Fix RMSE bug + temporal split

What's Changed

• Add fractional temporal splitting by @mdekstrand in #628
• don't crash on empty lists in RMSE by @mdekstrand in #629

Full Changelog: v2025.1.1b6...v2025.1.1b7

Now with a command line!

This adds an initial LensKit command-line utility and some small quality-of-life bits.

What's Changed

• Add utility function to load seeds from configuration files by @mdekstrand in #625
• Add Markdown dataset statistics by @mdekstrand in #626
• Add LensKit CLI tool and move data tools into it by @mdekstrand in #627

Full Changelog: v2025.1.1b5...v2025.1.1b6

Fix obscure user-KNN bug

This fixes some bugs when the rating data is float64. This is not triggered by usual pathways, but some nonstandard data loading logic may activate it.

What's Changed

• Test and fix components when input ratings are doubles by @mdekstrand in #630

Full Changelog: v2025.1.1b7...v2025.1.1.b8

Small user-user bug fix

Fix for a small type error in user-user CF, found by a student.

Fourth beta - training config and splitting

This includes some small fixes and improvements:

• upper bound on temporal split
• popularity metric
• better CUDA configuration
• better iterative training logging

What's Changed

• [MINOR:fix link] Update README.md by @cakiki in #621
• Add a popularity metric by @mdekstrand in #622
• add upper bound for global temporal split by @mdekstrand in #623

New Contributors

• @cakiki made their first contribution in #621

Full Changelog: v2025.1.1b3...v2025.1.1b4

Third beta

Mostly documentation fixes, plus some consistency work on model configuration.

Second beta

Second beta release, with working MovieLens full content data loaders and dataset attributes.

Beta — let others start using the code

There are a few more things to add and test before rolling 2025.1, but with the new data model changes I'm going to call it betea.

What's Changed

• Separate PipelineBuilder from Pipeline and update run api by @mdekstrand in #606
• Re-add unnormalized DCG metric by @mdekstrand in #608
• Add ARM and Windows vanilla Python to CI runs by @mdekstrand in #609
• Implement data set builders and the new entity/relationship model by @mdekstrand in #610
• Simplify training history components with new dataset by @mdekstrand in #612
• Make vocabularies immutable and stop using copy() by @mdekstrand in #611
• Tweaks for live class demo by @mdekstrand in #613

Full Changelog: v2025.0.0a6...v2025.1.0b1

Small component typing update

This is a very small bump that adds better component base class typing.

What's Changed

• Update component configuration type warnings by @mdekstrand in #603

Full Changelog: v2025.0.0a5...v2025.0.0a6

Alpha 5: configuration

Mostly changes around the component API:

• use Pydantic models for configuration
• update Trainable interface to take training options
• add iterative training interface

What's Changed

• Use Pydantic models for component configurations by @mdekstrand in #596
• Re-add return type variable for Component by @mdekstrand in #598
• Migrate HPF to configuration object and fix BiasConfig serialization by @mdekstrand in #600
• Move Trainable interface and add TrainingOptions by @mdekstrand in #599
• Add iterative training API by @mdekstrand in #601
• rename "Lenskit" to LensKit for consistency by @mdekstrand in #602

Full Changelog: v2025.0.0a4...v2025.0.0a5