Anthropic: v12.31.0

12.31.0 (2026-06-24)

Full Changelog: Anthropic-v12.30.0...Anthropic-v12.31.0

Features

• client: add support for system.message streaming events (9bfe2fc)

Chores

• api: add support for new refusal category (052f687)
• api: add support for sending User Profile ID in request headers (02d6377)
• internal: add lock file (#63) (6a75efb)