remove workflow_dispatch from no-response configuration jameslamb (6330)
- [ci] fix no-response permissions jameslamb (6323)
- [ci] enable ruff-format on some files, add pre-commit config jameslamb (6308)
- [ci] ensure shell script exit codes are in range 0-255 jameslamb (6305)
- [ci] fix installation of clang-18 (fixes 6306) jameslamb (6307)
- [ci] [R-package] pin to older setup-pandoc for R 3.6 jobs (fixes 6298) jameslamb (6299)
- bump development version to 4.3.0.99 jameslamb (6287)

Changes

💡 New Features

- [CUDA] Add arch=8.9 to CUDA_ARCHS for RTX 40XX DmitryUlyanov (6272)

🔨 Breaking

- [cmake] [c++] require CMake 3.18+ jameslamb (6260)
- [R-package] remove readRDS.lgb.Booster() and saveRDS.lgb.Booster() jameslamb (6246)

🚀 Efficiency Improvement

- [R-package] Remove non-beneficial parallelization david-cortes (6209)

🐛 Bug Fixes

- [R-package] [ci] remove unnecessary include in linear_tree_learner (fixes 6264) jameslamb (6265)
- [cmake] [CUDA] ignore CUDA-specific source files in non-CUDA builds (fixes 6267) sabjohnso (6268)
- [c++] include OpenMP-control files in MSBuild solution file (fixes 6238) jameslamb (6251)
- [cmake] [swig] use CMake's built-in file-copying mechanisms instead of 'cp' jameslamb (6259)

📖 Documentation

- [docs] Add LightGBMLSS to README StatMixedML (6254)
- [ci] [docs] add Oliver to CODEOWNERS jameslamb (6247)
- Fix small typo and grammar in docs arunstar (6245)

🧰 Maintenance

- [ci] fix conda env creation in 'regular' CI job (fixes 6282) jameslamb (6283)
- [R-package] [ci] switch vignettes from 'rmarkdown' to 'markdown' jameslamb (6258)
- [python-package] fix mypy error about pandas categorical features jameslamb (6253)
- [ci] update issue-locking workflow jameslamb (6256)
- [ci] upgrade to GoogleTest v1.14.0 (fixes 5976) jameslamb (5981)
- [ci] [R-package] speed up valgrind job jameslamb (6237)
- bump development version to 4.2.0.99 jameslamb (6241)

- [ci] [R-package] allow more possibly-lost warnings from valgrind jameslamb (6233)
- [ci] Upgrade Azure VMSS to use Mariner Linux shiyu1994 (6222)
- Add msvc conformance check Zhaojun-Liu (6234)
- [python-package] Add tests for passing Arrow arrays with empty chunks borchero (6210)
- [R-package] change CRAN maintainer jameslamb (6224)
- [CUDA] fix typo in error message jameslamb (6207)
- [python-package] ignore mypy errors related to ctypes string buffers jameslamb (6198)
- [python-package] consolidate pandas-to-numpy conversion code jameslamb (6156)
- [R-package] standardize naming of internal functions jameslamb (6179)
- [R-package] remove unreachable code jameslamb (6180)
- allow new files in include/LightGBM jameslamb (6177)
- [R-package] Use `cat()` instead of `print()` for metrics and callbacks david-cortes (6171)
- [ci] resolve warning in tests jameslamb (6154)
- [ci] use `mamba` instead of `conda` in macOS and Linux CI jobs borchero (6140)
- factor out uses of omp_get_num_threads() and omp_get_max_threads() outside of OpenMP wrapper jameslamb (6133)
- remove unnecessary allocations in HistogramSumReducer jameslamb (6132)
- [ci] [R-package] enforce more {lintr} checks jameslamb (6130)
- fix compiler warnings for CPP tests jameslamb (6124)
- [ci] [R-package] test against R 4.3 on Windows jameslamb (6061)
- [python-package] reorganize early stopping callback jameslamb (6114)
- [python-package] simplify Dataset._compare_params_for_warning() jameslamb (6120)
- [ci] fix sh-compatibility issue in build-cran-package.sh jameslamb (6118)
- [python-package] remove unnecessary allocations in ctypes code jameslamb (6111)
- [python-package] fix mypy errors in Dataset construction jameslamb (6106)
- [ci] ensure correct R version is used on GitHub Actions (fixes 5640) jameslamb (6107)
- [python-package] fix mypy error about eval result tuples jameslamb (6105)
- [python-package] fix mypy error from Dataset.pandas_categorical jameslamb (6098)
- [ci] Fix typo in dependencies borchero (6100)
- [python-package] fix mypy errors related to eval result parsing in callbacks jameslamb (6096)
- [python-package] mark EarlyStopException as part of public API jameslamb (6095)
- [python-package] fix mypy errors related to eval result tuples jameslamb (6097)
- update to fmt 10.1.1, fast_double_parser 0.7.0 jameslamb (6074)

- Remove superfluous todo from gitignore borchero (6081)
- [python-package] simplify processing of pandas data jameslamb (6066)
- [ci] [R-package] test against R 4.3 on Linux and macOS jameslamb (6075)
- reduce verbosity of some log messages jameslamb (6073)
- [python-package] remove CVBooster._append() jameslamb (6057)
- [python-package] use dataclass for CallbackEnv jameslamb (6048)
- [ci] [python-package] add more linting checks jameslamb (6049)
- [ci] prevent lock-threads from locking issues with label 'feature request' jameslamb (6047)
- [ci] add bot to lock inactive issues and PRs jameslamb (6037)
- [ci] fix GPG key download for R Linux jobs (fixes 6038) jameslamb (6039)
- [ci] enforce dask version to be >=2023.5.0 in some builds (fixes 6030) shiyu1994 (6032)
- [ci] [R-package] use {lintr} 3.1 jameslamb (5997)
- [python-package] replace np.find_common_type with np.result_type jmoralez (5999)
- [ci] simplify CODEOWNERS jameslamb (5998)
- [R-package] consolidate testing constants in helpers file jameslamb (5992)
- [R-package] remove unused internal variables jameslamb (5991)
- [ci] use newer h5py in AppVeyor jobs (fixes 5995) jameslamb (5996)
- [python-package] make _InnerPredictor construction stricter jameslamb (5961)

----

> **Note**
>
> This release of the R package was not submitted to CRAN, due to the issues documented in https://github.com/microsoft/LightGBM/issues/5987.