# clm_8A3D07D2DCB7

subject: Anthropic (/record/anthropic.md)  
predicate: policy_changed  
value: parent content block  
valid_from: 2025-05-01  
valid_to: null  
published: 2025-05-01  
recorded: 2026-11-14  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-14  
cite: AsOf. "Anthropic policy changed: parent content block", as of 2025-05-01. Claim clm_8A3D07D2DCB7, https://asof.is/claim/clm_8A3D07D2DCB7, accessed 2026-11-14. Source: https://platform.claude.com/docs/en/release-notes/overview#2025-05-01.  
checked: 2026-11-14 · its source page states the value and the date, as read by an AI model  

> May 1, 2025 Cache control must now be specified directly in the parent content block of tool_result and document.source .

What https://platform.claude.com/docs/en/release-notes/overview#2025-05-01 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2025-05-01 (primary, Anthropic, published 2025-05-01)

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