v3.15.2

Features

• Added Claude 4.5 Opus model support by @suzuki-safie (#984)
• Added Mermaid diagram rendering support by @Yukinobu-Mine (#981)

Bug Fixes

• Fixed Claude 4.1 Opus "temperature and top_p cannot both be specified" error by @suzuki-safie (#979)

Enhancements

• Updated MCP (Model Context Protocol) from 1.12.2 to 1.23.0, bringing compliance with latest MCP spec 2025-11-25 including sampling with tools, task support, enhanced authentication, and improved security features by @app/dependabot (#985)
• Updated js-yaml to 3.14.2 in CDK dependencies to address prototype pollution security vulnerability by @app/dependabot (#977)
• Updated PrismJS and react-syntax-highlighter dependencies to latest versions for improved syntax highlighting security and functionality by @app/dependabot (#976)
• Updated js-yaml to 4.1.1 in frontend dependencies to fix prototype pollution security issue by @app/dependabot (#975)