Story · arXiv
Passes Alone, Fails Together: Benchmarking Semantic Coordination in Parallel LLM-Agent Development (arXiv)
paper · Story page
Two agents each write a patch that passes alone, then the pair breaks when combined. Interference hit 97% of runs on constructed tasks using 12 real Django helpers, and one of 834 runs on mined pull-request pairs; the authors say the constructed rate estimates nothing about practice.
In plain words
- Researchers found that changes written by separate artificial intelligence coding assistants can work individually but break when put together.
- One assistant can change a rule that the other assistant's work still depends on.
- These conflicts were common in specially constructed tests but appeared only once in 834 runs using previously accepted changes.
- Teams using coding assistants still need to check combined work, though these artificial tests do not reveal how common conflicts are.
Appeared in
- Two MemOS packages shipped credential stealers into the agent memory layer
Sep 24, 2026 · in the sections
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