17. Tech-Stack

Backend

• Node.js 22, Express 5
• Drizzle ORM + PostgreSQL
• argon2id (Passwort-Hashing)
• connect-pg-simple (Session-Storage in Prod)
• OpenAI SDK an OpenRouter (LLM-Gateway)
• jsdom + mermaid (SSR-Diagrams)
• multer + Cloudflare R2 (Media)
• BLAKE3 (Cloudflare-File-Hashing)
• tsx (Dev Hot-Reload)

Frontend

• React 18 + Vite 6
• React-Router v6
• CodeMirror 6 (Editor)
• Tailwind CSS 4
• Lucide-React (Icons)
• react-markdown + remark-gfm + rehype-slug

Tooling

• pnpm 9 Workspaces
• TurboRepo (Build-Cache)
• TypeScript 5.8 strict
• esbuild (über tsx)

LLMs (default models, env-überschreibbar)

• Mapper: openai/gpt-5-mini
• Translator: google/gemini-2.5-flash
• Converter (ASCII→Mermaid): anthropic/claude-sonnet-4.5

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