GUTS — a fantastic voyage through the alimentary canal

Browser flight-combat game (three.js, zero build step). You pilot ENDO-1, a microscopic probe, mouth → rectum through five anatomically-grounded biomes: ride peristalsis down the esophagus, cross the acid sea of the stomach, thread the villi forest of the small intestine, survive the gas swamps of the colon. Fantastic Voyage × Star Fox × Descent.

• Design: docs/GDD.md · Look: docs/ART_BIBLE.md
• Architecture + contracts: docs/TECH.md
• Asset generation: docs/PIPELINE.md
• How we work (lanes/rounds): docs/PROCESS.md — read this first if you are a lane
• Current round: docs/LANES/ROUND1_INSTRUCTIONS.md

Run it

cd web && python3 -m http.server 8140
# http://localhost:8140            — the game
# http://localhost:8140/?stub=1&dbg=1  — stub world + debug HUD (works from day 0)

No bundler, no npm, no build. ES modules + import map; three.js r175 vendored in web/vendor/ (never CDN — the game must run offline). Before you finish a session: bash tools/qa.sh.

The one-paragraph tech pitch

The whole canal is a spline. World position is (s, θ, ρ) — distance along the canal, angle and radius in the cross-section. Tube walls are chunked extrusions along parallel-transport frames; peristalsis and breathing are vertex-shader displacement (cheap, squishy, everywhere); collision is an analytic radius test (no physics engine). Caverns (mouth, stomach) switch the same controller to free 6DOF. Look is synthetic scanner — dark endoscope void, SEM-style monochrome walls with FLUX-generated detail textures, emissive-coded enemies. Everything is seeded + deterministic, and every asset is optional at runtime — the game boots and plays asset-free with procedural fallbacks.

Hard laws (all lanes)

1. Determinism. No Math.random outside js/core/rng.js. Seeded RNG only. qa.sh greps.
2. Assets are optional. Missing texture/model/audio ⇒ procedural fallback, never a crash.
3. Eyeball everything. Visual work isn't done until a screenshot is in docs/shots/laneX/.
4. Perf budget: ≤300 draw calls, 60 fps on M-series / mid laptop. Measure via window.DBG.
5. Free-first. Local MODELBEAST generation before any paid API; fal.ai is a gated fallback (John's go). See PIPELINE.md.
6. Git: stage only your exact paths, commit + push each session, never git add ..

Deploy

Target: partly.party (static). Not wired yet — when it's time, consult the deploy-map skill and run ship-check first. Origin: ssh://git@100.71.119.27:222/monster/guts.git.