[FEATURE] Switch agent model on invocation

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'd like the option to change the model of an agent upon invocation rather than just rely on the inherit functionality.

I want to avoid having multiple versions of an agent so my context isn't wasted, but also avoid having to do the swap back and forth with /model.

Proposed Solution

Something like this to at invocation time change the model for a that single run: @agent-research:opus @agent-implement:haiku.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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