Release python-1.9.0 · microsoft/agent-framework

[1.9.0] - 2026-06-18

agent-framework-core: Add AgentLoopMiddleware for re-running agents in a loop (#6174)
agent-framework-core: Integrate tool approval into the harness agent (#6522)
agent-framework-core: Add tool approval middleware (#6414)
agent-framework-core: Integrate the shell tool into the harness agent (#6451)
agent-framework-core: Capture context provider instructions in agent telemetry (#6515)
agent-framework-core, agent-framework-ag-ui: Add opt-in AG-UI thread snapshot persistence and hydration (#6471)
agent-framework-foundry-hosting: Emit failed events for hosted agent responses (#6502)

agent-framework-core: [BREAKING] Add sampling guardrails to MCP tools — deny server-initiated sampling by default and add sampling_approval_callback, sampling_max_tokens, and sampling_max_requests parameters (#6413)
agent-framework-core: [BREAKING] Align FileAccess tools with .NET, adding directory discovery and recursive search (#6476)
agent-framework-declarative: [BREAKING] Additional fixes for declarative workflow execution (#6489)
agent-framework-azure-contentunderstanding: Adopt azure-ai-contentunderstanding to_llm_input in the CU context provider (#5796)
agent-framework-orchestrations: Promote to stable (1.0.0)

agent-framework-core: Stop forwarding the unsupported function_invocation_configuration kwarg from as_agent (#6520)
agent-framework-core: Fix MCP allowed_tools empty-list handling (#6296)
agent-framework-core: Disable harness compaction when max tokens are not provided (#6410)
agent-framework-core: Parse MCP CallToolResult.structuredContent to prevent tool results returning None (#6421)
agent-framework-core: Catch bare ImportError during hosted-environment detection so optional Foundry hosting probing cannot crash user-agent setup
agent-framework-anthropic, agent-framework-core, agent-framework-openai: Fix OTel usage detail attributes (#6493)
agent-framework-foundry, agent-framework-openai: Fix Azure AI Search citation URLs (#6453)
agent-framework-foundry: Fix aiohttp dependency specification (#6567)
agent-framework-declarative: Fix declarative workflow execution (#6468)
samples: Fix harness console rendering a single streamed tool call multiple times (#6549)
samples: Fix ollama_chat_client.py to pass tools via the options dict (#6480)

Full Changelog: python-1.8.1...python-1.9.0