Observability and evidence in AI coding workflows: two log streams, two masters

A few months back I watched an external reviewer ask one question I could not answer. For the AI session that touched this medical device firmware on Tuesday, can you show me the inputs, the policy decisions, the outputs, and a signature that says nobody changed the record? We had beautiful dashboards. Token usage, latency, top tools, error rates. We did not have what she was asking for. That conversation forced a vocabulary change. We started saying observability and evidence as two separa...