{"version":"2.1.179","anchor":"claude-design-mcp-integration-gradual-rollout","canonical_anchor":"claude-design-mcp-integration-gradual-rollout","heading":"Claude Design MCP Integration [Gradual Rollout]","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.179\/e\/claude-design-mcp-integration-gradual-rollout","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.179","markdown":"### Claude Design MCP Integration [Gradual Rollout]\n\n**What**\n\nA built-in first-party MCP server called `claude_design` is now available, connecting to Anthropic's Design API at `https:\/\/api.anthropic.com\/v1\/design\/mcp`. When enabled, Claude can mock up UI screens directly in your session. A tip reads \"Use Claude Design to mock up screens before you build.\"\n\n**Status**\n\nControlled by feature flag `tengu_omelette_whisk`. Can also be force-enabled via the environment variable `CLAUDE_CODE_ENABLE_DESIGN_MCP=true`.\n\n**Details**\n\n- Server name `claude_design` is treated as first-party \u2014 it auto-attaches login OAuth tokens and renders with a bare name (no URL prefix in the UI)\n- Setting `CLAUDE_CODE_ENABLE_DESIGN_MCP=1` bypasses the feature flag for self-hosting or testing\n\n**Evidence**\n\nDesign MCP server name (search for `\"claude_design\"`) and URL (search for `\"https:\/\/api.anthropic.com\/v1\/design\/mcp\"`)"}