Agent Framework Updates & Release Notes

Changes:

• 245d4284a5018b7f446b5eac4d3add1fa5547229 .NET: Restore source-only release solution filter (#9140) [ #8537 ]
• d0ccaa62761ec36c59c139940797978623fb630a .NET: Preserve explicit null session state across roundtrips (#9012)
• 279d97f75cb2e7eee885dcdc2c741ef7361ee903 .NET: Honor disabled recent search memory (#9013)
• 41e785fb9a3c853272ce0fbd2eb93364e9d1de13 .NET: Preserve lazy request messages through agent invocation (#9017)
• 9251bc9911d30f5035b4a75cd1c61f96c90f38a6 .NET: Update version for 1.24.0 release (#9120)
• 73a96cb1a90213dfc2b1d36e7c7250559fb28d5d .NET: Stabilize Anthropic agent package (#9111) [ #9110 ]
• 0774607d8d3fa8a3f50cd5bda7b4c7ad400403f3 .NET: Reject sensitive declarative identifiers (#9071)
• 41c4f1c9b0242cfc3f2567db9f9c9a462982a4e7 .NET: Harden LocalCodeAct capability validation (#9057)

<details><summary><b>See More</b></summary>

• b9d24c8fb484c8330abe8bb9e7500ca3c3bbf46c .NET: test: add loopback destination regression coverage (#9064)
• bd5ab48cfdebb49b9223de0fc75c7141641927f3 .NET: Validate handoff request lifecycle before routing (#8855)
• 636e8562d1db4e678e0bb88f602e0bbc7318f6a4 .NET: Synchronize background task metadata and defer publication until session creation (#8933)
• 6ef0b73ed8ee5ae9a5cdc709edc5bfc9443d91cb .NET: Isolate GitHub Copilot attachment staging (#8846)
• 52fed574f05aa4c22ae4cc024679d501ec5f327a .NET: Preserve atomic cache creation across factory failures (#8931) …

[1.20.0] - 2026-10-02

Added

• agent-framework-foundry-hosting: Host native workflows over Foundry Responses and Foundry Invocations (#8947, #8966)
• agent-framework-duckdb, agent-framework-sql-server, agent-framework-typesafe: Add DuckDB and SQL Server native vector-store connectors and the TypeSafe AI connector (#8675, #8686, #8592)
• agent-framework, agent-framework-core: Add response-stream gates and buffering, session-scoped file-access isolation, an AgentExecutor checkpoint-state TypedDict, and opt-in FunctionInvocationContext injection for skill scripts (#8829, #8542, #8284, #8749)
• agent-framework-foundry, agent-framework-foundry-hosting, agent-framework-openai: Add native computer-use support to Responses clients and Foundry project embeddings (#8751, #8454) …

Changes:

• be01deccaf3dd7b85e03620145bc1a757c857827 .NET: Add origin pinning to Foundry toolbox MCP client (#8721)
• 0d6d2bb6b0b58f3aabdf170320ab90fc300d4c99 .NET: fix: declarative workflow http variables (#8797)
• 2024d4df4c4dd01b904fb9daaf56f5759801654a .NET: Fix workflow topology edge multiplicity comparison (#8656)
• 37ce872a85fed62cedfd7fffa2e0bd43f7d32b92 .NET: Store created external input messages (#8606)
• 1370903bd8e6eb8871781cd1fcc74f674c022e0b .NET: [BREAKING] Better support tool changes between runs (#8754)

<details><summary><b>See More</b></summary>

• 3f1f3b50b57ccabe7725f8a60539622d5f1ca7b4 .NET: Propagate TextSearchProvider caller cancellation (#8796)
• 238d7e2e9bb9b469be172460e612c89840aad1cc .NET: Validate Foundry client headers before transport (#8715)
• c804f32c983df56bacc9a8698fde9d50edc2df3e .NET: [BREAKING] Bump Azure.AI.Projects to 3.0.0-beta.3, OpenAI to 2.14.0, and MEAI to 10.10.1 (#8730) [ dotnet/extensions#7760, dotnet/extensions#7761 ]
• 93cf98a042c0f4eb8e1e180beeab9474bcd96811 .NET: Update AGUI SDK packages to 1.0.0 (#8769)
• 109234952ad417b0e9368beed633e438eb2e389d Clarify CodeAct guest packages and host network access (#8781)
• 6f1522a50b66f117da34cc25ea299ba24a528b15 Temporarily skip OpenAI integration tests while the CI API key is invalid (#8767)
• 2c46deb91e70ea6d7bbc99263147e0f470d52546 .NET: Clarify hosting authentication, authorization, and isolation guidance (#8677) …

