Building in Active Guardrails With GPT-5.2

This post details the integration of GPT-5.2 into Harvey's platform, highlighting its enhanced 'capability awareness' which allows it to reason about its own limitations and proactively communicate constraints to users. This moves the system from passive execution to active guardrails, reducing hallucinations and silent failures. Key improvements include better reasoning about impossible tasks, improved citation generation for transparent sourcing, and strict adherence to formatting standards for structural integrity. This enhances the AI's ability to act as a transparent partner and a more reliable coworker.