Revive Loop Machine as the LM-919 - #42
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Rewrite the app in TypeScript on React 19 and Vite, with pnpm only. - One session document drives everything: UI dispatches pure commands, the store keeps undo history, and the share link (v2) is rewritten on every change. - New Web Audio engine: a worker-ticked clock that keeps time in background tabs, synthesized 808 kick, 909 snare, and disco open hat with per-drum delay and decay, a stereo unison arp synth, a kick-triggered pump, a ping-pong delay, and a glue bus with headroom. - New LM-919 panel: TR-909 identity pieces (cream LED step keys, chrome knobs, red 7-segment tempo, Michroma nameplate) on modern surfaces, a piano keyboard with key LEDs, octave and chord selectors, six house patterns, and undo. - Replace Jest, Babel, Tailwind, and the old JSX components with Vitest, ESLint, and CSS Modules; CI runs lint, typecheck, test, and build. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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A link naming __proto__ as a drum made decoding write knob values onto Object.prototype. Only accept ids the session actually has. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- Links from the previous app (<steps>_<knobs>_<bpm>) now load their beat, volumes, and tempo instead of a blank machine. - The tempo arrows and black piano keys get a focus ring that shows on their dark surfaces. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Links from Jul-Dec 2025 used a shorter knob part and opened a blank machine. Like the previous app, load the steps from any <steps>_<knobs>[_<bpm>] link, and read volumes only from the layout that carries them. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Human comments
What was wrong
Loop Machine was a JavaScript/Tailwind prototype with dated visuals and thin, clipped synthesized sounds. It also carried leftover Jest, Babel, npm, and dev-toolbar tooling.
What changed
?s=2~…) now encode the whole session, including the new controls.How you verified
b7547b5. RunObject.prototype; a regression test covers it.P2 follow-ups from the review (not fixed here)
public/still deploy; README lists old knobs.Screenshots
Before:
8919665· After:344a67a(the headb7547b5only adds link decoding) · Captured at 2× in Chrome for TestingBB-Thread-ID: thr_d58s3peww2
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