* fix: strip function_call and text_reasoning from cross-agent workflow handoff When a reasoning model (e.g. gpt-5-mini) runs as Agent 1 in a workflow, its response includes text_reasoning items (with server-scoped IDs like rs_XXXX) and function_call items. Forwarding these to Agent 2 in a fresh conversation caused API errors because the reasoning/call IDs are scoped to the original stored response context. Changes: - Strip 'function_call', 'text_reasoning', 'function_approval_request', and 'function_approval_response' from handoff messages in _agent_executor.py - Keep 'function_result' so the actual tool output content is preserved for the next agent's context - Update unit tests to reflect that function_result messages survive handoff (messages grow from 2→3: user, tool(result), assistant(summary)) - Fix incorrect test assertions in test_function_invocation_stop_clears_* that assumed the client layer updates session.service_session_id - Also fixed _extract_function_calls to search all messages with call_id deduplication, and the error-limit stop path to submit function_call_output items before halting (via tool_choice=none cleanup call) Relates to: https://github.com/microsoft/agent-framework/issues/4047 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * fix: reasoning model workflow handoff and history serialization Fixes multiple related issues when using reasoning models (gpt-5-mini, gpt-5.2) in multi-agent workflows that chain agents via from_response or replay full conversation history via AgentExecutorRequest. ## Reasoning items always emitted on output_item.added When a reasoning model produces encrypted or hidden reasoning (no visible text), the Responses API still fires a reasoning output item without any reasoning_text.delta events. Previously no text_reasoning Content was emitted in that case, making it invisible to downstream logic. Both the non-streaming (_parse_response_from_openai) and streaming (output_item.added) paths now always emit at least one text_reasoning Content — with empty text if no content is available — so co-occurrence detection and serialization guards work reliably. ## Reasoning items only serialized when paired with a function_call The Responses API only accepts reasoning items in input when they directly preceded a function_call in the original response. Sending a reasoning item that preceded a text response (no tool call) causes: "reasoning was provided without its required following item" _prepare_message_for_openai now checks has_function_call per message and skips text_reasoning serialization when there is no accompanying function_call. ## summary field is an array, not an object The reasoning item summary field sent to the Responses API must be an array of objects ([{"type": "summary_text", "text": ...}]), not a single object. Fixed _prepare_content_for_openai accordingly. ## service_session_id cleared when explicit history is provided When a workflow coordinator replays a full conversation (including function calls from a previous agent run) back to an executor via AgentExecutorRequest or from_response, the executor's session still held a service_session_id (previous_response_id) from the prior run. The API then received the same function-call items twice — once from previous_response_id (server-stored) and once from the explicit input — causing: "Duplicate item found with id fc_...". AgentExecutor.run (when should_respond=True) and from_response now reset self._session.service_session_id = None before running so that explicit input is the sole source of conversation context. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * small improvements in text reasoning * refactor: add reset_service_session to AgentExecutorRequest for explicit history replay Replace the implicit 'always clear service_session_id when should_respond=True' with an explicit opt-in field on AgentExecutorRequest. The old approach used should_respond=True as a proxy for 'full history replay', but that conflates two distinct intents: - Orchestrations group chat sends should_respond=True with an empty/single-message list (not a full replay) — unnecessarily clearing service_session_id. - HITL / feedback coordinators send the full prior conversation and truly need a fresh service session ID to avoid duplicate-item API errors. Changes: - Add AgentExecutorRequest.reset_service_session: bool = False - AgentExecutor.run only clears service_session_id when this flag is True - AgentExecutor.from_response unchanged (always clears; always full conversation) - Set reset_service_session=True in all full-history-replay call sites: agents_with_HITL.py, azure_chat_agents_tool_calls_with_feedback.py, autogen-migration round-robin coordinator, tau2 runner - Update _FullHistoryReplayCoordinator test helper to pass the flag Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * comment update * fixes from feedback * fix test * reverted changes to agent executor * fix: remove reset_service_session from tau2 runner Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * two other reverts * fix sample --------- Co-authored-by: Giles Odigwe <79032838+giles17@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Welcome to Microsoft Agent Framework!
Welcome to Microsoft's comprehensive multi-language framework for building, orchestrating, and deploying AI agents with support for both .NET and Python implementations. This framework provides everything from simple chat agents to complex multi-agent workflows with graph-based orchestration.
Watch the full Agent Framework introduction (30 min)
📋 Getting Started
📦 Installation
Python
pip install agent-framework --pre
# This will install all sub-packages, see `python/packages` for individual packages.
# It may take a minute on first install on Windows.
.NET
dotnet add package Microsoft.Agents.AI
📚 Documentation
- Overview - High level overview of the framework
- Quick Start - Get started with a simple agent
- Tutorials - Step by step tutorials
- User Guide - In-depth user guide for building agents and workflows
- Migration from Semantic Kernel - Guide to migrate from Semantic Kernel
- Migration from AutoGen - Guide to migrate from AutoGen
Still have questions? Join our weekly office hours or ask questions in our Discord channel to get help from the team and other users.
