/diff

Shows the current changes (diff) of the session.

/diff is part of the official list of interactive Codex slash commands and shows the changes Codex has made or proposed in the running session. It complements commands like /review, which additionally evaluate the changes.

✅ WHEN TO USE IT?

Quickly check what Codex has changed so far

/diff — after a few work steps, check which files were affected

See the exact line changes before approving

/diff — look at the changes before letting Codex apply them

⛔ WHEN NOT TO?

You need a substantive assessment, not just the raw diff text

/diff shows the changes but doesn't evaluate them.

Better: Use /review to additionally have the changes assessed

SOURCES

Codex CLI Doku: Slash Commands ↗ developers.openai.com