What would you like to be added?

I would like gemini-cli to provide a CLI reference similar to Claude Code, with a clear listing of all commands, options, and parameters, each with appropriate descriptions.

• Claude Code: https://code.claude.com/docs/en/cli-reference
• Codex: https://developers.openai.com/codex/cli/reference/

For example, for the --model parameter, clearly list all available values (such as gemini-2.5-pro, gemini-2.5-flash, etc.), and add notes for any aliases so users can refer to a complete official reference instead of having to experiment.

Please document all supported gemini-cli parameters, options, aliases, and command usages; markdown tables or documentation are preferred.

Why is this needed?

Currently, the Gemini CLI documentation does not fully list all available commands and parameters, nor does it mention any supported aliases. This is not user friendly. Claude Code provides a complete command and parameter value reference with explanations that greatly improves user onboarding. I hope Gemini CLI can also include such documentation to reduce the learning curve and make the tool more usable and clear.

Additional context

In the Claude Code documentation, the --model parameter is clearly explained, including all supported model aliases such as "sonnet", "opus", etc. However, gemini-cli only mentions --model without specifying the full list of supported values, which makes it difficult for users to quickly understand the options.

For example:
--model gemini-2.5-pro
--model gemini-2.5-flash

I suggest officially documenting all CLI options, parameters, and their supported values with detailed explanations.