## ADDED Requirements

### Requirement: Custom shell command execution
The system SHALL support executing user-defined shell commands with full control over arguments and environment.

#### Scenario: Execute custom command with shell
- **GIVEN** useCustomCommand setting is true
- **AND** customCommand setting contains a shell command string
- **WHEN** the server is started
- **THEN** the system SHALL spawn the process with shell: true option
- **AND** execute the exact command string as provided by the user

#### Scenario: Custom command with environment variables
- **GIVEN** customCommand is "FOO=bar opencode serve --port 14096"
- **WHEN** the server is started
- **THEN** the system SHALL execute the command with shell: true
- **AND** the environment variable FOO SHALL be set to "bar"

#### Scenario: Custom command with custom arguments
- **GIVEN** customCommand is "opencode serve --port 9999 --verbose"
- **WHEN** the server is started
- **THEN** the system SHALL execute the command with shell: true
- **AND** pass exactly "--port 9999 --verbose" as arguments
- **AND** NOT append any default arguments (port, hostname, etc.)

#### Scenario: Custom command with wrapper script
- **GIVEN** customCommand is "/path/to/my-wrapper.sh"
- **WHEN** the server is started
- **THEN** the system SHALL execute the wrapper script via shell
- **AND** the wrapper script SHALL have full control of opencode invocation

### Requirement: No validation for custom commands
The system SHALL NOT validate custom commands before execution.

#### Scenario: Invalid custom command fails naturally
- **GIVEN** customCommand is "invalid-command-that-does-not-exist"
- **WHEN** the server is started
- **THEN** the system SHALL attempt to execute it
- **AND** let the spawn fail naturally with ENOENT error
- **AND** NOT perform pre-flight validation

### Requirement: User controls all arguments in custom mode
The system SHALL NOT append any default arguments when using custom command mode.

#### Scenario: User provides complete command
- **GIVEN** useCustomCommand is true
- **AND** customCommand is "opencode serve"
- **WHEN** the server is started
- **THEN** the system SHALL execute exactly "opencode serve"
- **AND** NOT append --port, --hostname, or --cors arguments
