code-mode is a Claude Code plugin that stops flooding Claude's context with MCP results. Claude writes one JavaScript program that calls your MCP tools in a sandbox, filters and joins the data there, and sends back only the answer, instead of many separate tool calls.
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One sandboxed JavaScript program replaces a long sequence of MCP calls.
Data is joined and filtered in the sandbox, and only the answer comes back.
The author measured the same correct answers at lower cost per task.
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