How coding assistants work

0:00 So, this isn't some random vibe coder from Twitter. This is the advice from the experts who actually created Claude Code. So, here's a quick introduction to the entire course. It's organized into four sections. First off, what is a coding assistant? Then, why Claude Code? Then, how to work with Claude Code as your partner? And then, how to get the most out of Claude Code? And each section builds on top of the last. So, if you really watch until the end, you'll have a better understanding of Claude Code than 99% of developers.

0:43 First, let's clarify what is a coding assistant. Now, yes, obviously it's a tool that writes code, but Anthropic goes a lot deeper here. They explain the actual behind-the-scenes of how a coding assistant works. And you can see that on the top right. The coding assistant includes a language model, which has access to a set of tools. And the language model then has these three steps. First, it needs to gather context. Second, it needs to formulate a plan.

1:05 And third, it needs to take an action. And then, repeat these until the task is done. Now, if you look at steps one and three, gather context and take an action, these cannot be done just by the language model reasoning or thinking. The coding agent needs to interact with the outside world, also known as the environment, with what we call tools. So, to gather context, maybe it uses a read file tool to read some files. To take an action, maybe it uses edit file tools to edit the code of the files.

1:28 But either way, it cannot do this just by thinking, just by answering. No, it needs relevant, useful tools to execute these actions. This means that to have a strong coding assistant, you need both a powerful LM, a strong AI model, and also lots of powerful tools that the AI model can use. And here are just some of the tools that Claude Code has. You can see that agent can launch a sub-agent to handle a task, bash run a shell command, edit edit the file, and so on and so forth.

1:51 It has a lots of built-in tools, which is what makes Claude Code very, very powerful. And here are a few examples to show you just how powerful Claude Code really is. First, we have this optimization task that Claude Code was tasked to do with the following prompt. Run benchmarks for the chalk library. For any result that looks slow, find the root cause and fix it. Keep in mind that this is a super