[1.19.0] - 2026-09-18

Added

• agent-framework, agent-framework-core: Add generic vector-store provider protocols, instrumentation message-event controls, and per-tool AgentModeProvider exposure controls (#8421, #8451, #8450)
• agent-framework-mongodb: Add the alpha MongoDB vector-store connector (#8184)
• agent-framework-azure-documentdb: Add the alpha Azure DocumentDB vector-store connector (#8185)
• agent-framework-azure-cosmos, agent-framework-core: Add an Azure Cosmos DB NoSQL implementation of the shared vector-store APIs (#8186)
• agent-framework-orchestrations: Add stable names for built-in orchestration workflows and register their checkpoint types for restoration (#8384, #8258)
• agent-framework-devui: Display Aspire traces in the developer UI (#7874)
• agent-framework-core: Add an option to invoke function calls sequentially (#8453) …

What's Changed

• .NET: fix: race concdition in workflow formula state by @baywet in https://github.com/microsoft/agent-framework/pull/8252
• .NET: update remaining dependencies by @baywet in https://github.com/microsoft/agent-framework/pull/8307
• .NET: fix: inspect for delemiter value before adding headers by @baywet in https://github.com/microsoft/agent-framework/pull/8301
• docs: fix 'availble' typo in ADR 0001 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8325
• .NET: docs: use 'a FunctionApprovalRequestContent' in ADR 0006 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8322
• .NET: docs: fix 'valueable' typo in ADR 0001 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8318
• .NET: docs: remove duplicate 'turns' in ADR 0006 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8317
• .NET: docs: fix 'extention' typo in ADR 0001 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8316
• docs: fix 'allow to' grammar in ADR 0011 by @mrchatam in https://github.com/microsoft/agent-framework/pull/8335
• Improve issue triage by @moonbox3 in https://github.com/microsoft/agent-framework/pull/8362
• .NET: expose OpenTelemetryAgent.DefaultSourceName by @YashvantHange in https://github.com/microsoft/agent-framework/pull/7815
• .NET: Temporarily skip flaky steering harness session reuse test by @rogerbarreto with @Copilot in https://github.com/microsoft/agent-framework/pull/8377 …

What's Changed

• .NET: Replace deprecated AWSSDK.Extensions.Bedrock.MEAI with AWS.Bedrock.MEAI by @BenGearset in https://github.com/microsoft/agent-framework/pull/7983
• .NET: Remove Azure.AI.OpenAI dependency by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7986
• .NET: Track and update A2A task state by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7998
• .NET: Update Azure AI Projects to 3.0.0 beta 1 by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7995
• .NET: Bump Aspire.Hosting from 13.5.2 to 13.5.3 by @dependabot[bot] in https://github.com/microsoft/agent-framework/pull/8029
• .NET: [BREAKING] Add file_access_read_lines and move the line-numbering contract onto AgentFileStore by @antsok in https://github.com/microsoft/agent-framework/pull/7671
• Bump Anthropic from 12.42.0 to 12.43.0 by @dependabot[bot] in https://github.com/microsoft/agent-framework/pull/8028
• .NET: Bump AgentMemory.AgentFramework from 1.4.1 to 1.5.0 by @dependabot[bot] in https://github.com/microsoft/agent-framework/pull/8027
• .NET: [BREAKING] Clarify A2A agent run modes by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/8032
• .NET: Clarify declarative workflow input serialization by @UniversePeak in https://github.com/microsoft/agent-framework/pull/8046
• .NET: Preserve streamed annotations in Foundry hosted responses by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7984 …

