The last piece ended by naming something I could not answer. A reader had asked what happens when a credential is rotated in the middle of a long-running session, and I said that question landed in the part my control plane explicitly excludes, so I had nothing to report. A second reader replied that I had already answered it. They were right. The rule held up; the boundary I drew was too wide, and it pulled this question into the excluded part. The answer was the second rule, one layer down...