> ## Documentation Index
> Fetch the complete documentation index at: https://gofastmcp.com/llms.txt
> Use this file to discover all available pages before exploring further.
# output
# `fastmcp.cli.deploy.output`
Stable terminal and JSON output for Horizon CLI commands.
## Functions
### `emit_device_challenge`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
emit_device_challenge(authorization: DeviceAuthorization) -> None
```
Show a device challenge before polling starts.
### `start_device_approval_status`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
start_device_approval_status() -> Status | None
```
Start the terminal spinner while the browser approval is pending.
### `stop_device_approval_status`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
stop_device_approval_status(status: Status | None) -> None
```
Stop a device approval spinner when one is active.
### `emit_identity`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
emit_identity(command: Literal['login', 'whoami'], user: HorizonUser) -> None
```
Show the authenticated user.
### `emit_environment_logout`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
emit_environment_logout() -> None
```
Explain why logout cannot change an environment credential.
### `emit_logout`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
emit_logout() -> None
```
Show a successful local logout result.
### `emit_error`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
emit_error(command: CommandName, category: ErrorCategory, message: str) -> None
```
Show a stable expected command failure.