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On October 24, 2026, Simon Willison released Battledrones v14, adding a new four-player map, Compass Rose; previously, maps only supported two-player matches. According to the same report, Claude Opus 4.5 generated this four-fold rotationally symmetric map and modified the WebSocket multiplayer networking code to support up to four players joining via a shared link or QR code, with empty slots filled by AI; the new faction uses purple and green robots and coexists with the original blue and red teams. On October 25, reports said Simon Willison demonstrated using a single English prompt to have Claude Opus 5.5 add a four-player battle map to a web game and rework the networking code; the prompt gave only four constraints—four-fold rotational symmetry, up to four AI players, based on the existing WebSocket non-audio online mode, and empty slots filled by AI—without specifying files or lines of code.
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Simon Willison used a single prompt to have Claude Opus 5.5 add a four-player battle map to a web gameDevelopments
2 confirmed developments
Simon Willison demonstrates getting Claude Opus 5.5 to overhaul a game with a single prompt
Source:Ayi AI Notes- Source:Simon Willison
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Oct 25
Ayi AI Notes
Simon Willison used a single prompt to have Claude Opus 5.5 add a four-player battle map to a web game
Django co-creator Simon Willison used a single English prompt to have Claude Opus 5.5 add a four-player battle map to his web game and rework the networking code to support four-player multiplayer. The prompt gave only four constraints—four-way rotational symmetry, at most four AI players, building on the existing WebSocket non-audio multiplayer mode, and empty slots filled by AI—without specifying files or lines of code. Based on this, the author argues that prompts should include fewer steps and pin down the boundary conditions.
Oct 24
Simon Willison
Battledrones v14 released: new four-player map Compass Rose
Simon Willison has released Battledrones v14, adding the new four-player map Compass Rose; previously maps only supported two-player battles. Claude Opus 4.5 generated this four-way rotationally symmetric map and modified the WebSocket multiplayer networking code to support up to four players joining via a shared link or QR code, with empty slots filled by AI. The new faction uses purple and green robots and coexists with the original blue and red teams.
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