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Why single-model AI writing plateaus, and what beats it.

A clear-eyed look at why one model in one pass can't produce publishable work, what the research says about multi-agent systems, and how the pieces fit together in production. Written for people who publish for a living.

• Why single-model AI tools have a structural quality ceiling
• What the research says about multi-agent decomposition and verification
• Why chaining prompts by hand collapses in daily practice
• The anatomy of a production multi-agent writing system
• The persona system, the improvement loop, and the brief matrix