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feature_types silently discarded in certain situations

Status: Open.

#12527 In dmlc/xgboost;

· hopper-signifyd opened on Sep 1, 2026

XGBoosterGetCategories writes to the local parameter instead of *out

Status: Open.

#12526 In dmlc/xgboost;

· hopper-signifyd opened on Sep 1, 2026

The two type-consistency CHECK messages in TreeGenerator::SplitNode are swapped

Status: Open.

#12525 In dmlc/xgboost;

· hopper-signifyd opened on Sep 1, 2026

Enable CI Support for ppc64le (IBM Power) Architecture

Status: Open.

#12523 In dmlc/xgboost;

· sandeepgupta12 opened on Sep 1, 2026

Portable RNG state: measurements on the Philox throughput question from #12485

Status: Open.

#12509 In dmlc/xgboost;

· sinhaparth5 opened on Aug 28, 2026

Monotone constraints in vector-leaf models

feature-request

Status: Open.

#12506 In dmlc/xgboost;

· jprafael opened on Aug 27, 2026

[doc] Add R tab to parameter tuning tutorial

Status: Open.

#12501 In dmlc/xgboost;

· sansha521 opened on Aug 26, 2026

[jvm-packages] Add opt-in sparse data optimization to XGBoost4J-Spark

feature-request

Status: Open.

#12495 In dmlc/xgboost;

· xiaoh1024 opened on Aug 21, 2026

[R-package] compiler warning on clang + arm64 macOS: argument unused during compilation: '-msse2'

Status: Open.

#12490 In dmlc/xgboost;

· jameslamb opened on Aug 20, 2026

Usage of scalar-leaf trees with multi-output objectives

Status: Open.

#12486 In dmlc/xgboost;

· david-cortes opened on Aug 19, 2026

maven central usage limit.

Status: Open.

#12471 In dmlc/xgboost;

· trivialfis opened on Aug 15, 2026

XGBoostError: input stream corrupted when unpickling a Linux-trained Booster on Windows (xgboost 3.3.0)

type: bug

Status: Open.

#12459 In dmlc/xgboost;

· CharlesHMJr opened on Aug 13, 2026