Add mock AI providers for templates and testing by jeffhandley · Pull Request #7657 · dotnet/extensions

jeffhandley · Jul 25, 2026

Summary

Add the preview Microsoft.Extensions.AI.Testing package with experimental MockChatClient and MockEmbeddingGenerator<TInput> APIs.
Add dictionary and KeyValuePair response seeding to MockChatClient for JSON-friendly plain-text fixtures with customizable request matching.
Add deterministic mock providers to the aichatweb and aiagent-webapi templates, including citations, retrieval/tool flows, and the writing workflow.
Remove GitHub Models from both templates and require an explicit provider.

Validation

Microsoft.Extensions.AI.Testing.Tests across supported target frameworks.
All aichatweb and aiagent-webapi template execution configurations.
Fresh mock-template generation, restore, build, and browser functional checks for citations, search/ingestion, and DevUI writer/editor/publisher flows.

aichatweb project demo

aiagent-webapi project demo

Copilot

Pull request overview

This PR introduces a new preview testing surface for Microsoft.Extensions.AI and updates the aichatweb / aiagent-webapi templates (and their snapshot-based integration tests) to support a deterministic local mock provider while removing GitHub Models as a default.

Changes:

Add preview Microsoft.Extensions.AI.Testing with mock implementations (e.g., MockChatClient, MockEmbeddingGenerator<TInput>), plus a new test project for it.
Update project templates to require an explicit --provider and add a deterministic mock provider path (including citations/retrieval/tooling flows).
Update template infrastructure + integration-test snapshots/execution matrices to reflect the new provider options and template outputs.

