duckboost 0.0.2

Fixed

• LOAD duckboost works again in ./build/release/duckdb on a fresh clone. Since the DuckDB 2.0 alpha bump on 2026-09-30, the build compiled duckboost but no longer linked it into the shell, so LOAD duckboost failed with Extension ".../duckboost.duckdb_extension" not found. duckboost is now statically linked into the shell, libduckdb and make test (#34).

Changed

• Bumped the duckdb submodule to 80e17fc (v2.0-cyanoptera) and extension-ci-tools to 969bc76. Macro registration follows DuckDB's ParserOptions API change (#35).

Documentation

• The site is re-rendered from scratch on every publish. The docs workflow builds DuckDB with duckboost and runs every example, so the published output matches main. Committed site/_freeze output is gone.
• New Changelog page on the site, and versioned releases: git tags vX.Y.Z with GitHub pre-releases, starting from v0.0.1.
• Clarified that the .duckdb_extension file is for a separate DuckDB 2.0 shell built from the same duckdb commit. This repo's shell already has duckboost linked in.

duckboost 0.0.1 (soft launch)

Soft launch: the first public pre-release, built against the DuckDB 2.0 alpha (v2.0-cyanoptera). Try it by cloning and building this repo. PyPI and CRAN DuckDB 1.x cannot load it, and the community extension store submission waits for DuckDB 2.0.

• Native histogram GBDT trainer with no external dependencies (backend = 'native', alias reference): regression and classification, quantile / MAE / expectile objectives, categorical features, leaf-wise and oblivious tree growth, sample weights and early stopping on a validation set.
• Training and scoring in SQL: duckboost_train, duckboost_fit, duckboost_predict, duckboost_predict_proba, duckboost_score, duckboost_evaluate, duckboost_evaluate_agg and duckboost_importance.
• duckboost_to_sql exports a model as plain DuckDB SQL (CASE WHEN ensembles), so scoring needs no extension.
• duckboost_import reads XGBoost, LightGBM and CatBoost model dumps.
• Split and preprocessing macros: duckboost_initial_split, duckboost_initial_validation_split, duckboost_vfold, duckboost_dummy, duckboost_levels, duckboost_other and more.
• Optional in-process XGBoost / LightGBM training behind DUCKBOOST_WITH_* build flags, and duckboost_build_info() / duckboost_backends() to inspect a build.
• Documentation site with Getting Started, vignettes, a native vs LightGBM benchmark and a SQL reference.

Known issue: on a fresh clone, LOAD duckboost fails in ./build/release/duckdb. Load the file by path instead, LOAD 'build/release/extension/duckboost/duckboost.duckdb_extension';, or update to 0.0.2.