agent-framework

vpython-1.9.0 scope: python Breaking

This release includes 3 breaking changes for platform teams planning a safe upgrade.

Published 1mo AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework agentic-ai agents ai .net multi-agent

+4 more

orchestration python sdk workflows

Affected surfaces

auth breaking_upgrade

Summary

AI summary

[BREAKING] Add sampling guardrails to MCP tools, deny server‑initiated sampling by default and introduce new sampling parameters.

Full changelog

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: https://github.com/microsoft/agent-framework/compare/python-1.8.1...python-1.9.0

[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
[BREAKING] Align FileAccess tools with .NET, adding directory discovery and recursive search
[BREAKING] Additional fixes for declarative workflow execution

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About agent-framework

A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET.

vpython-1.8.0 [BREAKING — experimental] Refactor Skill API to async resource and script lookup
vpython-1.8.0 [BREAKING] Upgrade github-copilot-sdk to v1.0.0 (stable)
vdotnet-1.9.0 Removes [Experimental] tag from .NET Orchestrations, marking them stable.
vpython-1.7.0 Remove Python-only declarative actions and rename alias kinds to C# canonical names in agent-framework-declarative.
vpython-1.6.0 Enable instrumentation by default in agent-framework-core and agent-framework-foundry.