Claude Code in a Minute: Getting started

In one sentence

Claude Code is a terminal-based coding agent that works inside your project with files, commands, and iterative task execution.

Why it matters

Most “AI coding” fails at the boundary between suggestion and delivery. An agent that can read the repo, change files, and run checks can finish real work—if you specify the task and verification clearly.

How it works

You run Claude Code in a repository, describe an outcome, and let it explore and edit under your configured permissions. A useful first session usually includes:

1. confirming the working directory is the right repo;
2. stating the desired outcome and out-of-scope items;
3. naming the verification command (npm test, pytest, etc.);
4. reviewing diffs before you accept large or risky changes.

Product details and flags evolve. Prefer current Anthropic docs for install and authentication steps.

Example

A strong first prompt looks like this:

Add a /health route that returns {"ok": true}.
Do not change authentication.
Verify with the existing test suite.
Summarize the diff when done.

Agentic coding use

Treat the first Claude Code session as workflow design, not magic. You are teaching the agent how this repo is built and how “done” is proven. That investment pays off on every later task.

Watch out

Do not paste a vague goal like “improve the codebase.” Vague tasks produce sprawling diffs. Scope one outcome, one verification path, and one review checkpoint.