15 weeks building a Godot game with Claude Opus: 4GB map bug, perf wins, and Gauntlet-Loop
RUSuper · reddit · 2026-11-09
A solo dev shares week 15 of building the seafaring game Nightshoal with Claude Opus in Godot (free demo available).
This week's results
- Bridge city visuals done: full day/night sun-moon cycle, water reflections, tram, traffic, rotating lighthouse beam (removed red tail lights as it's set in the 1920s)
- Built an in-game performance panel with --perf-log, then had Opus read the logs and write a cost report
Perf wins
- First-dock freeze: 2s → 0.2s; HUD redrew every frame — now 15-19% faster at 1080p
- Map ate 4GB VRAM due to a double-size bug; baking it into tiles cut it to 0.3GB, startup 26s → 13s
- Far harbors now stream in while sailing; 25% less VRAM overall
Workflow
- "Gauntlet-Loop": critic agents blindly compare finished pieces against a ChatGPT mockup; a piece winning twice is final (31/33 won). Added a rule that loops can't delete existing features just because the mockup lacks them (a lighthouse beam got cut once)
- An agent "Jev" picks the effort level per task, usually "extra" for perf work
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