# Requirements: v1.9 Topic Shell Assembly Decomposition

## Shipped requirements

- **MTN-07**: The topic-shell assembly cluster centered on
  `ensure_topic_shell_surfaces` left `aitp_service.py`.
- **MTN-08**: Maintainability budgets tightened again after the extraction.
- **DOC-08**: Docs and regression coverage now reflect the
  `topic_shell_support.py` boundary.

## Backlog carried forward

- **PUB-01**
- **PUB-02**
- **PUB-03**
