Fathom

fathom is the public repository for an experimental web-art piece by ks·design: a school of sequined goldfish drifting through painted water that follows the visitor's local time of day.

View the live work at fathom.ks-design.art.

Implementation

• The artwork is one dependency-free page in website/src/index.html, with inline CSS and JavaScript and system fonts.
• The only runtime fetches are the three same-origin fish pictures; the page remains functional if they fail to load.
• The build publishes only explicitly allowlisted files, and the Cloudflare Worker serves those static assets with security headers.
• User-facing motion honors prefers-reduced-motion, and the controls use native accessible elements.
• The required Codex Review check validates native review evidence using only default-branch policy; see testing for the dispatch path.

Structure

website/
├── src/index.html       # the page: inline CSS, JavaScript, engine
├── src/fish-0?.webp     # the three painted fish
├── scripts/             # build and local preview
├── tests/               # shipped-output and policy tests
├── worker/index.ts      # security headers for static assets
└── wrangler.json        # deployable Worker configuration