Block Ledger

Block Ledger is a control plane over the block editor — not another block library. It answers three questions content plugins never touch:

• What is in my editor, and where is it used? A usage index built from parse_blocks() across posts, reusable blocks, and Full Site Editing templates.
• What am I allowed to add? Allow/deny blocks globally or per post-type, and lock editor settings per role.
• If I remove or update something, what breaks — and can I undo it? Retire a block type by rendering every in-use instance to portable static HTML, with a one-click restore snapshot.

The safe-deactivation feature is the anti-lock-in core: deactivate a block plugin without leaving broken markup behind.