Every business deploying Claude Cowork needs to understand a fundamental distinction: some rules are sharp and some are fuzzy. Sharp rules are deterministic — when a deal is marked as won in your CRM, a notification fires to the manager. That's not a judgment call. It's a trigger. Fuzzy rules are contextual — should Claude flag this email as urgent? That depends on content, sender, timing, and a dozen other signals that don't reduce to a boolean.
Where the boundaries belong
Hard boundaries belong in the system layer — connectors, APIs, and automation pipelines. If your sales team shouldn't be able to delete orders, that's an API permission, not something you ask an LLM to enforce. The LLM operates within those boundaries, bringing context and judgment to the spaces where rigid rules can't cover every scenario. You're not trying to make Claude bulletproof on everything. You design the workflow so the sharp stuff is already handled before Claude even enters the picture.
This separation is what makes governed deployments reliable. The system handles what must be deterministic. Claude handles what benefits from intelligence. When businesses blur this line — asking the LLM to enforce hard rules or expecting the system to make judgment calls — that's when deployments go sideways.