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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

1.0.0 - 2025-11-21

Added

  • Initial release of rollout-bucket
  • RolloutBucket class with deterministic bucketing using MurmurHash3
  • getBucket() method for bucket assignment (0-99)
  • isEnabled() method for percentage-based feature flags
  • getVariant() method for multi-variant A/B testing with TypeScript generics
  • Comprehensive test suite with 18 tests (100% coverage)
  • Chi-square statistical validation for distribution uniformity
  • Dual ESM/CommonJS module support
  • TypeScript type definitions and source maps
  • Complete API documentation in README
  • MIT license
  • GitHub Actions CI workflow for Node.js 18.x, 20.x, 22.x

Features

  • Deterministic bucketing: Same user always gets same bucket for a feature
  • Feature isolation: Different features produce independent distributions
  • Uniform distribution: Chi-square tested across 10,000 users
  • Lightweight: < 5KB minified bundle
  • Type-safe: Full TypeScript support with generics