openai/gpt-chat-latest → A (4:1)

Side A adds a new user-visible capability by formatting and displaying existing graph connectivity statistics in the CLI, including density, connectedness, and pluralization, and backs it with unit tests covering connected and disconnected cases. Side B is a small cleanup that removes a redundant zero-ratio guard and updates a test to reflect existing behavior (items/pairs are still registered while zero-weight edges are skipped), which is useful but narrower in lasting impact.