Drum machine · claude-opus-5

Output generated Cost / run $0.2070 Runtime 68.6s

Prompt for this run

Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.

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TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelclaude-opus-5

vendorAnthropic · Claude

harnesspi-agent

generated2026-08-03

METRICS

runtime68.6s

tokens in19k

tokens out6.4k

cached13k

cost / run$0.2070

Transcript · 6 messages

user

Build a 16-step drum machine with a clickable grid for kick, snare, hi-hat, and clap, all sounds synthesized with the Web Audio API, plus play/stop and an adjustable BPM.

assistant

thinking

I'm building a single-file drum machine with a grid layout, synthesized sounds, play and stop controls, adjustable BPM, swing timing, and volume control.

→ write /tmp/ws/index.html (12611 bytes)

toolResult

Successfully wrote 12611 bytes to /tmp/ws/index.html

assistant

thinking

I need to fix a typo in the hover state styling where the border color has a malformed hex value.

→ edit {"path":"/tmp/ws/index.html","edits":[{"oldText":" .cell:hover{border-color:#4a5near}\n","newText":""}]}

toolResult

Successfully replaced 1 block(s) in /tmp/ws/index.html.

assistant

`/tmp/ws/index.html` — done. - 4×16 clickable grid (kick, snare, hi-hat, clap) with beat shading, per-lane clear, and click-to-preview track names - All voices synthesized: sine pitch-drop kick, noise+tone snare, filtered noise hat, multi-burst clap; routed through a compressor + master gain - Play/Stop with lookahead scheduler, BPM 50–200, swing, volume, Clear/Random, keyboard shortcuts (Space/C/R), moving playhead