[FEATURE] Allow hooks to set/switch model automatically (e.g., UserPromptSubmit hook with model routing)

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

That's the right place to push for it. It's a reasonable feature request — auto-routing based on complexity would save real money across all Max/API users.

Proposed Solution

That's the right place to push for it. It's a reasonable feature request — auto-routing based on complexity would save real money across all Max/API users.

Alternative Solutions

That's the right place to push for it. It's a reasonable feature request — auto-routing based on complexity would save real money across all Max/API users.

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_