javascript

WebLLM is a high-performance in-browser LLM inference engine that runs locally in the browser with WebGPU acceleration. It exposes an OpenAI-compatible API, supports streaming and JSON mode, and includes examples for building chat apps and browser extensions.

A React mini-arcade component for turning loading screens into playable one-button games while long tasks run. It includes multiple game modes, skins, score tracking, achievements, and simple props for embedding in apps.

A macOS utility for customizing the native Slack app by injecting CSS and JavaScript, hiding Slackbot, upsells, tabs, and other UI elements in real time.

A Microsoft Word task pane add-in that embeds a Pi Agent-powered assistant for M365 Word, with production and local sideloading manifests plus build and test instructions.

A source-available JavaScript browser agent for asserting end-to-end behavior in real user sessions. The repo explains the annotation-based approach, how it runs in staging and production, and how to install and initialize it via CDN or npm.

Rapunzel is an open-source desktop app for managing agent sessions in a tree-style terminal interface. The README explains its purpose, install steps, launch commands, build instructions, and the core features: branchable terminal sessions, workspace persistence, and session management actions like rename, move, collap

Pure Effect is a small JavaScript library for building testable business logic as data-driven commands instead of relying on mocks. It includes primitives like Success, Failure, Command, Ask, Retry, and Parallel, plus helpers like effectPipe and runEffect for composing and executing flows.

A small JavaScript utility that bulk deletes Claude.ai conversations from the web UI by calling the internal API. The README explains why it exists, how to run it in the browser console, and warns that deletion may take several minutes.