builder.group
An indie software studio shipping products and open-source tools in public.
Products built under builder.group, from experiments to production
macOS app to schedule focus sessions with automatic app blocking and forced breaks
iOS timer app that picks a random end time within a set range
macOS pomodoro timer with a cat companion and app blocking
iPhone app to pick a color, find 9 matching things, and fill a 3×3 photo grid
iOS keyboard extension with a Bongo Cat tapping as you type
Web tool that generates a set of images where eyes and objects gaze at a moving target
Web app for learning scripts using the first-letter mnemonic method
Suite of tools for actor line learning, scene practice, and mock auditions
Open-source, video-first customer support tool
Community and payment platform for creators
Shopify app for deferred shipping and bulk order bundling
Automated YouTube channel posting AI-generated chat conversation videos
Automated YouTube channel posting AI-generated marble music videos
AI tool to automate short-form video content creation
Shopify app with pre-built GDPR and EU energy label compliant UI blocks
Open-source libraries and developer tools in the community monorepo
Typed Express and Hono routes backed by OpenAPI paths and Standard Schema validation
Shared TypeScript, ESLint, Prettier, and Vitest configs for Builder Group projects
Typed fetch client with tuple results and opt-in REST, OpenAPI, GraphQL, retry, cache
Plain TypeScript Result tuples with typed errors, narrowing, helpers, JSON-friendly arrays
Provider-free React hooks for feature-state and feature-form subscriptions
Reactive state with computed values and opt-in undo, storage, equality, and queues
Streaming XML, HTML, and SVG tokenizer with typed tokens, selectors, object helpers
Framework-agnostic reactive form state with Standard Schema validation and triggers
Typed env validation with Standard Schema validators, built-in parsers, error reports
Rollup presets for TypeScript libraries with package export discovery and declarations
Composable console logger with levels, formatting, middleware, and testable output
TypeScript ECS with typed plugins, flexible component storage, queries, and tracking
Typed HTML head metadata extraction for title, meta, link, and custom extractors
Typed .with() feature composition with dependency checks for TypeScript objects
Discontinued libraries, kept available for existing users
Validator adapter implementations for Zod, Valibot, Yup, and Standard Schema
Framework-agnostic widget grid model with cell-based layouts and widget data
