Every LLM App Is Just a Markdown-and-Code Sandwich

📰 Dev.to · Shimo

Learn how LLM apps are built using a simple markdown-and-code sandwich architecture, and why this matters for developers

intermediate Published 16 Mar 2026
Action Steps
  1. Identify the natural language instructions in your LLM app
  2. Layer deterministic code alternately with markdown instructions
  3. Build a prototype using this sandwich architecture
  4. Test and refine your app's performance
  5. Apply this architecture to other LLM app development projects
Who Needs to Know This

Developers and software engineers can benefit from understanding this architecture to build more efficient LLM apps, and product managers can use this knowledge to inform their product strategy

Key Insight

💡 LLM apps are built using a simple, alternating architecture of natural language instructions and deterministic code

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🤖 Every LLM app is a markdown-and-code sandwich! 📄💻

Key Takeaways

Learn how LLM apps are built using a simple markdown-and-code sandwich architecture, and why this matters for developers

Full Article

Rebuilding a local 9B agent's insight feature revealed the same architecture hiding inside Claude Code: natural language instructions and deterministic code, layered alternately like a sandwich.
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