## ADDED Requirements

### Requirement: Reindex command

The client SHALL provide a `kb reindex` command that triggers re-embedding of all chunks on the engine. The command SHALL prompt for confirmation before proceeding.

#### Scenario: Reindex with confirmation
- **WHEN** the user runs `kb reindex`
- **THEN** the client SHALL display a warning that all chunks will be re-embedded and prompt `Reindex all chunks? This will re-embed everything. [y/N]`. If confirmed, it SHALL POST to `/api/v1/reindex` and display the result.

#### Scenario: Reindex with skip confirmation
- **WHEN** the user runs `kb reindex --yes`
- **THEN** the client SHALL skip the confirmation prompt and POST to `/api/v1/reindex` immediately

#### Scenario: Reindex cancelled
- **WHEN** the user runs `kb reindex` and responds with anything other than `y` or `yes`
- **THEN** the client SHALL print `Cancelled.` and exit with code 0

#### Scenario: Reindex human output
- **WHEN** the reindex completes successfully with default format
- **THEN** the client SHALL print `Reindexed N chunks (model: <model_name>)`

#### Scenario: Reindex JSON output
- **WHEN** the user runs `kb reindex --yes --format json`
- **THEN** the client SHALL output the raw JSON response from the engine