Open Source Projects Are Closing Implementation to Outsiders Because Reviewing Agent-Written Patches Costs More Than Writing Them

arXiv 2609.12236·medium signalXBlueskyLinkedInCopy link

This paper names the emerging form a stewardship community: a small core keeps implementation authority while the wider community still shapes the software without writing code, and access to coding depends on approval rather than self-initiated contribution. The driver is not that the code is AI-generated but that AI collapsed the cost of producing a patch while leaving the cost of reviewing someone else's patch untouched, so a contribution no longer justifies the review. The consequence the authors flag is renewal: if maintainers use coding agents to replace the implementation labor outside contributors used to supply, projects lose the pipeline that produced their next maintainers.