[FEATURE] /clear and specify model for next session at once, e.g., "/clear -m sonnet"

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want to /clear and specify the model for the next session at once, so I don't have to run /model immediately after.

For efficient token use, the decision about the model for next task is better to be made the instant I start the session for that task.
After all, command "/clear" is roughly a soft restart of claude, while "claude.exe" does have a "--model" option.

I can just run /model immediately after /clear in the new session, but if I had the option, I could be well reminded of the fact that launching a new session is a proper opportunity to consider switching model: tasks are different in complexity.

Proposed Solution

Something like

/clear --model sonnet
/clear -m sonnet

Alternative Solutions

Run /model in the new session immediatley after /clear.

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_