The Best Code Review You'll Ever Get Is From Something That Doesn't Know You're Watching

Codex CLI shows its thinking while it works — not the output, not a summary after the fact, but the actual live internal monologue as it reads a file, decides something is wrong, changes its mind, reads another file, and arrives somewhere.

It's raw. Like, genuinely uncomfortable to read sometimes. It reconsiders. It catches itself making assumptions. It says things like "wait, this doesn't match what I saw in the other file" and goes back.

That's the part that gets you.

Every senior engineer I've learned from has had some version of this voice — the running commentary they do half out loud when they're actually thinking, before they know what they're going to say. The good stuff that never makes it into the PR description or the Notion doc or the talk at the conference. Codex just does it in public, unedited, in your terminal, while your code is the subject.

I've read documentation, I've read books, I've done courses, I've pair programmed with people who are better than me. None of it has been quite like watching something reason through a codebase in real time — not because the reasoning is always right, but because watching someone think is the thing you can almost never actually do.

The output almost doesn't matter. The thinking is the thing.