improvement: always show default value for CLI args (hide if default is None)

[mscolnick]

This cleans up some code without changing the CLI help all that much (and i think including defaults is better).

Examples below:

Usage: marimo edit [OPTIONS] [NAME] [ARGS]...

  Create or edit notebooks.

    * marimo edit               Start the marimo notebook server

    * marimo edit notebook.py   Create or edit notebook.py

Options:
  -p, --port INTEGER              Port to attach to.
  --host TEXT                     Host to attach to.  [default: 127.0.0.1]
  --proxy TEXT                    Address of reverse proxy.
  --headless                      Don't launch a browser.
  --token / --no-token            Use a token for authentication. This enables session-based authentication. A random token will be generated if --token-password is not
                                  set. If --no-token is set, session-based authentication will not be used.   [default: token]
  --token-password TEXT           Use a specific token for authentication. This enables session-based authentication. A random token will be generated if not set.
  --token-password-file TEXT      Path to file containing token password, or '-' for stdin. Mutually exclusive with --token-password.
  --base-url TEXT                 Base URL for the server. Should start with a /.  [default: ""]
  --allow-origins TEXT            Allowed origins for CORS. Can be repeated. Use * for all origins.
  --skip-update-check             Don't check if a new version of marimo is available for download.
  --sandbox / --no-sandbox        Run the notebook in an isolated environment, with dependencies tracked via PEP 723 inline metadata. If already declared, dependencies
                                  will install automatically. Requires uv.
  --trusted / --untrusted         Run notebooks hosted remotely on the host machine; if --untrusted, runs marimo in a Docker container.
  --watch                         Watch the file for changes and reload the code when saved in another editor.
  --skew-protection / --no-skew-protection
                                  Enable skew protection middleware to prevent version mismatch issues.  [default: skew-protection]
  --timeout FLOAT                 Enable a global timeout to shut down the server after specified number of minutes of no connection
  --session-ttl INTEGER           Seconds to wait before closing a session on websocket disconnect. If None is provided, sessions are not automatically closed.
  -h, --help                      Show this message and exit.
  

Usage: marimo edit [OPTIONS] [NAME] [ARGS]...

  Create or edit notebooks.

    * marimo edit               Start the marimo notebook server

    * marimo edit notebook.py   Create or edit notebook.py

Options:
  -p, --port INTEGER              Port to attach to.
  --host TEXT                     Host to attach to.  [default: 127.0.0.1]
  --proxy TEXT                    Address of reverse proxy.
  --headless                      Don't launch a browser.
  --token / --no-token            Use a token for authentication. This enables session-based authentication. A random token will be generated if --token-password is not
                                  set. If --no-token is set, session-based authentication will not be used.   [default: token]
  --token-password TEXT           Use a specific token for authentication. This enables session-based authentication. A random token will be generated if not set.
  --token-password-file TEXT      Path to file containing token password, or '-' for stdin. Mutually exclusive with --token-password.
  --base-url TEXT                 Base URL for the server. Should start with a /.  [default: ""]
  --allow-origins TEXT            Allowed origins for CORS. Can be repeated. Use * for all origins.
  --skip-update-check             Don't check if a new version of marimo is available for download.
  --sandbox / --no-sandbox        Run the notebook in an isolated environment, with dependencies tracked via PEP 723 inline metadata. If already declared, dependencies
                                  will install automatically. Requires uv.
  --trusted / --untrusted         Run notebooks hosted remotely on the host machine; if --untrusted, runs marimo in a Docker container.
  --watch                         Watch the file for changes and reload the code when saved in another editor.
  --skew-protection / --no-skew-protection
                                  Enable skew protection middleware to prevent version mismatch issues.  [default: skew-protection]
  --timeout FLOAT                 Enable a global timeout to shut down the server after specified number of minutes of no connection
  --session-ttl INTEGER           Seconds to wait before closing a session on websocket disconnect. If None is provided, sessions are not automatically closed.
  -h, --help                      Show this message and exit.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Feb 9, 2026 10:15pm

[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.19.10-dev21