refinement of upcoming tracks

conductor/tracks/per_ticket_model_20260306/spec.md

@@ -1,21 +1,37 @@
 # 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.
+Allow user to manually select which model to use for a specific ticket, overriding the default tier model.
 
-## Architectural Constraints
-- **Validation**: Selected model MUST be valid and available.
-- **Clear Override**: Override MUST be visually distinct.
+## Current State Audit
+
+### Already Implemented
+- **`models.Ticket`**: Has no model_override field
+- **`multi_agent_conductor.py`**: Uses fixed model per tier
+- **`ai_client.py`**: `set_provider()`, `set_model()` functions
+
+### Gaps to Fill
+- No model_override field on Ticket
+- No UI for model selection per ticket
+- No override indicator in GUI
 
 ## 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.
+- Add `model_override: Optional[str]` to Ticket dataclass
+- Model dropdown in ticket UI
+- Visual indicator when override active
+- Reset button to clear override
+
+## Key Integration Points
+| File | Purpose |
+|-----|---------|
+| `src/models.py` | Add model_override field |
+| `src/gui_2.py` | Model dropdown UI |
+| `src/multi_agent_conductor.py` | Use override at execution |
 
 ## Acceptance Criteria
-- [ ] Model dropdown works.
-- [ ] Override saves correctly.
-- [ ] Visual indicator shows override.
-- [ ] Reset returns to default.
-- [ ] Override used during execution.
+- [ ] Model dropdown works
+- [ ] Override saves correctly
+- [ ] Visual indicator shows override
+- [ ] Reset returns to default
+- [ ] Override used during execution
+- [ ] 1-space indentation