Why Multi-Agent Coding Systems Fail in Production and a Proposed Isolation Fix

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A technical report argues that many enterprise multi-agent coding projects stall because the same model both writes and judges its own code, letting blind spots compound. The author describes a containment design that partitions state by role, so an orchestrator, a contracts owner, and separate backend and frontend workers each control only their own files. Each phase must pass two independent checks: a clean-room tester that runs real builds and audits, and a read-only auditor that cannot edit what it reviews. After three failed reviews, automated retries stop and the issue is escalated with evidence. The report frames reliability as a state-isolation and control problem rather than a prompting one.

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