# 2026-07-06-devstral-24b-gpt55-version-001

Status: complete.

## Summary

Implemented a polished, self-contained GPT-5.5 upper-bound artifact for the source concept: an interactive data visualization of global earthquakes. The artifact uses an embedded sample dataset, a local SVG world map, simplified tectonic-plate corridors, dynamic earthquake markers, filters, statistics, a histogram timeline, hover tooltips, and click-to-inspect event details.

## Artifact

Entry point: `artifact/index.html`.

## Usage Notes

Open `artifact/index.html` in a browser. Use the magnitude, depth, time, tectonic setting, and region controls to filter visible earthquakes. Hover markers for quick details, click markers or list rows for the event inspector, click histogram bars to move the time window, and use the play button to animate the monthly timeline.

## What GPT-5.5 Changed

- Removed all external dependencies from the source implementation: no Leaflet CDN, map tiles, USGS network request, external images, web fonts, or `fetch()`.
- Replaced the broken live-map shell with a self-contained SVG visualization backed by embedded representative earthquake data.
- Added working interaction depth: magnitude/depth/time filters, region and tectonic-setting filters, timeline histogram selection, zoom controls, animation, hover tooltips, event selection, visible-event stats, and a sorted event list.
- Added responsive layout and accessible labels so the artifact remains usable across desktop and narrow screens.

## Remaining Limitations

- The dataset is a curated local sample for visualization and benchmarking, not a live or complete seismic catalog.
- The world map and plate boundaries are simplified approximations rather than GIS-grade geometry.
- Energy values are relative estimates based on magnitude scaling and should be treated as explanatory visual context.

## Checks

- `python3 scripts/smoke_html.py runs/2026-07-06-devstral-24b-gpt55-version-001` passed.
- Manual scan for forbidden external references in `artifact/index.html` found no `src`/`href` HTTP(S) URLs, `fetch()`, CSS imports, or CSS `url(...)` references.