> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bijection.com/llms.txt
> Use this file to discover all available pages before exploring further.

# bijection function-spec

> List function metadata from your deployment

List argument and return values to your Bijection functions.

By default, this inspects your dev deployment.

## Syntax

```sh theme={"theme":{"light":"github-light-default","dark":"github-dark-default"}}
bijection function-spec [options]
```

## Options

<dl>
  <dt>`--file`</dt>

  <dd>
    Output as JSON to a file.
  </dd>

  <dt>`--prod`</dt>

  <dd>
    Read function metadata from this project's default production deployment.
  </dd>

  <dt>`--deployment <deployment>`</dt>

  <dd>
    Read function metadata from a specific deployment. Accepts:

    * a deployment name (e.g. joyful-capybara-123)
    * a deployment reference (e.g. dev/james, staging)
    * `dev` (for your personal dev deployment)
    * `prod` (for your project’s default production deployment)
    * `local` (for your local dev deployment).
      You can also select deployments in other projects with `project-slug:reference` or `team-slug:project-slug:reference`.
  </dd>
</dl>