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Reaction-diffusion · gpt-5.6-luna

Run a Gray-Scott reaction-diffusion simulation on a canvas that grows organic Turing patterns in real time, with the mouse seeding new growth.

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user

Run a Gray-Scott reaction-diffusion simulation on a canvas that grows organic Turing patterns in real time, with the mouse seeding new growth.

assistant
thinking
**Planning index.html creation**

I need to create an index.html file and inspect the directory. I'm thinking about implementing a polished single page application, probably just writing it out. It’s important to ensure everything is performant, using a full-screen canvas with controls like feed/kill presets. I want it to feel organic and include a UI without relying on any external libraries. Maybe I should test the syntax using Node.js to write the file. Let's get started on this!
write /tmp/ws/index.html (8729 bytes)
toolResult

Successfully wrote 8729 bytes to /tmp/ws/index.html

assistant

Created `/tmp/ws/index.html` — a self-contained Gray-Scott reaction-diffusion simulation with: - Real-time organic Turing patterns - Mouse/touch drag seeding - Feed rate, kill rate, and brush size controls - Preset cultures: Coral, Mazes, and Cells - Pause/resume and re-seed controls - Responsive full-screen canvas - No external resources or network requests

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

modelgpt-5.6-luna
vendorOpenAI
harnesspi-agent
generated2026-08-01

EVALUATION

4/5 working

Gray-Scott reaction-diffusion grows organic maze/coral patterns continuously, with click/drag visibly seeding new growth.

Vision grade · anthropic/claude-sonnet-5

MEASUREMENTS

Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.

idle motion28.3%
on click24.3%
on drag36.4%
on wheel2.7%
on enter + space4.0%
on arrow keys1.5%
on w/a/s/d0.7%
frame spread25.9 / 255
console errors0
js errors none

METRICS

runtime23.7s
tokens in6
tokens out3.2k
cached2.3k
cost / run$0.0117