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Claude Code

Also: Claude Code CLI

Claude Code is a command-line tool that brings Claude directly into your development workflow. You run it in your terminal, point it at a codebase, and Claude can read files, write code, run commands, and navigate your project — all in conversation. It's Claude as a pair programmer that can actually see and touch your work, not just read what you paste in.

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In practice

You're building a feature and open your terminal. You type your goal — "add pagination to this API endpoint" — and Claude Code reads your codebase, writes the changes, runs the tests, and fixes the failures, all without you specifying each step. It's Claude operating as a software engineer inside your actual project.

Related concepts

Where Claude Code shows up

8 articles

They are different tools for different jobs. The web app is for thinking, writing, and analysis. Claude Code is for working inside your codebase. Here is the decision guide — including when neither is the right answer.

Implementation guide·Claude Code vs. the web app: which one should you use? →·5 min

Claude Code is a different product from Claude.ai — it is an agentic coding tool that runs in the terminal. Here is what it does and when it makes sense.

Role-Specific·Claude Code: what it is and whether your engineering team should use it →·5 min

Engineers are often the last team to adopt Claude, and the first to find the most interesting uses once they do. The field note on what actually works — beyond autocomplete.

Field Note·Claude for engineering teams: beyond the obvious →·6 min

On April 30, 2026 Anthropic moved Claude Security from research preview into public beta for Claude Enterprise. It scans repositories for vulnerabilities, traces data flows across files, and writes patches you can review and apply. Here's what it does, who it's for, and where it fits next to existing security tools.

update·Claude Security: vulnerability scanning and patches for your codebase →·7 min

Anthropic's new `claude agents` CLI mode lets you fire off independent tasks simultaneously and navigate between them — turning Claude Code into a proper multi-agent terminal environment.

update·claude agents: run multiple tasks in parallel from the terminal →·5 min

Shipped with Opus 4.8 as a research preview, Dynamic Workflows let Claude write a multi-step plan and fan it out across tens to hundreds of subagents running in the background. It's built for work one context window can't hold — codebase-wide migrations, sweeping audits. Here's what it is, how it differs from sub-agents and Agent Teams, and when it's worth the token bill.

update·Dynamic Workflows in Claude Code: when Claude orchestrates its own agent swarm →·7 min

Anthropic planned to move programmatic usage (Agent SDK, `claude -p`, Code GitHub Actions, third-party agent apps) off subscription limits and onto a separate metered credit on June 15, 2026. On June 15, it cancelled the change. Nothing changes for now: those surfaces still draw from your Pro, Max, Team, and Enterprise limits exactly as before. Here's the full story, why it matters, and what to watch for next.

update·Claude's June 15 billing change — cancelled before it took effect →·6 min

Six changes landed on the Claude API and in Claude Code in June 2026 that affect how you build and what you pay. Rate-limit tiers were consolidated and raised, fast mode started winding down for older Opus models, the code execution tool gained persistent state, and Claude Opus 4 and Sonnet 4 were retired. Here is each one, the date, and what to do about it.

update·What changed for Claude developers in June 2026 →·6 min