The text explores the concept of Large Language Model (LLM) agents, likening their development to learning to ride a bicycle—an experience that reveals their true nature beyond theoretical understanding. The author emphasizes the simplicity and educational value of creating an agent, using Python and the OpenAI API as examples to illustrate basic principles. Through a series of examples, including a rudimentary LLM application and tool integration, the author highlights the ease with which agents can be constructed, while also touching on the evolving field of context engineering, which involves managing the fixed token space within the context window. The narrative underscores the open-ended nature of agent design, where experimentation and iteration can lead to significant insights, and encourages readers to engage with this technology hands-on to truly grasp its potential and limitations, suggesting that the exploration of LLM agents presents a valuable opportunity to address open software engineering challenges.