MCP Install fails with "Invalid agent"

[chiplay]

Following the install instructions for MCP in the readme and getting this error.

$ npx -y grab@latest add mc

✿ React Grab 0.1.28

✔ Preflight checks.

Invalid agent: mcp
Available agents: claude-code, cursor, opencode, codex, gemini, amp, ami, droid, copilot

[pullfrog]

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