Reviewed changes

Copilot reviewed 141 out of 209 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Services/SemanticSearch.cs	Snapshot update for semantic search service behavior in OpenAI variant.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Services/Ingestion/PdfPigReader.cs	Snapshot update for PDF ingestion reader.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Services/Ingestion/DocumentReader.cs	Snapshot update for document reader routing by media type.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Services/Ingestion/DataIngestor.cs	Snapshot update for ingestion pipeline wiring.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Services/IngestedChunk.cs	Snapshot update for vector record shape for ingestion/search.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/README.md	Snapshot update for provider configuration instructions.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Properties/launchSettings.json	Snapshot update for launch profiles.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Program.cs	Snapshot update switching from GitHub Models to OpenAI configuration.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Routes.razor	Snapshot update for routing component.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Error.razor	Snapshot update for error page.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatSuggestions.razor.css	Snapshot update for chat suggestions styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor.js	Snapshot update for chat auto-scroll JS module.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor.css	Snapshot update for message list styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor	Snapshot update for message list component.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatInput.razor.js	Snapshot update for chat input JS behaviors.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatInput.razor.css	Snapshot update for chat input styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatInput.razor	Snapshot update for chat input component.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatHeader.razor.css	Snapshot update for header styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatHeader.razor	Snapshot update for header component.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/ChatCitation.razor.css	Snapshot update for citation styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Pages/Chat/Chat.razor.css	Snapshot update for chat footer container styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Layout/MainLayout.razor.css	Snapshot update for layout error UI styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Layout/MainLayout.razor	Snapshot update for layout error UI markup.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/Layout/LoadingSpinner.razor	Snapshot update for loading spinner.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/App.razor	Snapshot update for app host page markup.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/Components/_Imports.razor	Snapshot update for component imports.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/appsettings.json	Snapshot update for runtime settings.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/appsettings.Development.json	Snapshot update for dev settings.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai.verified/aichatweb/aichatweb.csproj	Snapshot update for template project dependencies.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai_aais.verified/aichatweb/Components/Pages/Chat/ChatMessageItem.razor	Snapshot update for citation parsing/markup handling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai_aais.verified/aichatweb/Components/Pages/Chat/Chat.razor	Snapshot update for XML-safe tool result formatting and survey removal.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai_aais.verified/aichatweb/Components/Layout/SurveyPrompt.razor.css	Snapshot removal of survey prompt styling.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.oai_aais.verified/aichatweb/Components/Layout/SurveyPrompt.razor	Snapshot removal of survey prompt component.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.o_q.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageItem.razor	Snapshot update for citation parsing/markup handling (Aspire/Qdrant variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.o_q.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/Chat.razor	Snapshot update for XML-safe tool result formatting and survey removal (Aspire/Qdrant variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.o_q.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor.css	Snapshot removal of survey prompt styling (Aspire/Qdrant variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.o_q.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor	Snapshot removal of survey prompt component (Aspire/Qdrant variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Services/SemanticSearch.cs	Snapshot update for semantic search service behavior in mock-provider variant.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Services/Ingestion/PdfPigReader.cs	Snapshot update for PDF ingestion reader (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Services/Ingestion/DocumentReader.cs	Snapshot update for document reader routing by media type (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Services/Ingestion/DataIngestor.cs	Snapshot update for ingestion pipeline wiring (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Services/IngestedChunk.cs	Snapshot update for vector record shape (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/README.md	Snapshot update documenting mock provider usage.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Properties/launchSettings.json	Snapshot update for launch profiles (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Program.cs	Snapshot update wiring mock chat + embedding providers.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Routes.razor	Snapshot update for routing component (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Error.razor	Snapshot update for error page (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatSuggestions.razor.css	Snapshot update for chat suggestions styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor.js	Snapshot update for chat auto-scroll JS module (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor.css	Snapshot update for message list styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatMessageList.razor	Snapshot update for message list component (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatMessageItem.razor	Snapshot update for citation parsing/markup handling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatInput.razor.js	Snapshot update for chat input JS behaviors (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatInput.razor.css	Snapshot update for chat input styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatInput.razor	Snapshot update for chat input component (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatHeader.razor.css	Snapshot update for header styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatHeader.razor	Snapshot update for header component (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatCitation.razor.css	Snapshot update for citation styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/ChatCitation.razor	Snapshot update adding citation viewer link generation (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/Chat.razor.css	Snapshot update for chat footer container styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Pages/Chat/Chat.razor	Snapshot update for XML-safe tool result formatting and survey removal (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Layout/MainLayout.razor.css	Snapshot update for layout error UI styling (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Layout/MainLayout.razor	Snapshot update for layout error UI markup (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/Layout/LoadingSpinner.razor	Snapshot update for loading spinner (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/App.razor	Snapshot update for app host page markup (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/Components/_Imports.razor	Snapshot update for component imports (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/appsettings.json	Snapshot update for runtime settings (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/appsettings.Development.json	Snapshot update for dev settings (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.mock.verified/aichatweb/aichatweb.csproj	Snapshot update adding `Microsoft.Extensions.AI.Testing` dependency (mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor.css	Snapshot removal of survey prompt styling (Aspire variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor	Snapshot removal of survey prompt component (Aspire variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/README.md	Snapshot update documenting mock provider usage (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Services/SemanticSearch.cs	Snapshot update for semantic search service (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Services/Ingestion/DocumentReader.cs	Snapshot update for MarkItDown MCP PDF reading (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Services/Ingestion/DataIngestor.cs	Snapshot update for ingestion pipeline wiring (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Services/IngestedChunk.cs	Snapshot update for vector record key type (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Properties/launchSettings.json	Snapshot update for launch profiles (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Program.cs	Snapshot update wiring mock providers into Aspire-hosted web app.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Routes.razor	Snapshot update for routing component (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Error.razor	Snapshot update for error page (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatSuggestions.razor.css	Snapshot update for chat suggestions styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageList.razor.js	Snapshot update for chat auto-scroll JS module (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageList.razor.css	Snapshot update for message list styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageList.razor	Snapshot update for message list component (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageItem.razor	Snapshot update for citation parsing/markup handling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatInput.razor.js	Snapshot update for chat input JS behaviors (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatInput.razor.css	Snapshot update for chat input styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatInput.razor	Snapshot update for chat input component (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatHeader.razor.css	Snapshot update for header styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatHeader.razor	Snapshot update for header component (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatCitation.razor.css	Snapshot update for citation styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/Chat.razor.css	Snapshot update for chat footer container styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/Chat.razor	Snapshot update for XML-safe tool result formatting and survey removal (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Layout/MainLayout.razor.css	Snapshot update for layout error UI styling (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Layout/MainLayout.razor	Snapshot update for layout error UI markup (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/Layout/LoadingSpinner.razor	Snapshot update for loading spinner (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/App.razor	Snapshot update for app host page markup (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/Components/_Imports.razor	Snapshot update for component imports (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/appsettings.json	Snapshot update for runtime settings (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/appsettings.Development.json	Snapshot update for dev settings (Aspire/mock variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.Web/aichatweb.Web.csproj	Snapshot update adding `Microsoft.Extensions.AI.Testing` dependency (Aspire/mock web).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.ServiceDefaults/aichatweb.ServiceDefaults.csproj	Snapshot addition/updates for Aspire service defaults project.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.AppHost/Properties/launchSettings.json	Snapshot update for Aspire AppHost launch settings.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.AppHost/appsettings.json	Snapshot update for AppHost runtime settings.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.AppHost/appsettings.Development.json	Snapshot update for AppHost dev settings.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.AppHost/AppHost.cs	Snapshot update removing OpenAI connection string dependency for mock provider.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_mock.verified/aichatweb/aichatweb.AppHost/aichatweb.AppHost.csproj	Snapshot update for AppHost project structure.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_aoai_aais.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/ChatMessageItem.razor	Snapshot update for citation parsing/markup handling (AOAI/AAIS variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_aoai_aais.verified/aichatweb/aichatweb.Web/Components/Pages/Chat/Chat.razor	Snapshot update for XML-safe tool result formatting and survey removal (AOAI/AAIS variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_aoai_aais.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor.css	Snapshot removal of survey prompt styling (AOAI/AAIS variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb.A_aoai_aais.verified/aichatweb/aichatweb.Web/Components/Layout/SurveyPrompt.razor	Snapshot removal of survey prompt component (AOAI/AAIS variant).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb._defaults.verified/aichatweb/README.md	Snapshot removal of default GitHub Models README guidance.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb._defaults.verified/aichatweb/Components/Layout/SurveyPrompt.razor.css	Snapshot removal of survey prompt styling (defaults).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/aichatweb/aichatweb._defaults.verified/aichatweb/Components/Layout/SurveyPrompt.razor	Snapshot removal of survey prompt component (defaults).
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/AIChatWebSnapshotTests.cs	Update snapshot coverage to include explicit mock/openai provider args and Aspire+mock.
test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/AIChatWebExecutionTests.cs	Update execution matrix to include `mock` provider and remove GitHub Models.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.oai.verified/aiagent-webapi/README.md	Snapshot update removing GitHub Models from provider docs and adding mock provider.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.oai.verified/aiagent-webapi/Program.cs	Snapshot update adding DevUI registration.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.o.verified/aiagent-webapi/README.md	Snapshot update removing GitHub Models from provider docs and adding mock provider.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.o.verified/aiagent-webapi/Program.cs	Snapshot update adding DevUI registration.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.mock.verified/aiagent-webapi/Properties/launchSettings.json	Snapshot update for DevUI launch URL and profiles (mock).
