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.

Arrowproof checks architecture diagrams against a repository’s import graph and shows the code evidence behind each arrow. It can verify diagrams, generate reports, create editable diagrams from specs, and run in CI.

Free curriculum for learning AI agents, LLM evaluation, and benchmarking, with 42 lessons, interactive labs, runnable JavaScript, and saved progress.

A repository that uses AI agents to translate arcade game machine code into idiomatic JavaScript and validate the result pixel-for-pixel against MAME. The page shows real project status, test methodology, and examples of completed and in-progress ports.

A browser-based Sokoban game with a client-side AI solver that finds provably optimal fewest-move solutions for most boards and explains how the solver works.

A Swift package for running JavaScript LLM agents inside a Swift app using the XS engine, with snapshot/restore support, resident agents, and confined tool access.

Local-first debugger for LLM agent context windows. It records each call’s context into a single-file trace so you can inspect, diff, and share what the model actually saw turn by turn.

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 browser game experiment where bots are controlled by neural networks and evolved with a genetic algorithm. The 2026 update adds shared server-side evolution, improved bot behavior, and a PHP/SQLite backend.

A Git-based CMS for static site generators, packaged as a pnpm workspace with install, build, test, and demo instructions, plus documentation for usage and configuration.

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.

A Claude Code plugin that wraps MCP tool use in a single sandboxed JavaScript program, reducing tool-call chatter and keeping intermediate results out of context.

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.