What's Changed
- .NET: Add session-persisted chat client routing by @westey-m in #7641
- .NET: Fix snake_case argument names in Harness file tool descriptions by @westey-m with @Copilot in #7731
- .NET: Pass IServiceProvider to ChatClientAgent in AddAIAgent overloads by @westey-m in #7737
- .NET: Python: Clarify PR review comment resolution by @moonbox3 in #7746
- .NET: Update AG-UI samples for latest MAF + AG-UI SDK and align with docs by @danroth27 in #7295
- .NET: Migrate remaining Foundry hosted samples to source deployment by @rogerbarreto in #7668
- .NET: agent-hooks interception contract as a first-class experimental feature by @MohammadHaroonAbuomar in #7564
- .NET: Forward AG-UI context and additional properties by @javiercn in #7742
- .NET: Suppress Swagger UI CodeQL alert in AgentWebChat sample by @SergeyMenshykh in #7764
- .NET: Remove AGUI history special cases from ChatClientAgent by @javiercn in #7741
- .NET: Fix A2A streaming artifact updates by @SergeyMenshykh in #7722
- Python: Harness blog part4 samples by @westey-m in #7698
- .NET: Clarify compaction provider and chat reducer choices by @ravikiranpagidi in #7678
- .NET: Add Azure Blob Storage session persistence by @DeagleGross in #1893
- .NET: Persist hosted agent state in Foundry by @rogerbarreto in #7649
- .NET: [BREAKING] Migrate MCP long-running task support to the 2026-07-28 Tasks extension by @peibekwe in #7774
- .NET: Add feature-usage bitmask by @peibekwe in #7709
- Bump Anthropic from 12.35.1 to 12.42.0 by @dependabot[bot] in #7778
- .NET: Fix ReasoningSummary passthrough in GitHub Copilot resume config by @chandramouleswaran in #6441
- .NET: Bump AgentMemory from 1.3.0 to 1.4.1 by @dependabot[bot] in #7639
- .NET: Add support for Resilient long-running and Steerable Foundry Hosted Agents by @rogerbarreto in #7370
- .NET: Update version for 1.19.0 release by @rogerbarreto in #7814
New Contributors
- @danroth27 made their first contribution in #7295
- @manjunathshiva made their first contribution in #7755
- @alexliluz made their first contribution in #7766
- @danfiedler-msft made their first contribution in #7768
- @ravikiranpagidi made their first contribution in #7678
- @cr-sbarbouche made their first contribution in #7734
- @ranst91 made their first contribution in #7423
- @qmuntal made their first contribution in #7754
Full Changelog: dotnet-1.18.0...dotnet-1.19.0