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.mock.verified/aiagent-webapi/Program.cs	Snapshot update wiring mock provider and adding DevUI registration.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.mock.verified/aiagent-webapi/appsettings.json	Snapshot update for runtime settings (mock).
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.mock.verified/aiagent-webapi/aiagent-webapi.csproj	Snapshot update adding `Microsoft.Extensions.AI.Testing` dependency (mock).
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.aoai_ID_T.verified/aiagent-webapi/README.md	Snapshot update removing GitHub Models from provider docs and adding mock provider.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.aoai_ID_T.verified/aiagent-webapi/Program.cs	Snapshot update adding DevUI registration.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.aoai_ID_F.verified/aiagent-webapi/README.md	Snapshot update removing GitHub Models from provider docs and adding mock provider.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/Snapshots/aiagent-webapi/aiagent-webapi.aoai_ID_F.verified/aiagent-webapi/Program.cs	Snapshot update adding DevUI registration.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/AIAgentWebAPISnapshotTests.cs	Update snapshot coverage to include explicit mock provider args.
test/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.IntegrationTests/AIAgentWebAPIExecutionTests.cs	Update execution matrix to include `mock` provider and remove GitHub Models.
test/ProjectTemplates/Infrastructure/TemplateSnapshotTestBase.cs	Make template package resolution cross-platform by resolving to a concrete `.nupkg` path.
test/Libraries/Microsoft.Extensions.DataIngestion.Tests/Writers/SqliteVectorStoreWriterTests.cs	Switch test harness to `MockEmbeddingGenerator` from the new testing package.
test/Libraries/Microsoft.Extensions.DataIngestion.Tests/Writers/InMemoryVectorStoreWriterTests.cs	Switch test harness to `MockEmbeddingGenerator` from the new testing package.
test/Libraries/Microsoft.Extensions.DataIngestion.Tests/Utils/TestEmbeddingGenerator.cs	Remove local test embedding generator in favor of `Microsoft.Extensions.AI.Testing`.
test/Libraries/Microsoft.Extensions.DataIngestion.Tests/Microsoft.Extensions.DataIngestion.Tests.csproj	Add reference to `Microsoft.Extensions.AI.Testing` and remove embedded test generator compile include.
test/Libraries/Microsoft.Extensions.DataIngestion.Tests/Chunkers/SemanticSimilarityChunkerTests.cs	Update chunker tests to use `MockEmbeddingGenerator` and factor helper generator creation.
test/Libraries/Microsoft.Extensions.AI.Tests/MockEmbeddingGeneratorAlias.cs	Add alias to preserve `TestEmbeddingGenerator` naming expectations in tests.
test/Libraries/Microsoft.Extensions.AI.Tests/Microsoft.Extensions.AI.Tests.csproj	Add reference to `Microsoft.Extensions.AI.Testing` and remove old embedded embedding generator compile include.
test/Libraries/Microsoft.Extensions.AI.Testing.Tests/Microsoft.Extensions.AI.Testing.Tests.csproj	Add new test project for the new testing package.
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/TestEmbeddingGenerator.cs	Remove old test embedding generator type in favor of `Microsoft.Extensions.AI.Testing`.
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Microsoft.Extensions.AI.Abstractions.Tests.csproj	Add reference to `Microsoft.Extensions.AI.Testing`.
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Embeddings/GeneratedEmbeddingsTests.cs	Update embedding tests to use `MockEmbeddingGenerator`.
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Embeddings/EmbeddingGeneratorExtensionsTests.cs	Update extension tests to use `MockEmbeddingGenerator`.
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Embeddings/DelegatingEmbeddingGeneratorTests.cs	Update delegating generator tests to use `MockEmbeddingGenerator`.
src/Shared/DiagnosticIds/DiagnosticIds.cs	Add new experimental diagnostic ID for AI Testing APIs.
src/ProjectTemplates/README.md	Update template docs to require `--provider` and list new `mock` option.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/README.Aspire.md	Add mock-provider instructions and gate provider-key note for non-mock configs.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Services/IngestedChunk.cs	Add conditional key typing in the template’s vector record model.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/README.md	Add mock-provider instructions and gate provider-key note for non-mock configs.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Program.cs	Remove GitHub Models path; add mock-provider wiring; keep OpenAI/AOAI/Ollama options.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Program.Aspire.cs	Add mock-provider wiring for Aspire scenario.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Components/Pages/Chat/ChatMessageItem.razor	Make citation parsing more robust by using XML parsing + broader regex match.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Components/Pages/Chat/Chat.razor	Make tool result output XML-safe and remove survey prompt usage.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Components/Layout/SurveyPrompt.razor.css	Remove survey prompt styling from template output.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Components/Layout/SurveyPrompt.razor	Remove survey prompt component from template output.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/AIChatWeb-CSharp.Web.csproj-in	Add conditional dependency on `Microsoft.Extensions.AI.Testing` for mock provider.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.AppHost/AppHost.cs	Remove GitHub Models wiring and add mock-aware conditional branches.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/templates/AIChatWeb-CSharp/.template.config/template.json	Make provider required; add `mock` choice; add mock-only file inclusion/exclusion rules.
src/ProjectTemplates/Microsoft.Extensions.AI.Templates/Microsoft.Extensions.AI.Templates.csproj	Add project reference to `Microsoft.Extensions.AI.Testing` for packaging templates.
src/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates/templates/AIAgentWebApi-CSharp/Program.cs	Remove GitHub Models wiring; add mock-provider wiring; add DevUI registration.
src/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates/templates/AIAgentWebApi-CSharp/AIAgentWebApi-CSharp.csproj-in	Add conditional dependency on `Microsoft.Extensions.AI.Testing` for mock provider.
src/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates/templates/AIAgentWebApi-CSharp/.template.config/template.json	Make provider required; add `mock` choice; add mock-only file inclusion/exclusion rules.
src/ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates/Microsoft.Agents.AI.ProjectTemplates.csproj	Add project reference to `Microsoft.Extensions.AI.Testing` for packaging templates.
src/Libraries/Microsoft.Extensions.AI.Testing/Microsoft.Extensions.AI.Testing.csproj	Add new preview library project for deterministic AI testing mocks.
.github/agents/release-manager/write-release-notes/references/package-areas.md	Add `Microsoft.Extensions.AI.Testing` to package-area mapping.
.github/agents/release-manager/write-release-notes/references/collect-prs.md	Add servicing backport scope/attribution override guidance.
.github/agents/release-manager/write-release-notes/README.md	Add servicing backport release-notes guidance and tag preflight instructions.
.github/agents/release-manager/validate-release/references/stage-7-support-page.md	Update Stage 7 guidance to branch by monthly/servicing + new-package presence.
.github/agents/release-manager/validate-release/README.md	Align validate-release playbook with conditional Stage 7 handling.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

