Microsoft Agent Framework Hits RC2: Unified Successor to Semantic Kernel and AutoGen Ships Stable API Surface

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Microsoft's Agent Framework — the consolidation of Semantic Kernel and AutoGen into a single framework — reached Release Candidate 2 for Python (rc1 shipped Feb 19), with GA targeted in coming weeks. The RC brings stable API surface with renamed core types (ChatAgent→Agent, ChatMessage→Message), long-running agent support, background responses, and streaming code interpreter deltas. Migration guides from both Semantic Kernel and AutoGen are now published with .NET and Python parity.