Turn Any Interface Into an AI Tool — Shiny DI 3.0

Writing AIFunction subclasses by hand for every operation you want to expose to an LLM is tedious and error-prone. Shiny DI 3.0 adds a [Tool] attribute to your existing service interfaces, and the source generator produces the AI tool adapters automatically — complete with metadata, argument parsing, and registration.

What you’ll learn

• How [Tool] on an interface and [Description] on methods/parameters drives AI tool generation
• How the source generator produces AIFunction subclasses with typed metadata and argument extraction
• AOT-safe argument extraction: direct JsonElement accessors for standard types, no reflection
• How CancellationToken parameters are handled automatically without being exposed to the LLM
• Conditional generation: AI tool code only emits when Microsoft.Extensions.AI is referenced
• How AddGeneratedAITools() registers all generated tools as transient AITool services