{"id":"duplication-over-shared-infrastructure","text":"Data structures and helpers are systematically duplicated per problem directory rather than factored into shared modules, trading DRY for zero coupling across 400+ solutions.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["treenode-is-de-facto-shared-via-inline-copies","tree-serialization-helpers-duplicated","per-problem-data-structure-isolation","repo-no-cross-problem-imports"],"outlist":[],"label":"Architecture deliberately prioritizes isolation over deduplication"}],"dependents":["duplication-cost-free-when-implementations-correct","leetcode-judge-optimized-not-reusable","no-consistency-enforcement-at-any-level"],"metadata":{"last_reviewed":"2026-06-07T22:02:22","review_result":"unnecessary"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"duplication-over-shared-infrastructure","truth_value":"IN","reason":"SL justification valid","antecedents":["treenode-is-de-facto-shared-via-inline-copies","tree-serialization-helpers-duplicated","per-problem-data-structure-isolation","repo-no-cross-problem-imports"],"label":"Architecture deliberately prioritizes isolation over deduplication"},{"node":"treenode-is-de-facto-shared-via-inline-copies","truth_value":"IN","reason":"premise"},{"node":"tree-serialization-helpers-duplicated","truth_value":"IN","reason":"premise"},{"node":"per-problem-data-structure-isolation","truth_value":"IN","reason":"premise"},{"node":"repo-no-cross-problem-imports","truth_value":"IN","reason":"premise"}]}}