Anthropic: v12.21.0

12.21.0 (2026-05-13)

Full Changelog: Anthropic-v12.20.1...Anthropic-v12.21.0

Features

• api: Add BetaManagedAgentsSearchResultBlock types (3e20ea7)
• api: Add support for cache diagnostics beta (bf1ba59)

Chores

• api: spec updates (5fd91e0)