Codex CLI 0.164 adds /presets slots, inline /model and /permissions, and enterprise MCP sign-in

Released Oct 23, it saves reusable prompts and slash commands in ten numbered /presets slots, lets you set model, reasoning effort, and permission profiles inline with /model and /permissions, and authenticates enterprise MCP connections via Codex account grants or dedicated sign-in. It also masks credentials in remote Bash and Zsh snapshot sessions and stops failed compaction from leaving partial summaries in history.