[1.18.0] - 2026-09-10

Added

• samples: Add Magentic custom-manager prompts and MLflow observability examples (#7876, #8085)
• agent-framework-core: Add shared vector-store abstractions, portable filters, and an in-memory vector store (#8014, #8115)
• agent-framework-core: Add a maximum-duration bound and stop-reason signal to the tool invocation loop (#7772)
• agent-framework-core: Support mixed workflow invocation keyword arguments (#7963)
• agent-framework-ag-ui: Add emit_messages_snapshot configuration for suppressing the terminal message snapshot (#7808)
• agent-framework-ag-ui, agent-framework-core: Add supported MCP Host-history conversion for persisted AG-UI conversations (#8130)
• agent-framework-azure-ai-search, agent-framework-core: Add an Azure AI Search implementation of the shared vector-store APIs (#8153) …

[1.17.0] - 2026-09-03

Added

• samples: Add an end-to-end Foundry-hosted Telegram agent sample (#7883)
• agent-framework-foundry-hosting: Add explicit Agent Server or agent-owned model history selection while preventing duplicated conversation replay (#7997)

Changed

• agent-framework-core, agent-framework-foundry: [BREAKING] Restore sequence-only agent middleware inputs and remove the experimental agent-hooks core extra (#7918)
• agent-framework-core, agent-framework-foundry, agent-framework-openai: Document the same-event-loop concurrency contract for shared chat clients (#7680)
• agent-framework-devui, agent-framework-hosting-responses, agent-framework-openai: Support OpenAI SDK 3.x while retaining the existing supported floors (#7967)
• agent-framework-mistral: Migrate chat and embedding clients to the official Mistral SDK (#7960)

Fixed …

What's Changed

• .NET: Bump AWSSDK.Extensions.Bedrock.MEAI from 4.0.6.10 to 4.0.101.8 by @dependabot[bot] in https://github.com/microsoft/agent-framework/pull/7829
• .NET: Stabilize Foundry recovery tests by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7817
• .NET: fix: preserve Responses logprobs field by @he-yufeng in https://github.com/microsoft/agent-framework/pull/5860
• .NET: Honor cancellation for Foundry-hosted workflow responses by @rogerbarreto with @Copilot in https://github.com/microsoft/agent-framework/pull/7842
• .NET: Use Responses API for hosted web search in AG-UI by @rogerbarreto with @Copilot in https://github.com/microsoft/agent-framework/pull/7843
• .NET: Bump Aspire.Hosting from 13.1.0 to 13.5.2 by @dependabot[bot] in https://github.com/microsoft/agent-framework/pull/7826
• .NET: Suppress false positive Zip Slip alert by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7858
• .NET: added Mem0Sharp integration for in-memory storage in agent samples. by @jihadkhawaja in https://github.com/microsoft/agent-framework/pull/7792
• .NET: Annotate DevUI aggregator static-analysis false positives by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7864
• .NET: Rename CommunityToolkit.VectorData.CosmosNoSql to AzureCosmosDB by @adamsitnik in https://github.com/microsoft/agent-framework/pull/7878 …

[1.16.0] - 2026-08-27

Added

• agent-framework-core: Add configurable timeouts for waiting on the first background-agent task completion (#7908)
• agent-framework-core: Allow programmatic OpenTelemetry service metadata, resource attributes, and OTLP exporter configuration (#7703)

Changed

• agent-framework-foundry-hosting: Update Agent Server dependencies and expose parent FoundryToolbox constructor options (#7921)
• samples: Apply ChatKit attachment lifecycle checks consistently in the end-to-end sample (#7846)

Fixed

• agent-framework-ag-ui, agent-framework-foundry-hosting: Preserve backend-owned service-session snapshots and validate incremental provider continuation input (#7770)
• agent-framework-anthropic, agent-framework-mistral: Preserve unmapped provider finish reasons (#7850)
• agent-framework-azure-ai-search: Preserve the kinds of heterogeneous knowledge sources (#7875) …

