Open Source

Builder Toolkits

Practical open-source toolkits for product builders — the loops, prompts, figures, and ship scripts that come out of running agents on real products.

Open SourceClaude CodeAgentsShip Pipeline

Tools I built because I needed them, then cleaned up enough to hand to someone else. Each one is extracted from a real product loop on this site, not written as a demo.

What they share

Built for and with Claude Code — two install as plugins, the loop is copied into your repo
Bilingual where it matters: docs in Traditional Chinese, prompts and code in English
Every write is gated or checked; nothing ships on trust alone
MIT licensed and public, except the ship pipeline still under development

Loop EngineeringOpen-source reference implementation of an autonomous product loop for Claude Code: audit → positioning → research → value gate → PRD → build → validate → ship, as a perpetual graph with two independent gates, a deterministic driver, and real overnight run data.
Graph EngineeringOpen-source (MIT) prompt templates that turn AI agents from a waiting line into a graph that fires in parallel — then flip the graph around to attack your own conclusions. Six templates, EN + 繁中, also a Claude Code plugin.
Excalidraw FiguresHand-drawn article figures from one bilingual spec. Write the figure once in Python, get an editable .excalidraw, an SVG preview, and a Chrome-rendered PNG per language, plus a layout check that fails on overlapping text. Also a Claude Code skill.
iOS KitShared ship-pipeline toolkit for a fleet of iOS apps: idempotent App Store Connect scripts, dry-run by default with read-back verification, and fastlane guards. Private and in development.