Codex CLI in 10 minutes: a hands-on tour for the curious dev

What Codex CLI actually is I kept seeing Codex CLI show up in my feed and finally gave it a real weekend. Here is the short version: it is a terminal-based coding agent from OpenAI that you can drive from your shell, in your repo, with a single command. If you have used Claude Code, it will feel familiar — but it is a separate product with its own personality. The 5 commands I actually use Command What it does codex Opens an interactive REPL in the current dir codex "fix t...