Claude Code: Agentic Coding CLI

Claude Code: Agentic Coding CLI

Claude Code is Anthropic's terminal-based coding agent. Unlike editor plugins or AI-native IDEs, it runs directly in your terminal — no new editor to learn, no GUI required.

How It Works

Launch Claude Code in a project directory. It reads your repository structure and source code, then you give it a task in natural language. It:

1. 1.Plans the approach, describing intended steps before acting
2. 2.Edits files using precise, reviewable changes
3. 3.Runs commands — tests, builds, linters — with your permission
4. 4.Iterates based on output, fixing failures automatically

Claude Code asks for confirmation before consequential actions. You configure how much autonomy it has via permission settings.

Key Slash Commands

• /cost — shows token usage and estimated dollar cost for the session
• /clear — resets conversation context
• /compact — compresses history to reduce token usage
• /init — generates a CLAUDE.md file with project-specific instructions

CLAUDE.md: Persistent Context

Place a CLAUDE.md in your project root. Claude Code reads it at the start of every session — tech stack, coding conventions, testing approach, project-specific instructions. Eliminates re-explaining your setup every session.

MCP Integration

Claude Code supports the Model Context Protocol (MCP), Anthropic's open standard for connecting AI to external tools. Through MCP, Claude Code can interact with databases, APIs, documentation systems, and custom internal tools.

Pricing

Per-token via your Anthropic API key — no flat fee. A typical session on a medium-complexity task costs $0.50–$3.00. Monitor with /cost. Heavy daily use typically runs $50–$150/month.

When Claude Code Shines

• Large, multi-file refactors needing fine-grained review
• Tasks requiring shell commands as part of the workflow
• Projects with a detailed CLAUDE.md
• Terminal-first developers