Show HN: Spring AI Privacy Guardrails – PII, tool permissions, content checks

This project adds privacy protection, tool authorization and content inspection to Spring AI applications: detected PII is tokenized before reaching the model and originals are revealed only to tools that need them. Tool visibility and execution are limited by the current user's permissions via Spring Security, and requests and responses can be checked with rules, local ONNX or an HTTP guard model. It requires Java 17, Spring AI 2.0.0 and Spring Boot 4.0.0 or later, and is available as a client starter at version 0.4.0.