id: task-25 title: 'CLI: Export Kanban board to README' status: Done assignee: [] created_date: '2025-06-09' updated_date: '2025-06-09' labels: [] dependencies: []

Description

Implement new command backlog board export to append the board to README.md or specified output file.

Acceptance Criteria

• [x] backlog board export writes the kanban board to README.md if it exists.
• [x] Provide --output <path> option to save board to another file.
• [x] Automatically create the file if the specified path does not exist.
• [x] Appended content preserves existing file contents and adds the board at the end.

Implementation Notes

• Added exportKanbanBoardToFile() in src/board.ts to handle writing the board to a file.
• New board export command in src/cli.ts gathers tasks (including remote) and uses this helper.
• Supports --output option and defaults to README.md.
• Ensures output file exists and appends the board while preserving content.