{"id":"solutions-are-self-contained-no-shared-imports","text":"Solution files define all needed data structures locally (e.g., `TreeNode`) rather than importing from a shared utility module — every problem directory is independent.","truth_value":"IN","source":"entries/2026/06/06/root-equals-sum-of-children-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"solutions-are-self-contained-no-shared-imports","truth_value":"IN","reason":"premise"}]}}