✨ Highlights
- Graph-based Workflows: Connect agents and deterministic functions using data flows with streaming, checkpointing, human-in-the-loop, and time-travel capabilities
- AF Labs: Experimental packages for cutting-edge features including benchmarking, reinforcement learning, and research initiatives
- DevUI: Interactive developer UI for agent development, testing, and debugging workflows
See the DevUI in action (1 min)
- Python and C#/.NET Support: Full framework support for both Python and C#/.NET implementations with consistent APIs
- Observability: Built-in OpenTelemetry integration for distributed tracing, monitoring, and debugging
- Multiple Agent Provider Support: Support for various LLM providers with more being added continuously
- Middleware: Flexible middleware system for request/response processing, exception handling, and custom pipelines
💬 We want your feedback!
- For bugs, please file a GitHub issue.
Quickstart
Basic Agent - Python
Create a simple Azure Responses Agent that writes a haiku about the Microsoft Agent Framework
# pip install agent-framework --pre
# Use `az login` to authenticate with Azure CLI
import os
import asyncio
from agent_framework.azure import AzureOpenAIResponsesClient
from azure.identity import AzureCliCredential
async def main():
# Initialize a chat agent with Azure OpenAI Responses
# the endpoint, deployment name, and api version can be set via environment variables
# or they can be passed in directly to the AzureOpenAIResponsesClient constructor
agent = AzureOpenAIResponsesClient(
# endpoint=os.environ["AZURE_OPENAI_ENDPOINT"],
# deployment_name=os.environ["AZURE_OPENAI_RESPONSES_DEPLOYMENT_NAME"],
# api_version=os.environ["AZURE_OPENAI_API_VERSION"],
# api_key=os.environ["AZURE_OPENAI_API_KEY"], # Optional if using AzureCliCredential
credential=AzureCliCredential(), # Optional, if using api_key
).as_agent(
name="HaikuBot",
instructions="You are an upbeat assistant that writes beautifully.",
)
print(await agent.run("Write a haiku about Microsoft Agent Framework."))
if __name__ == "__main__":
asyncio.run(main())
Basic Agent - .NET
Create a simple Agent, using OpenAI Responses, that writes a haiku about the Microsoft Agent Framework
// dotnet add package Microsoft.Agents.AI.OpenAI --prerelease
using System;
using OpenAI;
// Replace the <apikey> with your OpenAI API key.
var agent = new OpenAIClient("<apikey>")
.GetOpenAIResponseClient("gpt-4o-mini")
.AsAIAgent(name: "HaikuBot", instructions: "You are an upbeat assistant that writes beautifully.");
Console.WriteLine(await agent.RunAsync("Write a haiku about Microsoft Agent Framework."));
Create a simple Agent, using Azure OpenAI Responses with token based auth, that writes a haiku about the Microsoft Agent Framework
// dotnet add package Microsoft.Agents.AI.OpenAI --prerelease
// dotnet add package Azure.Identity
// Use `az login` to authenticate with Azure CLI
using System;
using OpenAI;
// Replace <resource> and gpt-4o-mini with your Azure OpenAI resource name and deployment name.
var agent = new OpenAIClient(
new BearerTokenPolicy(new AzureCliCredential(), "https://ai.azure.com/.default"),
new OpenAIClientOptions() { Endpoint = new Uri("https://<resource>.openai.azure.com/openai/v1") })
.GetOpenAIResponseClient("gpt-4o-mini")
.AsAIAgent(name: "HaikuBot", instructions: "You are an upbeat assistant that writes beautifully.");
Console.WriteLine(await agent.RunAsync("Write a haiku about Microsoft Agent Framework."));
More Examples & Samples
Python
- Getting Started with Agents: progressive tutorial from hello-world to hosting
- Agent Concepts: deep-dive samples by topic (tools, middleware, providers, etc.)
- Getting Started with Workflows: workflow creation and integration with agents
.NET
- Getting Started with Agents: basic agent creation and tool usage
- Agent Provider Samples: samples showing different agent providers
- Workflow Samples: advanced multi-agent patterns and workflow orchestration
Contributor Resources
Important Notes
If you use the Microsoft Agent Framework to build applications that operate with third-party servers or agents, you do so at your own risk. We recommend reviewing all data being shared with third-party servers or agents and being cognizant of third-party practices for retention and location of data. It is your responsibility to manage whether your data will flow outside of your organization's Azure compliance and geographic boundaries and any related implications.
