v26.08.00

What's Changed

🚨 Breaking Changes

• Auto select CAGRA build algorithm for hnsw::build by @tfeher in #1719
• Track tensor and index lifetimes in the Rust DLPack bindings by @yan-zaretskiy in #2245
• wheels: build CUDA 13 wheels with latest CTK (13.3.0) by @jameslamb in #2305
• [FEA] Multi-node Out of Core Streaming KMeans API by @tarang-jain in #2066
• Rust: builder-based params, per-module errors by @yan-zaretskiy in #2284
• [KMeans] Rename streaming_batch_size param by @tarang-jain in #2328
• Update DLPack to 1.0 by @divyegala in #2354
• Apply ABI Breaking Changes to KMeans Params (release branch) by @tarang-jain in #2329
• Revert "Update DLPack to 1.0 (#2354)" by @bdice in #2366
• [REVIEW] New Dataset API Clarifying Ownership by @HowardHuang1 in #1846

🐛 Bug Fixes

• [CI nightly] Temporarily disable conda-python-tests codecov reporting by @aamijar in #2274
• Exclude SPDX copyright lines from .clang-format by @achirkin in #2275
• Fix FastIntDiv tparam by @aamijar in #2278
• CAGRA: fix concurrent initialization and usage of dataset descriptor by @achirkin in #2237
• Revert "FIX: disable warpspeed scan (#2062)" by @bdice in #2074
• Predict IVF-PQ FP16 overflow and auto-switch to FP32 by @huuanhhuyn in #2246
• Update .clang-format to fix copyright and style check by @HowardHuang1 in #2304
• Fix batched silhouette score stream ordering by @csadorf in #2316
• fix(pre-commit): normalize SPDX handling by @bdice in #2318
• Remove fragile explicit import that breaks with jextract/CUDA changes by @imotov in #2124
• Remove trailing new lines from GTest names by @robertmaynard in #2312
• Update Comparison Branch for ABI Stability Git Workflow by @tarang-jain in #2331
• CAGRA ACE build: avoid rounding down graph degree during sub-index build by @achirkin in #2335
• [BUG] Fix CAGRA search recall with a graph built by NN Descent by @enp1s0 in #819
• Fix IVF extend list resize bug by @qwertyforce in #2297
• Use batched unfused 1-NN for KMeans on Blackwell by @viclafargue in #2346
• Fix prefilter bitmap host buffer under-allocation in Java bindings by @imotov in #2375
• Fix incorrect distances tensor type in cuvsCagraSearch by @imotov in #2372

📖 Documentation

• Update cuvs-bench docs to show both CLI and Python API usage by @jnke2016 in #2084
• doc: fix better the python api example by @yihong0618 in #2080
• docs: RAFT->cuVS in issue templates by @jameslamb in #2097
• Updating Fern and fixing a couple small links by @cjnolet in #2210
• Adding nvidia as the "global-theme" by @cjnolet in #2216
• remove pypi.nvidia.com from install docs by @jameslamb in #2223
• Add code of conduct by @aamijar in #2272
• Readme: ivf-rabitq paper in references by @aamijar in #1877
• contributing.md link to docs by @aamijar in #2119
• Enable multi-source docs for cuVS Fern instance by @aschilling-nv in #2277
• Remove legacy RAPIDS Doxygen theme assets by @bdice in #2286

🚀 New Features

• Add JIT-LTO based filter UDF support for CAGRA by @dantegd in #2132
• Support IVF-RaBitQ in cuVS Library by @Stardust-SJF in #1866
• Improve CAGRA-Q performance and add support for PQ_LEN=8 by @enp1s0 in #1533
• Expose raft::memory_tracking_resources to C/Python/Java/Rust by @achirkin in #2073
• Scripts for Billion-Scale Synthetic Data Generation by @jinsolp in #2247
• Add CAGRA build heuristics independent of HNSW parameters by @achirkin in #2345
• CAGRA Bloom Filter by @divyegala in #2236

🛠️ Improvements

• Enforce smaller wheel sizes by @KyleFromNVIDIA in #2089
• Require CMake 4.0 by @KyleFromNVIDIA in #2078
• Use L2 for IVF-PQ coarse clustering when the main metric is IP by @yan-zaretskiy in #2076
• Improve devcontainer startup times by @trxcllnt in #2109
• fix(visibility): add symbol visibility controls to cuvs by @vyasr in #2101
• [REVIEW] Add OpenSearch backend to cuvs-bench by @jrbourbeau in #2012
• Forward merge fix by @cjnolet in #2140
• Add SECURITY.md by @jameslamb in #2139
• merge release/26.06 into main by @jameslamb in #2146
• IVF-SQ Python API by @viclafargue in #1913
• fix(ci): fix configuration for breaking change notification workflow by @jameslamb in #2151
• [FEA] JIT LTO Pairwise Distances by @tarang-jain in #2099
• uint64 header support for cuvs_bench by @jinsolp in #2130
• refactor: switch to rapids-artifact-name for consistent artifact naming by @gforsyth in #2136
• Build and test with CUDA 13.3.0 by @bdice in #2226
• Require C++20 for C++ CUDA examples by @HowardHuang1 in #2244
• Use main shared-workflows branch by @bdice in #2259
• Switch to public RAFT numpy_serialize APIs by @julianmi in #2038
• fix(java): use Maven mirror, remove unnecessary plugins, other CI-stability improvements by @jameslamb in #2253
• Update CODEOWNERS team names for rapidsai->NVIDIA migration by @josephine-wolf-oberholtzer in #2261
• Re-enable verify-codeowners pre-commit check by @josephine-wolf-oberholtzer in #2270
• Temporarily disable conda-python-tests codecov reporting by @josephine-wolf-oberholtzer in #2271
• Upgrade faiss to 1.14.3 by @aamijar in #2134
• Update CuPy and NumPy dependency specs by @bdice in #2260
• Harden multi-GPU ANN tests for larger GPU counts by @viclafargue in #2280
• SNMG Batched KMeans Python API by @viclafargue in #2154
• Re-enable Python code coverage by @josephine-wolf-oberholtzer in #2290
• fix(deps): try to dynamically load nvrtc from wheel by @gforsyth in #2299
• switch from 'cuda-python' to specific components (e.g. 'cuda-bindings') by @jameslamb in #2294
• Switch Product Quantization VQ to mean() when n_centers = 1 by @lowener in #2250
• Native row-major PCA by @aamijar in #2125
• Add build option to overwrite libraft logging level by @huuanhhuyn in #2276
• Add missing memory estimates by @huuanhhuyn in #2255
• update actions/checkout to fix zizmor by @arhag23 in #2327
• Empty commit to trigger a build by @bdice in #2341
• Improve balanced k-means rebalancing by @anaruse in #2222
• All-neighbors graph on host memory by @jinsolp in #2313
• Multi partition cagra search by @jamxia155 in #2035

New Contributors

• @yihong0618 made their first contribution in #2080
• @HowardHuang1 made their first contribution in #2244
• @Stardust-SJF made their first contribution in #1866
• @josephine-wolf-oberholtzer made their first contribution in #2261
• @aschilling-nv made their first contribution in #2277
• @huuanhhuyn made their first contribution in #2246
• @qwertyforce made their first contribution in #2297

Full Changelog: v26.08.00a...v26.08.00