## ADDED Requirements

### Requirement: Terminal tool types can define a startup command

The system SHALL allow tool types to specify a `startup_command` that runs before the interactive shell for each new terminal session.

#### Scenario: Tool type with startup command
- **GIVEN** a tool type with `interface_type` = "terminal" and `startup_command` = "cd /workspace && ls"
- **WHEN** a user opens a terminal session to an instance of this tool type
- **THEN** the startup command executes before the interactive shell starts
- **AND** the user sees the output of the startup command in the terminal

#### Scenario: Tool type without startup command
- **GIVEN** a tool type with `interface_type` = "terminal" and no `startup_command`
- **WHEN** a user opens a terminal session
- **THEN** the interactive shell starts immediately without any startup execution

#### Scenario: Startup command failure does not block shell
- **GIVEN** a tool type with `startup_command` = "exit 1"
- **WHEN** a user opens a terminal session
- **THEN** the startup command runs and fails
- **AND** the interactive shell still starts afterward

### Requirement: Startup command is stored on the tool type

The system SHALL persist `startup_command` as a field on the `tool_types` table.

#### Scenario: Create tool type with startup command
- **GIVEN** a user creating a tool type
- **WHEN** they provide `startup_command` = "source /etc/profile"
- **THEN** the tool type is created with the startup command stored

#### Scenario: Update tool type startup command
- **GIVEN** an existing tool type with a startup command
- **WHEN** an admin updates `startup_command` to a new value
- **THEN** the tool type is updated
- **AND** new terminal sessions use the updated startup command

### Requirement: Startup command is optional

The system SHALL treat `startup_command` as an optional field on tool types.

#### Scenario: Create tool type without startup command
- **GIVEN** a user creating a terminal tool type
- **WHEN** they omit `startup_command`
- **THEN** the tool type is created successfully
- **AND** terminal sessions start normally without a startup command
