Why I skipped LangChain Every AI agent tutorial I found did one of two things: Either it...
Developer built ecommerce AI agent for order/refund/support without LangChain; core: while loop of LLM calls, tool-use filtering, result feeding. Tech leaders: this clarifies why agent frameworks are optional—clean architecture (Factory pattern, single-file tools) scales organically.
Why I skipped LangChain
Every AI agent tutorial I found did one of two things:
Either it used LangChain, which abstracts away the exact thing you need to understand or it was so simple it was basically a chatbot with if/else routing and called itself an "agent."
I wanted to understand what an agent actually is at the code level. So I built one from scratch.
Turns out the whole thing is a while loop.
What is LangChain? It's the glue that connects large language models with tools — you write a few...
LangChain agents are built on LangGraph: the model calls tools in a loop until it returns a final...
I'd used ChatGPT and Claude as a regular user for a while, but I had no idea what it actually takes...
In a recent audit, a team showed me an AI assistant they'd built on top of their company knowledge...
🙋 I’m Luhui Dev, a developer who has been breaking down Agent engineering and exploring how AI can...
After building production multi-agent systems, I found that reliable agents share the same 7 fundamental patterns. No LangChain…
