Anthropic Agent Skills Support in Spring AI

Anthropic's agent skills allow LLMs to generate structured document files (DOCX, PDF, PPTX, XLSX) server-side without requiring libraries like Apache POI. Spring AI supports these pre-built skills via AnthropicChatOptions. A step-by-step tutorial walks through building a sales report generator: configuring the Anthropic dependency and API key, creating a data service, exposing an HTTP endpoint, and using AnthropicChatModel with multiple skills enabled. The chat model selects the appropriate format based on the user prompt, returns a file ID, and the app downloads the file via AnthropicApi. Examples show generating both a PDF report and an Excel spreadsheet with a bar chart from the same endpoint.