Show HN: Flompt – Visual prompt builder that decomposes prompts into blocks

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13 hours ago

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Anthropic's research shows prompt structure matters more than model choice. Flompt takes any raw prompt, decomposes it into 12 typed blocks (role, context, objective, constraints, examples, chain-of-thought, output format, etc.), and compiles them into Claude-optimized XML.

Three interfaces: web app (React Flow canvas), browser extension (injects into ChatGPT/Claude/Gemini toolbars), and MCP server for Claude Code.

Stack: React + TypeScript + React Flow + Zustand, FastAPI + Claude API backend, Caddy.

Free, no account, open-source. Demo: https://youtu.be/hFVTnnw9wIU