A/B test sample-size, total-size, and test-duration calculator for App Store Product Page Optimization and Google Play Store Listing Experiments — two-proportion z-test, zero dependencies.

Plugin to help with personalization, a/b testing when using Sanity

Temp plugin to ease use of statsig feature flags until platform feature flags are available

Persisted projection cache (ctx.sessionProjectionCache): durable per-session projection checkpoints over the domain data form, throttled write-behind, and the cold-read ladder (cache row + persistence tail replay)

Combined session query service contract with concrete reads, traces, and filters

VS Code Extensions Manager

Core functions and utilities for Langfuse packages

TypeScript definitions for heic-convert

Emscripten distribution of libheif for Node.JS and the browser

A build cache provider plugin for the Expo CLI

[GrowthBook](https://www.growthbook.io) is an open source Feature Flagging and Experimentation platform.

A registry of TypeScript declaration file packages published within the @types scope.

Versioned evaluation datasets for Fabric Experiments: schemas, store contract, JSONL import.

Small library to parse file listings into JavaScript objects

A Complete Microsoft Excel-like JavaScript Spreadsheet for Enterprise Applications

performant confetti animation in the browser

Static file serving and directory listing

[GrowthBook](https://www.growthbook.io) is a modular Feature Flagging and Experimentation platform.

Spread.Sheets react support

SpreadJS Designer Component present as a control that could be embedded into your web application easily, and also provided flexible, customizable configuration to achieve your business logic.