# clm_98F9687CBDD9

subject: Claude (/record/claude.md)  
predicate: feature_added  
value: browser_toolset_20260801  
valid_from: 2026-08-19  
valid_to: null  
published: 2026-08-19  
recorded: 2026-11-08  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-09  
cite: AsOf. "Claude feature added: browser_toolset_20260801", as of 2026-08-19. Claim clm_98F9687CBDD9, https://asof.is/claim/clm_98F9687CBDD9, accessed 2026-11-10. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-08-20.  
checked: 2026-11-09 · its source page states the value and the date  

> We’ve launched the browser use tool ( browser_toolset_20260801 ), a client toolset for driving a browser that your application hosts.

What https://platform.claude.com/docs/en/release-notes/overview#2026-08-20 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-08-20 (primary, Anthropic, published 2026-08-20)
- https://platform.claude.com/docs/en/release-notes/overview#2026-08-19 (primary, Anthropic, published 2026-08-19)

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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.