Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Animated snowman in one self-contained HTML file

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  "result": "I wrote `snowman.html` in the working directory. It's about 7 KB and passes the static checks I could run here. I did not open it in a browser, so the screenshot-difference check is unverified.\n\nThe scene is an inline SVG with no JavaScript:\n- **Falling snow:** 26 flakes fall on infinite CSS loops, some drifting side to side.\n- **Snowman:** three snow balls with a hat, carrot nose, smile and buttons. The whole figure bobs gently.\n- **Waving arm:** the right arm rotates back and forth on an infinite loop.\n- **Blinking face:** both eyes blink about every 4 seconds.\n- **Sun:** a yellow sun with a pulsing glow and two dripping \"melt\" shapes.\n\nChecks against the spec:\n- **Size:** 7,146 bytes, well under 100 KB.\n- **No external references:** a grep found no `http(s)://`, `//`, `@import`, `fetch(`, `XMLHttpRequest`, `WebSocket`, `EventSource`, `sendBeacon`, `<script`, `<link` or `url(`. I left out the SVG `xmlns` attribute on purpose, since inline SVG in HTML doesn't need it.\n- **Animation:** `@keyframes` plus `animation` properties are present.\n- **Infinite loops:** every animation uses `infinite`.\n- **Required id and title:** `id=\"snowman\"` is on the `<svg>` element, and the `<title>` is \"Snowman\".\n\nI did not run the headless-browser check, so whether the screenshots at 1.5 s and 2.5 s differ is unconfirmed. The falling snow and waving arm should make them differ, but I haven't seen it render.\n\nThis isn't a git repository, so I did not commit anything.",
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