Fourteen days. September 15 to September 29. TypeSafe AI launched Jev on September 15, 2026, after two years in stealth. On September 29, 2026 — fourteen days later — OpenAI announced the Decisions API at Dev Day. Same job. Same design intent. Faster incumbent. That timeline is not incidental. It reflects how quickly a platform company can move once a specialist has demonstrated that a market exists. And it raises a specific question for any team now choosing between the two: is speed the right variable to optimise for, or is calibration? The origin story matters here. TypeSafe AI’s founder, Diogo Almeida, is a former OpenAI researcher. Sam Altman publicly… 

AI agent guardrails are a necessary starting point for enterprise AI safety — but they have known bypass paths, including prompt injection, multi-agent permission creep, and silent drift after model updates. This post maps the failure modes and explains why runtime governance is the layer most enterprise teams are missing.