## MODIFIED Requirements

### Requirement: Tool Lifecycle

The system SHALL manage tool lifecycle operations including tunnel recreation.

#### Scenario: Stop tool
- GIVEN a running tool instance
- WHEN the user stops it
- THEN `docker compose stop` is executed
- AND the cloudflared tunnel process is terminated
- AND status is updated to "stopped"

#### Scenario: Start tool
- GIVEN a stopped tool instance
- WHEN the user starts it
- THEN `docker compose start` is executed
- AND a new temporary Cloudflare tunnel is created
- AND status is updated to "running"

#### Scenario: Recreate tunnel
- GIVEN a running tool instance with a broken tunnel
- WHEN the user requests tunnel recreation
- THEN the existing cloudflared process is terminated
- AND a new temporary Cloudflare tunnel is created
- AND the instance URL is updated
- AND the instance shows as healthy

## ADDED Requirements

### Requirement: Tunnel Health Check

The system SHALL check tunnel health for running instances.

#### Scenario: Healthy tunnel check
- GIVEN a running instance with an active tunnel
- WHEN the health check runs
- THEN the tunnel URL responds with HTTP 2xx
- AND the instance is marked as healthy

#### Scenario: Broken tunnel check
- GIVEN a running instance with a broken tunnel
- WHEN the health check runs
- THEN the tunnel URL does not respond with HTTP 2xx
- AND the instance is marked with tunnel_error
- AND a "Recreate Tunnel" button is shown
