LLM Agents Are Simply Graph – Tutorial for Dummies

Re:LLM Agents Are Simply Graph – Tutorial for Dummies by zh2408 on Wednesday March 19, 2025 @05:29PM (#43417512)

Hey folks! I just posted a quick tutorial explaining how LLM agents (like OpenAI Agents, Pydantic AI, Manus AI, AutoGPT or PerplexityAI) are basically small graphs with loops and branches. For example:

OpenAI Agents: for the workflow logic: https://github.com/openai/openai-agents-python/blob/48ff99bb...

Pydantic Agents: organizes steps in a graph: https://github.com/pydantic/pydantic-ai/blob/4c0f384a0626299...

Langchain: demonstrates the loop structure: https://github.com/langchain-ai/langchain/blob/4d1d726e61ed5...

If all the hype has been confusing, this guide shows how they actually work under the hood, with simple examples. Check it out!

https://zacharyhuang.substack.com/p/llm-agent-internal-as-a-...

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by czbond on Wednesday March 19, 2025 @06:28PM (#43417909)

Thank you - really interesting looking read, thanks for crafting the deep explanation, with links to actual internal code examples. Also, thanks for not putting it behind the Medium paywall

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by zh2408 on Wednesday March 19, 2025 @06:32PM (#43417945)

Thank you!!

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by pseudopersonal on Wednesday March 19, 2025 @08:26PM (#43418733)

Thanks for this write up. It'll be inspiring my ruby framework.

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by zh2408 on Wednesday March 19, 2025 @08:34PM (#43418772)

Thank you!

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by godelski on Wednesday March 19, 2025 @09:03PM (#43418941)

Minor comment: do you mean "LLM Agents Are Simply Graphs". Personally, I'd drop the adjective to "LLM Agents are Graphs" as I think it sounds better, but the plural is needed.

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by zh2408 on Wednesday March 19, 2025 @09:09PM (#43418984)

Oh, that’s embarrassing ... pardon my poor English, and thanks so much for pointing that out!

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by godelski on Wednesday March 19, 2025 @09:26PM (#43419076)

Simple mistake and easy to fix :)

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by bambax on Thursday March 20, 2025 @08:48AM (#43422386)

This explanation and demo is super clear.

It would be interesting to dig deeper into the "thinking" part: how does an LLM know what it doesn't know / how to fight hallucinations in this context?

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Re:LLM Agents Are Simply Graph – Tutorial for Dummies by erichi on Thursday March 20, 2025 @11:14AM (#43424526)

I like the minimalistic approach! How to test such agents?

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