Coding agents raised OSS throughput 39% and collapsed human-to-human interaction from 32.4% to 11.6%.

An LLM-based multi-agent simulation seeded with real GitHub data from 1,084 active developers branched the same community state into no-agent and agent conditions for 4-week runs (arXiv 2608.03585). Planned tasks up 34%, completed up 39%, median completion time from 45 to 20 minutes. But adoption reached only 26% and gains concentrated among already-active, well-connected developers, agent-mediated modes rose to 57.3% (40.3% of it agent-assisted self-loops), and the resulting public corpus scored 22.3% knowledge coverage on a retrieval benchmark versus 81.1% for the real-human corpus. It's a simulation, so hold it loosely. But that last number is the argument for Rust's policy, expressed quantitatively.