Codex's slash commands are control actions inside a session, and their full set depends on the runtime. Commands can be OS-only, account-only, catalog-driven and experimental, so some of them may be absent for you specifically. The most accurate source is slash autocomplete in a live session, reflecting your surface and version. This reference gives a map of the most-used built-in commands; the full list reflects the official reference at the cutoff date and changes with the product.

Diagnostics and state commands answer the question "what is in play now". /status shows the model, permissions, directories and context; /debug-config the order and sources of the config layers; /diff the working-tree changes; /mcp the state of MCP servers; /hooks the source and trust of hooks. Almost any diagnosis starts with them: look at the actual state first rather than guessing about it.

Session and work management commands lead the work cycle. /plan switches to planning mode; /new, /resume, /side manage sessions; /compact compresses the history; /review starts a review; /copy carries the result outward. Permission and model commands - /permissions, /model - change boundaries and the model choice on the fly. And extensions and interface setup - /ide, /skills, /plugins, /statusline, /theme, /personality - attach context and configure presentation.

It helps to gather the most-used commands into a table by group once. Below is the map. It is worth using with a caveat: a command's presence here does not guarantee it exists on your surface and version, and its absence does not mean it does not exist at all - skills and MCP add their own. Verify the actual menu with autocomplete, and check fast-changing and cloud commands against the official documentation before building a process on them.