# clm_2D170B423264

subject: Claude (/record/claude.md)  
predicate: policy_changed  
value: diagnostics field  
valid_from: 2026-09-18  
valid_to: null  
published: 2026-09-18  
recorded: 2026-11-07  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-07  
cite: AsOf. "Claude policy changed: diagnostics field", as of 2026-09-18. Claim clm_2D170B423264, https://asof.is/claim/clm_2D170B423264, accessed 2026-11-09. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-09-18.  
checked: 2026-11-07 · its source page states the value and the date  

> September 18, 2026  For cache diagnostics , a response to a request that sends the cache-diagnosis-2026-04-07 beta header now always includes the diagnostics field. The field is null when the request did not include the diagnostics object. Previously the field was omitted in that case.

What https://platform.claude.com/docs/en/release-notes/overview#2026-09-18 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-09-18 (primary, Anthropic, published 2026-09-18)

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.