{"id":"repo-modules-self-contained","text":"Each problem directory is a self-contained module — types like `TreeNode` are defined locally rather than imported from a shared location, and there are no cross-problem runtime imports.","truth_value":"IN","source":"entries/2026/06/06/find-all-the-lonely-nodes-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"repo-modules-self-contained","truth_value":"IN","reason":"premise"}]}}