Simon Willison

Game Boy Color on My Conference Badge

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At GitHub Universe, the conference badge features a full‑blown color screen computer. Steve Francia, working with Gemini, has ported a NES emulator and further added support for Game Boy and Game Boy Color, enabling games like The Legend of Zelda: Link's Awakening to run on the badge if a ROM is available. The badge also allows users to flip it upside down and use built‑in touch buttons as a controller.

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Simon Willison
Aug 21

Stop Making TUIs

Stop Making TUIs Thomas Ptacek advocates for building real native user interfaces for even the smallest of personal tools, because coding agents have reduced the cost of getting a usable-enough GUI up and running to almost nothing. I wrote about my vibe-coded bandwidth and GPU monitoring macOS task bar apps back in March , and I'm still using both of those on a daily basis.

Simon Willison
Oct 28

The October inflection point for vibe game development

Simon Willison discusses a new inflection point in October 2026 for creating video games using AI, noting that Claude Opus 5.5 now reliably produces compelling 3D models, music, and especially game design. He reports having successfully "vibe coded" four enjoyable games without inspecting the code, and highlights that the real challenge is now generating novel, delightful concepts that AI alone could not conceive. The author compares Opus 5.5’s fun factor to GPT‑6 Astra, which he finds lacking in that regard.

Simon Willison
Oct 24

battledrones v14: Compass Rose, a four player map

Simon Willison released Battledrones v14, adding a new map called "Compass Rose" that supports four-player online battles with rotational symmetry and up to four AI players. The update modifies the WebSocket multiplayer code to allow up to four human players via share links or QR codes, and introduces new purple and green robot teams alongside existing blue and red designs. A replay demonstrates a four-way AI battle using the "Goliath Armada" mutator, where each side starts with four giant Goliath mech units.

Simon Willison
Sep 26

Kākāpō Party

Simon Willison presented a closing keynote at the WeAreDevelopers World Congress North America, where he showcased a pixel‑art animation of kakapo parrots celebrating a record‑breaking breeding season in 2026. He used Claude Opus 5.5 to generate the animation from Google‑searched kakapo photos, then employed Claude Code with Playwright to record a 15‑second video of the animated HTML5 canvas, which he embedded in his Keynote slide.

Simon Willison
3d ago

llm 0.37.1

Release: llm 0.37.1 A bugfix release for LLM, with contributions from Steven Huang, Tao An, Arjan Mossel, and XQ. Tags: llm