What changed
No action needed unless you validate responses against a closed schema.
Affects GET /accounts/{account_id}/workers/observability/usage.
Who is affected
Code that reads GET /accounts/{account_id}/workers/observability/usage (result.breakdown[].eventSize).
Before and after
| Where | Before | After |
|---|---|---|
| GET /accounts/{account_id}/workers/observability/usage · result.breakdown[].eventSize | absent | present |
Based on Cloudflare’s published API specification. How severity is decided.