Dev Tutorial: Build a Local Agentic AI CLI Tool Using Python and Raw OpenAI SDK

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A hands-on developer guide walks through building a small command-line AI agent in Python without relying on frameworks like LangChain. The project reads unstructured server log files, uses a large language model to generate a summary, and then autonomously writes and executes a cleanup script based on its findings. The tutorial uses the raw OpenAI Python SDK and standard subprocess calls, and supports local models via Ollama as a free alternative to the OpenAI API. It introduces the concept of tool use, or function calling, as the mechanism that distinguishes a basic generative AI app from an agentic one. The guide targets developers already familiar with AI tools who want to move beyond simple API wrappers and understand agentic workflows at a foundational level.

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ProgrammingDEV Community ·

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