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type-two 1e4775ab12 [lane C] L4 Small Intestine: the long maze — the campaign doubles in length
The first new level since L2, and the campaign's endurance beat. 7 segments, 6000 units,
63 events, ~10 minutes. Authored entirely from systems that already exist — no new engine work.

The three acts are anatomy, not invention: duodenal bulb -> descending duodenum (the ampulla,
where bile enters) -> jejunum -> deep jejunum -> ileum -> terminal ileum -> ileocecal valve.
Giardia really colonises the duodenum/jejunum and Peyer's patches really concentrate in the
ileum, so the difficulty curve IS the gut's own immune gradient: you fly from the quiet
absorptive end into the lymphoid end and the walls get angrier.

Identity vs L2: flow 8-10 against L2's 12-20, curviness up to 0.70, fog 0.050. L2 punishes bad
reflexes; L4 punishes bad reading. Segmentation ring gates (the small bowel's real motility)
teach at 70% open and test at 43% in an 8-unit lumen.

Three catalogue rows carry the new fiction onto existing archetypes — chyme_clump (floater),
neutrophil_hunter (seeker), bifido_colony (flora). The ileocecal biofilm gate at s5500 is the
first time the reputation loop pays out at a level's END rather than mid-level.

C's own tooling verifies it: selfcheck 4/4 valid, and --sim reports par 600s vs par-pace 576s
("par is reachable at par-pace throttle"), a pressure curve of 1.00/1.43/1.90/2.46/1.65/2.69/
1.63, min clearance 3.62 vs the 2.5 law, all 22 checkpoint gaps <= 29.3s. Driven end-to-end
in-engine: all six entity types spawn, biofilm fires at 5500, valve gate completes to L5.

The GDD's Tapeworm miniboss is not here — no boss framework exists yet. It goes in at ~5500
when that lands; the level notes say so.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-25 22:27:41 +10:00
.claude [lane E] The instrument exists: a HUD, and a surgical team who talk to you 2026-07-17 23:01:40 +10:00
docs [lane B+C+F] The biofilm gate: the reputation cash-out, "it helps you in level 5" made real 2026-07-20 00:16:12 +10:00
pipeline [lane A] MODELBEAST dresses the molecules: 5 matcaps, and the canal picks space-filling 2026-07-16 21:31:24 +10:00
tools [infra] Stamp the deploy: curl /gutsy/VERSION to see what is actually live 2026-07-17 23:04:05 +10:00
web [lane C] L4 Small Intestine: the long maze — the campaign doubles in length 2026-07-25 22:27:41 +10:00
.gitignore [lane A] The swept room + the acid sea, built — and it corrected me four times 2026-07-16 18:04:16 +10:00
README.md [infra] GUTS is live at partly.party/gutsy — deploy wired, ship-check clean 2026-07-17 23:02:04 +10:00

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.

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

Live: https://partly.party/gutsy/bash tools/deploy.sh (QA gate → rsync web/ minus dev/docker cp into forum-nginx → verify). No build step; web/ ships as-is.

Two things to know before you touch it, both documented at length in the script header:

  • It's ephemeral. Content lives in the container's own layer (like blobbo/glytch), so a docker compose up --force-recreate or nginx image bump wipes it — re-run the script. The durable fix is a bind mount in forum/docker-compose.yml (what cratewars/roguelike use), which costs a forum-nginx recreate and brief partly.party downtime.
  • A 404 there returns HTTP 200. nginx's catch-all try_files ... /index.html serves the arcade index for any missing file. Verify on content, never on status codes.

Origin: ssh://git@100.71.119.27:222/monster/guts.git.