Open Claude Design: A Weekend Harness Built on Atomic

Anthropic released Claude Design ( https://www.anthropic.com/news/claude-design-anthropic-labs ) on April 17, 2026 — a conversational tool for producing prototypes, slides, and marketing collateral, with a design-system import step, a refinement loop, and a Claude Code handoff bundle at the end. Three days later we shipped open-claude-design ( https://github.com/flora131/atomic/tree/main/src/sdk/workflows/builtin/open-claude-design): an open-source replica implemented as a built-in Atomic workfl