microsoft-extensions-ai

# Microsoft.Extensions.AI ## Trigger On - building or reviewing `.NET` code that uses `Microsoft.Extensions.AI`, `Microsoft.Extensions.AI.Abstractions`, `IChatClient`, `IEmbeddingGenerator`, `ChatOptions`, or `AIFunction` - adding `IImageGenerator`, local-model chat via Ollama, AI app templates, or the `.NET AI` quickstarts for assistants and MCP - choosing between low-level AI abstractions, provider SDKs, vector-search composition, evaluation libraries, and a fuller agent framework - adding streaming chat, structured output, embeddings, tool calling, telemetry, caching, or DI-based AI middleware - wiring `Microsoft.Extensions.VectorData`, `Microsoft.Extensions.DataIngestion`, MCP tooling, or evaluation packages around a provider-agnostic AI app ## Workflow 1. Classify the request first: plain model access, tool calling, embeddings/vector search, evaluation, image generation, local-model prototyping, MCP bootstrap, or true agent orchestration. 2. Default to `Microsoft.Extensions.AI` for application and service code that needs provider-agnostic chat, embeddings, middleware, structured output, and testability. 3. Reference `Microsoft.Extensions.AI.Abstractions` directly only when authoring provider libraries or lower-level reusable integration packages. 4. Model `IChatClient` and `IEmbeddingGenerator` composition explicitly in DI. Keep options, caching, telemetry, logging, and tool invocation inspectable in the pipeline. 5. Treat chat state deliberately. For stateless provi...