✨ Added

• OpenAI Responses API migration with multimodal content support
• xAI provider (replacing Groq)
• Gemini 3 thought signature support for multi-turn tool calling
• Tool calling support for local HuggingFace models
• Browser session persistence and tab management
• get_page_overview() and inspect_element() browser tools
• Error-category-based steering system
• Provider integration tests (OpenAI, Anthropic, Google, OpenRouter, xAI)

🔄 Changed

• Domain updated from marsys.io to marsys.ai
• Topology keys renamed from nodes/edges to agents/flows
• Default convergence policy changed to strict (1.0)
• Examples updated to use Claude Sonnet 4.5 via OpenRouter

🔧 Fixed

• Google API 429 rate limit handling
• Cross-document element handle errors in browser agent
• Parallel branch execution and continuation state management
• Vision agent initialization and screenshot handling
• aiohttp session cleanup in auto_run()