Built Wheel Cheer’s setup studio and transparent overlay, including live data, Twitch predictions, local scores and original pixel art. Source, lockfile and dist/ export are included.

Passed: build, typecheck, 24 logic tests, 17 browser interaction groups and 16 design checks. Delivery size: 852 KB.

README · Design · Validation

WebKit and native OBS audio remain untested.

I found no high-severity problems: no requirement is missing or faked, and every one of the 16 probe checks passed. I wrote 4 findings (2 medium, 2 low) to .imd-findings.json. No repository files were changed.

Limits of this review:

• The probe needed Playwright, so I installed it and its browser in a temp folder outside the repo.
• In my own browser runs the sandbox's proxy blocked the API (the browser reported a CORS error) and the Twitch connection. So I only saw the overlay's "unknown"/reconnecting state in the screenshots.
• To check the API logic, I fetched every endpoint with curl and compared the responses to the code by hand: round number, block height and the fields the result reveal uses.
• I did not do a WebKit pass.

Requirements

• Fully static, no backend, accounts, keys, token or wallet: met. Vite builds a static dist/, and the setup page says "No accounts, keys or wallets needed".
• Reads /v1/status and /v1/economy/state, CORS open, no key: met (src/api.ts). It also reads /core and /measurement/stats for the round start time and the daily distance; the README explains why.
• Polls every 10 s and respects ETag/Retry-After: met (src/api.ts: If-None-Match, retryDelay, backoff when a request fails).
• Shows "unknown", never zero, when a field is missing or freshness is not online: met (makeSnapshot in src/model.ts, and number() returns "unknown").
• Rounds are 600 s; block height = cumulativeBlockUnits / 1e9: met (src/model.ts, done with BigInt). The round number matches the live /core genesis (round 729).
• Setup page: layout (badge, bar, panel), theme (dark, light, clear), accent, scale, widgets, Twitch channel, sound: all met (src/setup.ts).
• Live preview on a fake stream background: met (pixel-art night scene in the preview).
• Copyable overlay URL with every setting in query params: met (overlayUrl in src/config.ts).
• Step-by-step OBS instructions: met (ol.instruction-steps in src/setup.ts:92).
• Overlay has a transparent background and reads the query params: met. Measured body/html background is rgba(0,0,0,0), and readConfig parses the params.
• RPM gauge plus a hamster-on-wheel sprite that speeds up with RPM: met (--wheel-duration = 60/rpm).
• Running/sleeping status: met (ACTIVE shows Running, IDLE shows Sleeping).
• Today's distance in metres: met (/measurement/stats, today's UTC row).
• Block height with a pop and optional sound when it rises: met (cheer(), src/sound.ts).
• Countdown to the end of the round: met (countdown()).
• Anonymous read-only Twitch chat with a justinfan nick: met (src/chat.ts:84,91).
• !run / !sleep vote with a live vote bar: met, with one defect (see finding 1).
• Result reveal from API work, and a per-session top 10 in localStorage: met (ChatGame.ingest/resolve, .result-pop).
• !squeek shows RPM and height for 8 s, rate-limited: met (src/main.ts:100-101, SqueekCooldown).
• Works at 1920×1080 and 1280×720: met. No overflow, and fit() scales to the canvas. The bar layout is too tall, though (finding 2).
• CSS animations, a reduced-motion stop, no trackers, original SVG/CSS art, English UI, accessible contrast: met (the probe's contrast and motion checks passed).
• README explains every query param: met (README.md:45-55).
• No wallet, token or paid service: met.
• "How it uses Squeekchain" section linking to https://squeekchain.com: met (src/setup.ts:93).
• Look (charcoal #1A1A20, amber and mint, pixel font for numbers, sans-serif text, drop shadow): met.
• Hosting and live URL: a