What changed
No action needed unless you validate responses against a closed schema.
Affects GET /ai-gateway/byok-credentials/list.
Who is affected
Code that reads GET /ai-gateway/byok-credentials/list (credentials[].rotatedAt).
Before and after
| Where | Before | After |
|---|---|---|
| GET /ai-gateway/byok-credentials/list · credentials[].rotatedAt | absent | present |
Based on Vercel’s published API specification. How severity is decided.