Changelog

All notable changes to this project are documented in this file.

[0.3.0] - 2025-01-14

Code Quality
- Updated RuboCop configuration to handle new cops and resolve style warnings
- Fixed operator precedence ambiguity in Three-Parameter Model calculations
- Added MFA requirement to gemspec metadata (RuboCop requirement)

This release maintains full backward compatibility with previous versions
All 46 existing tests continue to pass
Comprehensive performance benchmarking suite remains available via bundle exec rake benchmark:all

Missing Data Strategies
- Introduced a missing_strategy parameter for Rasch, TwoParameterModel, and ThreeParameterModel to handle nil responses:
  - :ignore (default) – skip missing responses in log-likelihood and gradients.
  - :treat_as_incorrect – interpret nil as 0.
  - :treat_as_correct – interpret nil as 1.
- Updated RSpec tests to cover each strategy and ensure graceful handling of missing responses.
Expanded Test Coverage
- Added tests for repeated fits, deterministic seeding, larger random datasets, and new edge cases (all-correct/all-incorrect).
- Improved specs for parameter clamping (discriminations, guessing in 2PL/3PL).
Adaptive Learning Rate Enhancements
- Enhanced convergence checks combining log-likelihood changes and average parameter updates.
- Clearer revert-and-decay logic if the likelihood decreases on a given step.

Documentation / README
- Updated the README to reflect new missing data strategies, advanced usage (adaptive learning rate, parameter clamping), and test instructions.
- Added examples showcasing how to set missing_strategy for each model.

This release remains backward-compatible with 0.1.x in terms of existing usage; the default :ignore missing-data approach matches prior behavior.
If upgrading, simply update your gem and enjoy the new features.
For more details, see the updated README and expanded test suites.

(If you have older versions below 0.2.0, you can keep them documented similarly, e.g., ## [0.1.x] ..., under this new entry.)