Anthropic Sdk Csharp 12.40.0

12.40.0 (2026-08-07)

Full Changelog: Anthropic-v12.39.0...Anthropic-v12.40.0

Features

• api: add mid-conversation-tool-changes-2026-07-01 beta (1fcee67)
• api: add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub (1dc6838)

Bug Fixes

• client: preserve cache token counts when message_delta omits them (#215) (75fbb01)

Chores

• api: remove retired Claude Opus 4.1 models (e4b7d85)
• docs: small updates to descriptions (0cc3614)
• docs: updates to a few documentation strings (8f34be8)