Terminal Agent
ELI5 - The Vibe Check
A terminal agent is an AI that lives in your command line instead of a chat window in a browser tab. It reads files, runs shell commands, edits code, and reports back, all inside the terminal you already work in, rather than making you copy-paste code snippets back and forth between two windows all day.
Real Talk
A terminal agent is a coding agent that operates directly within a command-line interface, with tool access to the filesystem, shell, and version control of the local or remote environment it's running in. Claude Code, Codex CLI, and Aider are examples, contrasted with IDE-embedded assistants or purely chat-based tools that can only suggest code rather than execute it.
When You'll Hear This
"I live in a terminal agent now, I barely open the IDE anymore." / "A terminal agent can run your test suite; a chat window can't."
Related Terms
Agent Harness
The agent harness is the exoskeleton around a raw model. On its own, an LLM is just a very smart text predictor sitting in a box.
Bash
Bash is the most common shell — the language your terminal speaks by default on most Linux and older Mac computers.
Claude Code
Claude Code is Anthropic's agentic coding tool that lives in your terminal.
CLI (Command Line Interface)
CLI is just the fancy term for any tool you use by typing commands instead of clicking buttons.