Anthropic's Python SDK 1.5.0 adds auto-mode tool permissions for Managed Agents and refuses group-readable credential files
GitHub·medium signal
anthropic-sdk-python v1.5.0 (2026-09-10) adds auto-mode tool permissions for Managed Agents, lets Managed Agents sessions mount public GitHub repos without an authorization_token, and adds a `content_too_large` web_fetch error code. The client now refuses credentials files that group or others can read, and it accepts tool objects directly in messages.create, parse, stream and count_tokens. A streaming fix keeps partial tool-input JSON off content blocks.