# Open-source work from the Levy Street team. URL: https://levystreet.com/research/open-source/ Updated: 2026-10-19 Public code from the Levy Street team: World of ClaudeCraft, SPAWN D, Tiny Shakespeare CLM and TorchWindow, with licence, status and what each is for. ## Short answer The Levy Street team publishes several public code projects. World of ClaudeCraft, a browser MMO, is MIT licensed. SPAWN D, a pre-alpha control plane for coding agents, is MIT or Apache-2.0. Tiny Shakespeare CLM is source-available with no licence. TorchWindow is team member Jeremy Baron's personal library, MIT licensed according to PyPI. Statuses below are as of 19 October 2026. - World of ClaudeCraft: MIT code, 2,303 stars, 732 forks and 60 contributors on 19 October 2026. - SPAWN D: dual MIT or Apache-2.0, pre-alpha and invite-only. - Tiny Shakespeare CLM has no licence: readable on GitHub, but reuse needs permission. - TorchWindow is Jeremy Baron's personal repository; PyPI and pyproject declare MIT. ## The projects at a glance This page covers four public repositories from Levy Street and its engineers: three in the [Levy Street GitHub organisation](https://github.com/levy-street) and one personal project by a team member. Figures are as of 19 October 2026. | Repository | What it is | Licence | Status | Link | |---|---|---|---|---| | World of ClaudeCraft | A free, classic-era MMO for browser, desktop and mobile, with a Gymnasium environment for training AI agents | MIT for code; name and branding not licensed | Live; v0.44.6 released 9 October 2026; 2,303 stars, 732 forks, 60 contributors | [levy-street/world-of-claudecraft](https://github.com/levy-street/world-of-claudecraft) | | SPAWN D | A control plane for running command-line coding agents such as Claude Code and Codex on machines you own, from a browser or phone | MIT or Apache-2.0, at your option | Pre-alpha and invite-only; 1,116 commits, last on 4 October 2026 | [levy-street/spawn](https://github.com/levy-street/spawn) | | Tiny Shakespeare CLM | A character-level language model written entirely as Python, improved by an AI agent | None: source-available, all rights reserved | Research artefact; last updated 9 May 2026 | [levy-street/tiny-shakespeare-clm](https://github.com/levy-street/tiny-shakespeare-clm) | | TorchWindow | A Python library that shows PyTorch CUDA tensors on screen straight from GPU memory | MIT, as declared on PyPI and in pyproject; no licence file in the repository | Stable at 1.1.0 since 4 November 2022; 12 stars | [jbaron34/torchwindow](https://github.com/jbaron34/torchwindow) | ## What the licence labels mean An open-source licence grants you rights; without one, you have only the right to look. The difference matters if you plan to build on any of this code. - **MIT** lets you use, copy, modify and distribute the code, including commercially, provided you keep the copyright and licence notice. - **Apache-2.0** grants similar rights and adds an explicit patent licence and notice requirements. SPAWN D lets you choose either licence. - **No licence** means default copyright. You can read the code on GitHub and learn from it, but copying or redistributing it needs permission. We call these projects source-available, never open source. TorchWindow is a small edge case: its package metadata declares MIT, but the repository itself has no licence file. If you depend on it, cite the PyPI declaration. ## World of ClaudeCraft [World of ClaudeCraft](/portfolio/world-of-claudecraft/) is Levy Street's largest open-source project. Its first playable version was built in about 48 hours in June 2026 with the Claude Fable 5 coding model; it has since grown through public contribution. - **19,893** commits on the main branch - **3,956** pull requests opened, 2,575 merged - **60** contributors with GitHub accounts - **22** game locales The code is MIT licensed, but the README's licence table is explicit that the name "World of ClaudeCraft", "Levy Street" and the logos are "Not licensed". Media follows CREDITS.md: most is CC0, some art was commissioned or generated with image models, and some purchased class icons "may not be redistributed". One deterministic game core runs the live server, an offline browser world and a headless Gymnasium environment, so researchers can train agents against the real game. Our write-up on [building games with AI](/research/building-games-with-ai/) covers what the project taught us. ## SPAWN D [SPAWN D](/portfolio/spawnd/) runs real terminal sessions on hardware you own and lets you reach them from a browser, phone or desktop app. A small Rust daemon on each machine "dials out" to a control server, so it needs no inbound ports, and coding agents run under their own logins. The README states that SPAWN D "never holds your Anthropic, OpenAI, or other provider keys." The security design is unusually candid. Terminal content travels end-to-end encrypted between your device and your machine, and the threat model treats the project's own servers as an adversary. But the trust document also says: "The current guarantee is narrower than the target", listing data that remains server-readable, and adds that the project does "not use the unqualified phrase 'cannot see your data'". It is pre-alpha: