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Developer builds MCP spell-check server to keep AI writing agents style-accurate

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A developer has released language-mcp, a lightweight TypeScript MCP server that gives AI writing agents local spell-checking capabilities without relying on external spelling APIs. The tool currently supports US English and Dutch, using Hunspell with bundled dictionaries — SCOWL/LibreOffice for English and OpenTaal for Dutch — to keep text processing on-device. A fifth tool queries Woordenlijst.org for detailed Dutch lexical information such as pronunciation, word forms, and hyphenation. The server flags potential spelling and style issues but leaves all editorial decisions to the AI agent, deliberately separating dictionary rules from style guidelines and human judgment. The project requires Git, Node.js 20 or later, npm, and Hunspell installed on the host machine, with Linux, macOS, and WSL supported.

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