Solo dev ships national park sim with Claude in 6 months, Opus spawned 560 Haiku subagents to translate it
idun0 · reddit · 2026-10-27
A developer shares Switchback, a voxel-style national park building sim (think Roller Coaster Tycoon for hiking trails), built with Claude over 6 months and hundreds of hours — now free on iOS/Android with 30 levels and expansion packs.
AI workflow highlights:
- Claude 5.5 for asset generation: nested skills + per-asset-type standing requirements; every asset passes at least 5 checks (completeness, correctness, interactivity, seed variability, charm) before a spec-comparison product sheet reaches the human
- Claude built its own testing pipeline: viewing/hearing pipelines, performance analyzer, auto-checks for misplaced angles, ignored world units, and subagents reinventing existing components
- Opus High spawned 560 Haiku 5.5 subagents to translate every string for full i18n in a couple of hours, using 1% of a 20x plan's weekly usage
- Each map carries dense world metadata (heightmap, steepness, biome, wetness, temperature, lat-long...), which the author argues is only manageable solo thanks to AI
A month-one vs month-six comparison video of the same level is included.
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