{"id":"meta-page-is-page-zero","text":"The B-tree metadata (root, height, total_keys, next_free, free_head) is always stored at file offset 0 in page 0, which is reserved as the superblock and occupies exactly `page_size` bytes.","truth_value":"IN","source":"entries/2026/05/29/b-tree-storage-engine-btree-_write_meta.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"meta-page-is-page-zero","truth_value":"IN","reason":"premise"}]}}