# Track Specification: Per-Ticket Model Override (per_ticket_model_20260306)

## Overview
Allow user to manually select which model to use for a specific ticket, overriding the default tier model. Useful for forcing smarter model on hard tickets.

## Architectural Constraints
- **Validation**: Selected model MUST be valid and available.
- **Clear Override**: Override MUST be visually distinct.

## Functional Requirements
- **Model Dropdown**: Select model per ticket.
- **Override Flag**: Mark ticket as using override.
- **Clear Indicator**: Visual show override is active.
- **Reset Option**: Remove override and revert to tier default.

## Acceptance Criteria
- [ ] Model dropdown works.
- [ ] Override saves correctly.
- [ ] Visual indicator shows override.
- [ ] Reset returns to default.
- [ ] Override used during execution.