What's Changed

• .NET: Add session-persisted chat client routing by @westey-m in https://github.com/microsoft/agent-framework/pull/7641
• .NET: Fix snake_case argument names in Harness file tool descriptions by @westey-m with @Copilot in https://github.com/microsoft/agent-framework/pull/7731
• .NET: Pass IServiceProvider to ChatClientAgent in AddAIAgent overloads by @westey-m in https://github.com/microsoft/agent-framework/pull/7737
• .NET: Python: Clarify PR review comment resolution by @moonbox3 in https://github.com/microsoft/agent-framework/pull/7746
• .NET: Update AG-UI samples for latest MAF + AG-UI SDK and align with docs by @danroth27 in https://github.com/microsoft/agent-framework/pull/7295
• .NET: Migrate remaining Foundry hosted samples to source deployment by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7668
• .NET: agent-hooks interception contract as a first-class experimental feature by @MohammadHaroonAbuomar in https://github.com/microsoft/agent-framework/pull/7564
• .NET: Forward AG-UI context and additional properties by @javiercn in https://github.com/microsoft/agent-framework/pull/7742
• .NET: Suppress Swagger UI CodeQL alert in AgentWebChat sample by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7764
• .NET: Remove AGUI history special cases from ChatClientAgent by @javiercn in https://github.com/microsoft/agent-framework/pull/7741 …

[1.15.0] - 2026-08-21

Added

• agent-framework-ag-ui, agent-framework-openai: Add optional A2UI support for agent-generated interfaces and preserve streaming tool-call indices for A2UI consumers (#7423)
• agent-framework-core: Add MiddlewareFailure as a first-class fatal signal for function middleware (#7562)
• agent-framework-core, agent-framework-azure-cosmos: Add a process-wide workflow checkpoint type registry, register Cosmos checkpoint state types, and declare the compatibility dependency required by the supported Cosmos SDK floor (#7636)
• agent-framework-core, agent-framework-foundry-hosting: Add steering, retry, and recovery support for resilient Foundry Hosted Agents, with long-running workflow samples (#7670)
• samples: Add the production-ready installment of the build-your-own-claw harness sample (#7698)

Changed

• agent-framework-ag-ui, agent-framework-core: [BREAKING] Consolidate OpenTelemetry GenAI semantic-convention support around stable and experimental modes with explicit message-event controls (#7673) …

What's Changed

• .NET: [Experimental] Extend A2A task store with isolation key scoping by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7504
• .NET: Add CodeQL suppression for DevUI proxy validation by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7505
• .NET: Bound the tool-approval auto-approval loop (#7472) by @atty57 in https://github.com/microsoft/agent-framework/pull/7474
• .NET: Harden file skill discovery by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7540
• .NET: Give a hosted agent a single source of conversation history by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7525
• .NET: Aggregate usage across looping agents and chat clients by @westey-m in https://github.com/microsoft/agent-framework/pull/7539
• .NET: Store executable function calls bypassed by declaration-only tool calls by @westey-m in https://github.com/microsoft/agent-framework/pull/7388
• .NET: [BREAKING] Rename to AgentIsolationKeyProvider by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7567
• .NET: Improve string parsing in declarative workflows by @peibekwe in https://github.com/microsoft/agent-framework/pull/7535
• .NET: Add Cosmos NoSQL vector memory sample by @nos-redacted in https://github.com/microsoft/agent-framework/pull/7552
• .NET: Fix misleading workflow protocol attribute diagnostics by @peibekwe in https://github.com/microsoft/agent-framework/pull/7609 …

[1.14.0] - 2026-08-13

Added

• agent-framework-core, agent-framework-mistral: Add a Mistral chat client with native chat, streaming, tools, structured output, and embeddings support (#7392)
• agent-framework-core: Add experimental AGENT-HOOKS-0.1 enforcement middleware behind the opt-in agent-hooks extra (#7515)
• agent-framework-openai: Add request preparation and response parsing hooks to OpenAIChatCompletionClient (#7028)
• agent-framework-ag-ui: Add workflow checkpoint creation and resume support to AgentFrameworkWorkflow (#6646)
• agent-framework-core: Add BackgroundAgentsProvider.release_session() for safely cancelling work and releasing per-session runtime state (#7450)
• agent-framework-foundry-hosting: Add provider-based Foundry state stores for agent sessions, checkpoints, and function approvals (#7533)
• agent-framework-foundry: Export the Foundry hosted-agent session-state key used for service session continuity (#7608) …

