Show HN: Filling PDF forms with AI using client-side tool calling

A developer has built an AI assistant called SimplePDF Copilot that can interact with PDF editors using client-side tools, allowing for faster and more secure processing of sensitive documents. This is particularly useful for healthcare customers who require high levels of document privacy. The tool is built on top of the developer's existing SimplePDF platform, which is used by 200k+ people monthly. The demo is fully open source and available on Github. Users can point the AI model at any cloud provider or use a local model for added security.