| Host | The Mac the iPhone connects to. One Mac is treated as one Host. |
| Bridge | The service that connects the iPhone to Codex on the Mac. It handles the connection, Project list exchange, and thread data transfer. |
| Pairing | The first step that imports the Mac connection information into the iPhone. QR is the usual path. |
| Project | The unit of workspace selection on the iPhone. Only items registered on the Mac or added from the iPhone appear here. |
| Thread | One complete conversation with Codex. It keeps the flow and history together. |
| Composer | The input box on the iPhone where you write requests and follow-up instructions. |
| Work Log | The running output that shows what Codex is doing along the way. You can collapse it while reading. |
| Answer | The final user-facing reply from Codex. This is usually the main part you read. |
| Status | The screen or view where you check the current connection state and settings for the Thread. |
| Exec | The feature for sending one one-shot run without switching away from the current Thread. |
| Command | A reusable call you can insert quickly into Composer. |
| Skill | A reusable unit that packages a common procedure or role. |
| Fork | The action that continues the current Thread as a separate branch of conversation while keeping the original intact. |
| Branch | A Git branch. On the iPhone, you can check the current branch, create one, and switch between branches. |
| Follow-up | The way you send another request while work is still in progress. |
| Queue | Send the next request after the current run finishes. |
| Steer | Insert extra direction into the run that is already in progress. |
| Mode | How Codex proceeds. Default is the normal path, while Plan starts from planning first. |
| Speed | The response-speed preference, such as Fast or Flex. |
| Reasoning | The level that controls how deeply Codex thinks, balanced against wait time. |
| Approval | The setting that decides how much confirmation is required before command execution. |
| Code Preview | The screen that opens a source link from an answer and shows part of the file with line numbers. |