What's Changed

• .NET and Python: Extract Durable Task and Azure Functions integrations by @cgillum in https://github.com/microsoft/agent-framework/pull/7465
• .NET: Fix Handoff orchestration sample not responding to user input by @peibekwe in https://github.com/microsoft/agent-framework/pull/7442
• .NET: Fail declarative workflows when an agent returns an error by @peibekwe in https://github.com/microsoft/agent-framework/pull/7497
• .NET: Updating version for dotnet release 1.17.0 by @peibekwe in https://github.com/microsoft/agent-framework/pull/7514

[1.13.0] - 2026-07-30

Added

• agent-framework-core, agent-framework-foundry-hosting: Add bounded, in-memory archive skill discovery for MCP sources and expose archive controls through FoundryToolbox (#7121)
• agent-framework-core, agent-framework-foundry-hosting, agent-framework-hosting, agent-framework-hosting-responses, agent-framework-hosting-telegram: Add reusable session stores and persist complete Foundry Responses sessions (#7306)
• agent-framework-a2a, agent-framework-ag-ui, agent-framework-anthropic, agent-framework-azure-ai-search, agent-framework-azure-contentunderstanding, agent-framework-azure-cosmos, agent-framework-azure-cosmos-memory, agent-framework-azurefunctions, agent-framework-bedrock, agent-framework-chatkit, agent-framework-claude, agent-framework-copilotstudio, agent-framework-core, agent-framework-declarative, agent-framework-devui, agent-framework-durabletask, agent-framework-foundry, agent-framework-foundry-hosting, agent-framework-foundry-local, agent-framework-gemini, agent-framework-github-copilot, agent-framework-hosting, agent-framework-hosting-a2a, agent-framework-hosting-mcp, agent-framework-hosting-responses, agent-framework-hosting-telegram, agent-framework-hyperlight, **agent-f…

What's Changed

• .NET: fix InMemoryChatHistoryProvider persisting when service stores history by @westey-m in https://github.com/microsoft/agent-framework/pull/7284
• .NET: Add TodoProvider and AgentModeProvider samples by @westey-m in https://github.com/microsoft/agent-framework/pull/7262
• .NET: Graduate GitHub Copilot agent to stable by @giles17 in https://github.com/microsoft/agent-framework/pull/7313
• .NET: Create session for tool approval agent when none provided by @westey-m in https://github.com/microsoft/agent-framework/pull/7310
• .NET: Add Microsoft.Agents.AI.LocalCodeAct to release solution filter by @westey-m with @Copilot in https://github.com/microsoft/agent-framework/pull/7343
• .NET: Preserve table state after declarative EditTable Add by @KXHXK in https://github.com/microsoft/agent-framework/pull/7324
• .NET: Forward A2A MessageSendParams.Configuration in the A2A adapter by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7365
• .NET: Workflows: quarantine flaky InputWaiter timeout test (#7360) by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7361
• .NET: Preserve table state across declarative EditTable operations  by @peibekwe in https://github.com/microsoft/agent-framework/pull/7353
• .NET: Add GitHub Copilot BYOK sample by @droideronline in https://github.com/microsoft/agent-framework/pull/7337 …

[1.12.1] - 2026-07-22

Added

• agent-framework-openai: Add explicit prompt cache breakpoints for GPT-5.6 models and a usage sample (#7163)

Changed

• agent-framework-ag-ui: Promote the package from release candidate to stable
• agent-framework-core: Add security guidance for custom MCP Streamable HTTP clients (#7245)

Fixed

• agent-framework-gemini: Preserve Gemini 3 thought signatures across function-call replays (#7095)
• agent-framework-core, agent-framework-foundry, agent-framework-foundry-hosting, agent-framework-openai: Fix stateless replay of reasoning-paired tool calls (#7233)

Full Changelog: https://github.com/microsoft/agent-framework/compare/python-1.12.0...python-1.12.1