v1.5.0

June 2026

31 people have contributed to this release through a collective 73 GitHub Pull Requests.

Highlights

• New native implementations of estimators, including: forecasters NBeats, complex exponentional smoothing (CES), dynamic optimised theta model (DOTM), a general purpose forecasting ensemble and SCUM; TSelect channel selector;

• New notebooks for the new forecasters

• Documentation improvements and bug fixes

Anomaly Detection

• [BUG] Rockad doctest fail fix (#3520) @TonyBagnall`

Classification

• [ENH] Fix k-nn predict for k>1 (#3442) @TonyBagnall

• [BUG] ClassifierChannelEnsemble with remainder crashes (#3429) @SotonSweetXss

• [BUG] Fix predict_proba on unequal-length list input in Catch22 and TSFresh classifiers (#3427) (#3446) @gaoflow

• [BUG] Support callable weights in KNeighborsTimeSeriesClassifier (#3445) @gaoflow

• [DOC] Add Raises sections to BaseClassifier docstrings (#3363) {user} Nandinisingh07

• [DOC] Fix classification docstring typos (#3443) @titanniya542-spec

• [ENH] Vectorize OOB divisor counting in RotationForest with np.bincount (#3457) @islem-esi

• [ENH] Deprecates LearningShapeletClassifier (#3485) @TonyBagnall

• [ENH] Refactor HIVE-COTE V1 and V2 to use a modular BaseHIVECOTE framework (#3386) @li-f8

• [ENH] remove prefer=”threads” from Parallel in BaseIntervalForest (#3361) @TonyBagnall

• [BUG] use len(X) instead of X.shape[0] for list input in ShapeletTransformClassifier (fixes #3447) (#3465) @gaoflow

Clustering

• [BUG] Fix TimeSeriesKernelKMeans mutating kernel when kernel="kdtw" (#3424) @maxime2476

• [BUG] Validate uniqueness of custom medoid initialisation indices (#3430) @Booyaka101

• [BUG] Fix TimeSeriesCLARA sampling (#3456) @adam-goose

• [BUG] Reject array init for TimeSeriesCLARA (#3459) @ProfTrader

• [DOC] Fix clustering documentation typos (#3444) @SSDWGG

• [MNT] Deprecate TimeSeriesKShape wrapper from tslearn (#3381) @TonyBagnall

Datasets

• [BUG] Fix error in soft dependencies for HF hub in monster loader (#3408) @Cyril-Meyer

• [BUG] Security issues for data loading (#3333) @MatthewMiddlehurst

• [BUG] Skip Monster dataset loader tests during PR CI (fixes #3466) (#3480) @gaoflow

• [BUG] Fix rehab loader (#3521) @TonyBagnall

• [DEP] deprecation for 1.5 see #3440 (#3441) @TonyBagnall

Distances

• [DOC] Add Examples sections to ShapeDTW distance functions (#3486) {user} laurapiro17

• [ENH] Add Dynamic Alphabet Sizes for SFA (#2844) @patrickzib

Forecasting

• [BUG] clone regressor in RegressionForecaster to prevent mutation (fixes #3448) (#3464) @gaoflow

• [BUG] Fix forecasting regression test: make _LastFeatureRegressor sklearn-clone-compatible (#3469) @TonyBagnall

• [BUG] Force ETS to fit seasonal when given period, (#3477) @TonyBagnall

• [BUG] Fixes AutoETS.iterative_forecast (#3482) @TonyBagnall

• [ENH] NBeats forecaster added (#3357) @lucifer4073

• [ENH] Update iterative signature for theta (#3468) @TonyBagnall

• [ENH] Implement Complex Exponential Smoothing (CES) forecaster (#3463) @TonyBagnall

• [ENH] General purpose forecast ensemble (#3452) @TonyBagnall

• [ENH] Add noise to ets test (#3546) @TonyBagnall

• [ENH] Refactor iterative_forecast for fit/predict differentiation and exog support (#3454) @TonyBagnall

• [ENH] Fix ETS instability through bounds and limits to multiplicative (#3450) @TonyBagnall

• [ENH] Dynamic Optimised Theta Model (DOTM) forecaster (#3455) @TonyBagnall

• [ENH] Implement SCUM, the Simple Combination of Univariate Models forecaster (#3472) @TonyBagnall