native Windows has not been validated on real hardware and the mobile store listings are not live. It is also an example of AI-built infrastructure. The repository's first commit is authored by "Codex", and that identity accounts for 712 of its 1,116 commits. For the permission model behind tools like this, see our guide to [agent permissions and approvals](/engineering/agent-permissions-and-approvals/). ## Tiny Shakespeare CLM Tiny Shakespeare CLM, by Levy Street's Jeremy Baron, is a language model with no neural network: next-character predictions come from Python rules that a Claude Opus 4.7 agent rewrote over 463 commits. Training-set bits per character fell from 4.7744 to 2.3100. It is the public evidence for our research on [Code Policy Models](/research/code-policy-models/), and the full results and limits are on the [Tiny Shakespeare CLM page](/research/code-language-models/). It has no licence. ## TorchWindow TorchWindow is a 2022 library by [Jeremy Baron](/people/jeremy-baron/), published on his personal GitHub account rather than the Levy Street organisation. Its README describes it as a library "that enables viewing of PyTorch Cuda Tensors on screen directly from GPU memory (No copying back and forth between GPU and CPU) via OpenGL-Cuda interop." That makes it useful for watching image tensors live during training or simulation without slowing the loop down. ```python from torchwindow import Window window = Window(640, 480, name="Torch Window") window.draw(image) # image: CUDA tensor shaped (rows, columns, 4), RGBA ``` Install it with `pip install torchwindow`. Version 1.1.0 is built on PySDL2, PyOpenGL and cuda-python; an earlier 0.1 line from 2020 and 2021 was written mostly in C. ## What is not on this list Two related projects are deliberately excluded. **Pokémon Claude Red**, a browser remake rebuilt by Claude Opus 5.5, has its source on GitHub without a licence and is an unofficial fan project, so it is source-available, not open source. **GTM-Bench** code is published by Blackpearl Group under its own GitHub organisation; Levy Street team members co-authored the paper (see [GTM-Bench](/portfolio/gtm-bench/)), but the repository is not ours to list. ## Before you build on any of these - Read the LICENSE file, or confirm there is none, before copying code - Keep copyright and licence notices in anything you redistribute - Treat names, logos and branding as separately protected, even in MIT projects - Check media credits: code licences do not automatically cover art, audio or icons - Pin versions, especially for pre-alpha software like SPAWN D - Review AI-written code as carefully as any other contribution; our [Claude Code guide](/tools/claude-code/) covers how we do it ## Questions people ask ### Is World of ClaudeCraft open source? Yes. Its code is released under the MIT licence on GitHub, so you can read, fork, modify and host it, keeping the copyright notice. The licence covers code, not the name or branding: the README states that "World of ClaudeCraft", "Levy Street" and the logos are not licensed. Media assets follow the terms in the project's credits file. ### Is Pokémon Claude Red open source? No. Its source code is visible on GitHub, but the repository has no licence, so default copyright applies and reuse needs permission. It is also an unofficial, non-commercial fan project that is not affiliated with or endorsed by Nintendo, The Pokémon Company, GAME FREAK or Creatures Inc. ### Can I use SPAWN D today? Only by invitation. SPAWN D is pre-alpha: the code is public under MIT or Apache-2.0, but the hosted service is invite-only, native Windows has not been validated on real hardware, and the mobile store listings are not live. The README documents what the server can and cannot see. ### What does source-available mean? Source-available means you can see the code, but you have not been granted the rights an open-source licence gives. Without a licence, copyright law's defaults apply: reading and learning from the code is fine, but copying, modifying or redistributing it needs the owner's permission. ### How can I contribute to Levy Street's open-source projects? World of ClaudeCraft accepts pull requests on GitHub and has merged outside contributions since its launch day. Its README asks contributors to add English text only, because the maintainer fills in the other 21 locales before each release. For SPAWN D, start with the repository's issues and design documents. ## Sources - [World of ClaudeCraft repository, README and CREDITS](https://github.com/levy-street/world-of-claudecraft) - [World of ClaudeCraft releases](https://github.com/levy-street/world-of-claudecraft/releases) - [SPAWN D repository and README](https://github.com/levy-street/spawn) - [SPAWN D TRUST.md](https://github.com/levy-street/spawn/blob/master/docs/TRUST.md) - [SPAWN D](https://spawnd.dev/) - [Tiny Shakespeare CLM repository](https://github.com/levy-street/tiny-shakespeare-clm) - [TorchWindow repository](https://github.com/jbaron34/torchwindow) - [torchwindow on PyPI](https://pypi.org/project/torchwindow/) - [Pokémon Claude Red repository](https://github.com/levy-street/pokemon-claude-red) Published by Levy Street (https://levystreet.com), Wellington, New Zealand.