…rary Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Introduces the 'mock' provider option (--provider mock) to the aichatweb project template. The mock provider uses Microsoft.Extensions.AI.Testing's MockChatClient seeded with ~20 canned responses about the TrailMaster X4 GPS Watch, allowing the template to be used without any external AI provider credentials while still demonstrating the full chat experience with citations, suggestions, and vector-based semantic search. Also updates the Aspire test scenario to use --provider=mock instead of --provider=openai, and adds a test for the plain --provider=openai scenario. Updates the TemplateSnapshotTestBase to resolve template package paths using file timestamps rather than wildcard paths, improving cross-platform reliability. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Introduces the 'mock' provider option (--provider mock) to the aiagent-webapi project template. The mock provider uses Microsoft.Extensions.AI.Testing's MockChatClient seeded with 3 canned responses for the story writer/editor workflow (generate a story, edit for tone, format as HTML), allowing the template to be explored without any external AI provider credentials while still demonstrating the multi-agent pipeline with writer and editor stages. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

jozkee · Jul 27, 2026

If MEAI.Testing is only for MEAI.Templates, it may be better to avoid adding a new package and instead emit all scaffolding in each template output.

jeffhandley · Jul 27, 2026

I considered that too, @jozkee. But I liked the idea of having mock providers we can use ourselves within our own tests, and also for customers to use in theirs. We also have documentation showing how to build Console-app chat clients and other walkthroughs that don't rely on the templates, where the mocks are valuable as well. The package also lets customers add the provider in after project creation.

I hadn't previously realized we already have the precedent of the testing packages out of this repo, so I was comfortable following that direction.

luisquintanilla

LGTM. Thanks @jeffhandley

Copilot AI review requested due to automatic review settings July 25, 2026 00:28

jeffhandley requested review from a team as code owners July 25, 2026 00:28

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Comment thread ...sions.AI.Templates/templates/AIChatWeb-CSharp/AIChatWeb-CSharp.Web/Services/IngestedChunk.cs Outdated

jeffhandley mentioned this pull request Jul 25, 2026

MockChatClient Prototype jeffhandley/extensions#21

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jeffhandley and others added 3 commits July 25, 2026 21:56

Remove GitHub Models from aichatweb template

b91c1ba

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Remove GitHub Models from aiagent-webapi template

df7eb8d

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Introduce MockChatClient in a new Microsoft.Extensions.AI.Testing lib…

56e07a5

…rary Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

jeffhandley force-pushed the jeffhandley/mock-chat-client-plan branch 3 times, most recently from be9defc to 66a64dc Compare July 26, 2026 04:58

jeffhandley and others added 6 commits July 25, 2026 22:01

Introduce MockEmbeddingGenerator within the MEAI.Testing library

5dbfe40

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Mark MEAI.Testing as preview with Experimental APIs

b4bfef9

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Fix local SQLite template key type

9b8efd4

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

Add dictionary response seeding to MockChatClient

f454867

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: dc263661-1b95-4f80-a7f4-3a4d3cd275ff

jeffhandley force-pushed the jeffhandley/mock-chat-client-plan branch from 66a64dc to f454867 Compare July 26, 2026 05:02

Dispose mock clients in README sample tests

829ceff

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jeffhandley requested review from jozkee and luisquintanilla July 27, 2026 11:51

luisquintanilla approved these changes Jul 28, 2026

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Add mock AI providers for templates and testing - #7657

Add mock AI providers for templates and testing#7657
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aichatweb project demo

aiagent-webapi project demo

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