Claude Code Terminal Integration — Running Commands, Seeing Output, Looping
Learn how Claude Code runs shell commands, interprets their output, and iterates — plus how to configure the permission model so it can work autonomously on safe commands while always asking before risky ones.
Quick Reference
- →Claude uses the Bash tool to run shell commands in your project directory
- →Permission modes: ask every time, allow specific commands, or full auto-approve
- →Claude reads command output and decides what to do next — this is the agentic loop
- →Configure allowed commands in settings to let Claude run tests/builds without asking
- →Claude never runs destructive commands (rm -rf, git push --force) without approval
- →Use 'run this command: ...' to tell Claude exactly what to execute
- →Claude's working directory persists between commands within a session
How Claude Code Runs Shell Commands
Claude Code has a Bash tool that lets it execute shell commands directly in your terminal. This is what makes it agentic — it can not only write code but also build it, test it, lint it, and debug it. Every command runs in the same working directory as your project.
When Claude runs a command, it gets back the stdout and stderr output. It reads this output, interprets it, and decides what to do next. If a test fails, Claude reads the failure message and fixes the code. If a build throws an error, Claude reads the error and adjusts. This read-execute-react loop is the core of the Claude Code workflow.