• [DOC] Forecasting notebooks (#3550) @TonyBagnall

Networks

• [MNT] Apply precommit auto-fix from ruff (#3384) @SebastianSchmidl

• [MNT] Update tensorflow and refactor networks (#3308) @MatthewMiddlehurst

Regression

• [ENH] Vectorize OOB divisor counting in RotationForest with np.bincount (#3457) @islem-esi

Similarity Search

• [ENH] Improve coverage for similarity search (#3539) @TonyBagnall

Transformations

• [BUG] ShapletTransform contract bug and minor improvements (#3370) @TonyBagnall

• [BUG] Fix ESMOTE sample generation (#3504) @LinGinQiu

• [BUG] OHIT: seed sample generation and stop mutating k/kapa (#3505) @SAY-5

• [BUG] Stratify TSelect validation split (#3492) @nightcityblade

• [BUG] Respect requested distance in elbow class selector (#3493) @nightcityblade

• [BUG] Fix Padder add_noise for integer input (#3511) @gaoflow

• [BUG] Fix rocket random state (#3438) @TonyBagnall

• [BUG] Fix AutocorrelationFunctionTransformer crash with default n_lags=None (#3552) @glitch-ux

• [DOC] Fix imbalance transformer docstrings (#3509) @terminalchai

• [DOC] Fix docstring inaccuracies and typos in unequal_length package (#3528) @vir-cipher

• [DOC] Fix pad_length/truncated_length naming and test docstring in unequal_length (#3536) @gaurav-init

• [ENH] ShapeletTransform block transform for threads (#3372) @TonyBagnall

• [ENH]: add primitive type hints to LogTransformer (#3367) @Nandinisingh07

• [ENH]: add primitive type hints to BoxCoxTransformer - relates to #1454 (#3368) @Nandinisingh07

• [ENH] Enhanced verbose mode for RandomShapeletTransformer (#3383) @TonyBagnall

• [MNT] Improve test coverage for transformations/collection/dictionary_based (PAA, SAX, SFAWhole) (#3535) @TonyBagnall

• [ENH] Implement Tselect channel selection algorithm (#3402) @TonyBagnall

• [DOC] Fix docstring typos and inaccuracies in channel_selection (#3491) (#3530)@MHJanny

• [BUG] fix(unequal_length): validate integer target lengths reject bool and non-positive values (#3507) @axelray-dev

• [BUG] fix: move RandomChannelSelector p validation from –init– to _fit (#3541) @BB0813

Other

• [BUG] Restrict shapelet visualisation to 1D series (#3436) @TonyBagnall

• [BUG] Remove test exclusion for RDST #2290 (#3435) @TonyBagnall

• [MNT] Replace Flake8 with Ruff in pre-commit (#3161) @satwiksps

• [MNT] Add test to check that soft dependency skipping is working as intended (#3411) @MatthewMiddlehurst

• [BUG] fix soft deps ignoring PR_TESTING (#3404) @TonyBagnall

• [ENH] Add suggested fix field to bug template (#3556) @ProfTrader

• [DOC] Fix save_to_ts_file API reference (#3391) (#3393) @li-f8

• [DOC] Revised readme.md (#3388) @TonyBagnall

• [DOC] add HC2 to readme list (#3439) @TonyBagnall

• [DOC] Add automated mini-gallery examples for API pages (#3334) @Kaustbh

• [DOC] Update Code of Conduct reporting link to Monday form (#3478) @Copilot

• [MNT] change precommit yml (#3394) @TonyBagnall

• [MNT] Update scikit-learn upper bound (#3250) @MatthewMiddlehurst

Contributors

@adam-goose, @axelray-dev, @BB0813, @Booyaka101, @Copilot, @Cyril-Meyer, @gaoflow, @gaurav-init, @glitch-ux, @islem-esi, @Kaustbh, @laurapiro17, @li-f8, @LinGinQiu, @lucifer4073, @MatthewMiddlehurst, @maxime2476, @MHJanny, @Nandinisingh07, @nightcityblade, @patrickzib, @ProfTrader, @satwiksps, @SAY-5, @SebastianSchmidl, @SotonSweetXss, @SSDWGG, @terminalchai, @titanniya542-spec, @TonyBagnall, @vir-cipher