Agents
Microsoft Agent Framework 1.19.0 hardens MCP: per-invocation session scoping, ZIP-only skill archives, digest verification
The Python 1.19.0 release shipped 2026-09-18 with breaking changes that authenticate and scope MCP requests and sessions to the correct invocation identity, origin and ownership, restrict MCP skill archives to ZIP files, deprecate the MCP sampling callback, and verify skill archive digests. It also adds generic vector-store provider protocols with new MongoDB, Azure DocumentDB and Azure Cosmos DB NoSQL connectors, per-tool AgentModeProvider exposure controls, and an option to run function calls sequentially. Several fixes target compaction summaries and checkpoint round-trips, which is where long-running workflow state tends to get silently lost.
↳ Follow the thread