How I Cut 45,000 Next.js Error Tokens to 118 in <0.2ms Using a Rust MCP Server A developer built an open-source Rust Model Context Protocol (MCP) server called Tokenectomy Razor that strips framework internals from error logs and redacts secrets locally before they reach an LLM. The tool reduces a 45,820-token Next.js error dump to 118 tokens in under 0.2 milliseconds, running entirely over stdio with a 3.45 MB memory footprint. It also uses Tree-sitter AST verification to roll back invalid agent-generated code patches, and received a Grade A (4.7/5.0) from Glama.ai's Tool Definition Quality Score audit. If you use Cursor, Claude Desktop, or Cline daily, you have probably watched your rate limits evaporate because of a single runtime crash. A Next.js build fails or a Python script panics, and your terminal vomits 500 lines of stack traces. The LLM eagerly ingests all 45,000 tokens of internal node modules machinery, webpack bundles, and event loop frames. You just paid $0.15 for an AI model to read code it can't edit, your prompt cache is wiped, and your agent is now hallucinating because its context window is full of garbage. Worse, your terminal stderr probably just leaked DATABASE URL=postgres://admin:password@... straight to an external API. I got tired of paying for framework noise, so I built an open-source Rust Model Context Protocol MCP server called Tokenectomy Razor to fix it locally before logs ever touch the LLM. What is eating your context window? A typical Next.js error trace looks like this: text TypeError: Cannot read properties of undefined reading 'digest' at Object.