# 2026-07-06-qwen3-coder-30b-gpt55-version-001

Status: complete.

## Summary

Implemented a polished GPT-5.5 upper-bound artifact for "Interactive Visualization of the Fibonacci Sequence in Nature." The artifact is a self-contained HTML/CSS/JS field guide with interactive canvas visualizations for sunflower phyllotaxis, pine cone scale patterns, and galaxy-like logarithmic spirals.

## Artifact

Entry point: `artifact/index.html`.

## Usage Notes

- Open `artifact/index.html` in a modern browser.
- Use the pattern tabs to switch between sunflower, pine cone, and galaxy views.
- Adjust element count, divergence angle, and growth spacing to see how the golden angle changes visible spiral families.
- Use "Snap to Fibonacci" to jump through Fibonacci counts and "Animate growth" to step through the sequence.
- Hover or tap points in the main visualization for Fibonacci-position readouts.

## What GPT-5.5 Changed

- Replaced the broken source square demo with a working offline phyllotaxis visualizer that preserves the Fibonacci-in-nature concept.
- Added a separate Fibonacci square-and-arc construction so the original sequence logic remains visible.
- Added live measurements for previous/current/next Fibonacci values and the current ratio.
- Added multiple natural examples, responsive layout, and smoke-test-compatible controls.
- Removed the source runtime typo path entirely; no `ffibSequence` reference remains.

## Remaining Limitations

- The natural examples are procedural illustrations, not scientific simulations or measured botanical datasets.
- Spiral count readouts are explanatory approximations based on nearby Fibonacci values rather than image-analysis measurements.
- Canvas rendering is intentionally lightweight so it remains portable in a single offline HTML file.

## Checks

- `python3 scripts/smoke_html.py runs/2026-07-06-qwen3-coder-30b-gpt55-version-001` passed.
- `rg -n "https?://|//cdn|fetch\\(|@import|fonts.googleapis|<link|<img|src=" runs/2026-07-06-qwen3-coder-30b-gpt55-version-001/artifact/index.html` returned no matches.
- A direct `node --check` against the HTML file was attempted first and failed because this Node version does not syntax-check `.html` files directly; the repository smoke test performed the relevant inline script syntax check and passed.