Open Claude Design: A Weekend Harness Built on Atomic
Dev.to AI
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Generative AI
Anthropic released Claude Design 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 ( an open-source replica implemented as a built-in Atomic workflow. Five deterministic phases, the same pipeline ported across three different coding agents (Claude Agent SDK, Copilot CLI, opencode) - roughly 500 lines of typescript orchestration per provider.