The Agent Role Boundary Problem: Why Your AI Agents Keep Stepping on Each Other

Every multi-agent system eventually hits the same wall: agents start doing each other's jobs. One agent rewrites a file another agent owns. Two agents make conflicting decisions about the same resource. A "helper" agent silently overrides the primary agent's output. This isn't a model problem. It's a role boundary problem — and it's 100% fixable in config. Why It Happens Most multi-agent setups define what each agent does but not what each agent owns . There's a difference. Does: "Suki handles marketing content" Owns: "Suki is the only agent that writes to /content/drafts/ and /content/daily/" When you only define "does," agents use judgment to decide when to cross into another agent's lane. They're usually wrong. The Ownership Zone Pattern Give every agent an explicit ownership declaration in their SOUL.md: ## Ownership Zones I own these paths and resources: - /content/drafts/ — all files - /content/daily/ — all files - twitter-queue.json — full control I never write to: - /state/fina