{"id":"btree-sibling-chain-fixed-offset","text":"The `next_sibling` field sits at a fixed byte offset (bytes 3–6) in every serialized leaf page, making the sibling chain walkable without fully deserializing page contents","truth_value":"IN","source":"entries/2026/05/29/topic-split-during-insert.md","source_url":"","source_hash":"","justifications":[],"dependents":["btree-sibling-chain-maintained-across-mutations"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"btree-sibling-chain-fixed-offset","truth_value":"IN","reason":"premise"}]}}