Ship a Working Prototype Site Over a Weekend

To validate a product idea you do not have to wait for engineering capacity. Using AI generation tools like v0, Lovable, and Bolt, this article walks you through converging the idea into a one-page spec, producing the first version, wiring a database and login, deploying to a shareable link, and putting it in front of real users — and spells out which requirements mean you should stop and find people instead.

A clear account of the Function Calling mechanism in mainstream LLM APIs: how to write a tool JSON Schema, how the model decides whether to call a tool, how to use tool_choice for forced calls and parallel calls — with a complete runnable example, plus practical techniques for how the way you write tool descriptions decides call quality.

Send your first LLM request with Python's openai SDK: understand the division of labor among system, user, and assistant message roles; the trade-offs of temperature, max_tokens, and streaming; token billing concepts and usage estimation; and finally, a troubleshooting guide for the errors every beginner will meet.

Build a development environment that can call an LLM API from scratch: installing Python, virtual environments, getting an API key, and managing environment variables, then verifying the whole chain with a single curl command. Complete commands for both macOS and Windows, with a focus on keeping your key safe and out of git.

Hand-write an Agent that actually does things, without any framework: it checks the weather, does arithmetic, and loops on its own until the task is complete. A step-by-step breakdown of the six steps of the Agent loop, its termination conditions, and the common pitfalls — once you've written it, you'll understand what frameworks do for you.

One real API call dissects the full chain of a question: 35 ms to establish the connection, microseconds to tokenize, 474 ms for the model to read your whole question, 380 ms generating it token by token — 854 ms in total. Includes the complete reproducible measurement method, and one counterintuitive conclusion: 96% of the time is not in the network but inside the model.