Feature Request: Add placeholder support in Commands

[Zim-Inn]

Description

It would be useful to add support for placeholders in the user commands feature.

For example, a user may create a file /commands/send_email.md that describes an email template. This Markdown file could contain placeholders such as ${recipient} or ${cc}. These values often cannot be reliably extracted from the conversation context by the AI and instead require user confirmation or manual input.

Proposal

Allow users to mark parameter placeholders in the Markdown document with a defined format. Placeholders should be categorized into two types:

• auto: Values are automatically extracted by the AI from the workspace context, but must still be confirmed by the user. If the user rejects the auto-suggested value, they should be able to manually input it.
• input: Values are directly filled in by the user through a form input.

Sample Syntax

Here is an example of how placeholders could be defined in Markdown:

# Send Email Command

Please send an email with the following details:

- Recipient: ${recipient:auto}
- CC: ${cc:input}
- Subject: ${subject:input}
- Body: ${body:auto}

[Amolith]

String placeholders are already implemented with syntax $PLACEHOLDER. Auto vs input is definitely not though; you're currently expected to fill the placeholders in yourself.