How Claude Code Works

1. 0:00 – 0:04

   Intro

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      [upbeat music]

2. 0:04 – 0:19

   Claude Code’s agentic loop: what makes it different from chat

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      We know that Claude Code is different from usual chat applications, but how does it work? Claude Code is best explained through the agentic loop. You enter a prompt into Claude

3. 0:19 – 0:34

   Step 1–2: prompt intake and context gathering via model + tool calls

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      Code. Claude Code will then gather context required to complete your prompt. It does so by interacting with the model, which will return text or a tool call that Claude Code can execute. Then it takes action. For example, editing a file

4. 0:34 – 0:42

   Step 3: taking action in the environment (edit files, run commands)

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      or running a command. Finally, it verifies those results and determines if they achieve what your prompt set out to do in the first place.

5. 0:42 – 0:50

   Step 4: verification and looping until results are complete

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      If they do, then Claude finishes and waits for the next prompt. And if they don't, Claude goes back and

6. 0:50 – 0:57

   Human-in-the-loop controls: add context, interrupt, steer

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      runs the loop again until the results are complete and verifiable. Throughout this loop, you're able to add context, interrupt it,

7. 0:57 – 1:05

   Managed context window: what Claude can remember

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      or steer the model to help guide it towards your end goal. Claude has a context window

8. 1:05 – 1:20

   Automatic compaction: summarizing when you hit context limits

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      which determines how much of your conversation, file contents, command outputs, and more it can store and look back on. Once you reach that limit, Claude Code compacts your conversation, which automatically determines what it could take out of the context window

9. 1:20 – 1:36

   Tools as the backbone of agents (beyond text-in/text-out)

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      and what it can summarize in order to bring the context window back down. Tools are the backbone of how agents work. Currently, most AI assistants are simply input text and output text, nothing in between.

10. 1:36 – 1:46

    How tool usage is chosen: semantic searching for the right call

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       Tools let Claude Code and other agents determine when to execute code to get closer to a task. This could be read file tool or search web tool, for example. Claude Code uses

11. 1:46 – 1:56

    Permission modes: safety controls for edits and commands

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       semantic searching to determine when to call a tool and get the output of it. Claude Code also has permission modes. Default behavior is that it has to

12. 1:56 – 2:06

    Mode switching and trade-offs: Auto-accept vs Plan mode

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       ask explicit permission before editing a file or running a shell command. You can use Shift and Tab to toggle between different modes. Auto accept edits files without asking, but

13. 2:06 – 2:36

    Why caution matters: risks of skipping permissions

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       still ask for commands. Plan mode uses read-only tools to help compile a plan of action before starting. It's worth being cautious when skipping permissions. Giving Claude Code free reign to run commands means a mistake could be harder to catch before it even happens. [upbeat music] Claude Code works by combining different agentic concepts, an agentic loop, a managed context window, tools, and

14. 2:36 – 2:49

    Putting it together: agentic loop + context + tools + permissions in your terminal

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       configurable permissions into your terminal. It can read your code base, take action, and verify its own work, and that makes it fundamentally different from a chat window. [upbeat music]

Episode duration: 2:50