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Dev2 min reading time

Moonlight & Mayhem (Raccoon Heist by Codex + GPT-5.6 Sol Ultra)

Simon Willison's WeblogPublished Aug 7, 2026

Codex Desktop running GPT-5.6 Sol Ultra created a more advanced version of the Raccoon Heist game originally made with Claude Fable 5, adding complex gameplay and fixing bugs through iterative prompts.

#agentic-software-development #claude-fable-5 #codex-desktop #game-development #gpt-5-6-sol-ultra

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