## ADDED Requirements

### Requirement: Tool instance can have selected profile
The system SHALL allow setting an explicit config profile on a tool instance.

#### Scenario: Assign profile to instance
- **WHEN** user sets selected_profile_id on a tool instance
- **THEN** the instance stores the profile ID and uses it at launch time

### Requirement: Tool instance uses default profile when none selected
The system SHALL resolve a default profile for a tool instance when no explicit profile is selected.

#### Scenario: Fallback to user default
- **WHEN** a tool instance has no selected_profile_id
- **THEN** the system uses the user's default profile for that tool type, or the global default

### Requirement: Remove legacy auto-mount behavior
The system SHALL no longer auto-mount the active config folder at tool launch time.

#### Scenario: Launch without active folder
- **WHEN** a tool instance launches with no selected profile and no default
- **THEN** the instance starts without mounting any config folder