Introduction
What Is LLM Layer Engine?
Building LLM-powered apps in Node.js means you constantly repeat the same setup — provider wiring, tool execution, retry logic, memory management, permission gates.
LLM Layer Engine solves that. It is a modular engine you drop into your LangChain + TypeScript project and start using immediately.
The Problem It Solves
Every AI agent project runs into the same issues:
- You write a ReAct loop from scratch every time
- Tool registration has no standard shape
- Memory is just a plain array you manage yourself
- Retry logic is copy-pasted across files
- Permissions and approvals have no clean abstraction
LLM Layer Engine gives each of these a dedicated, typed module so you spend time on your product — not plumbing.
Who This Is For
This library is for backend engineers building with:
- LangChain (TypeScript SDK)
- Node.js (v18+)
- TypeScript (strict mode supported)
Design Philosophy
- Every module is independently importable — use only what you need
- All types are exported from a single entry point
- Nothing is opinionated about your LLM provider — you bring your own
- No magic, no hidden state — everything is explicit
Next Step
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