{"id":"btree-leaf-split-copies-key","text":"Leaf splits copy the midpoint key into both the parent and the right leaf (key remains searchable in the leaf), while internal splits promote the midpoint key out of both children into the parent only","truth_value":"IN","source":"entries/2026/05/28/b-tree-storage-engine-btree-_insert.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"btree-leaf-split-copies-key","truth_value":"IN","reason":"premise"}]}}