Porting Doom to the GitHub Universe badge with Copilot in 47 minutes via an agent self-verification loop
martinwoodward · x · 2026-11-13
GitHub's Martin Woodward ported Doom to the GitHub Universe 2026 badge (RP2350B, ST7789 screen, capacitive controls) in 47 minutes for $10 of Copilot credits.
The real lesson is the agent self-verification loop: he pointed a webcam at the badge so the agent could see crash symptoms on screen and debug itself without human feedback.
The write-up covers the setup, tricks novel even to Simon Willison, and what he'd do differently to cut costs next time.
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