Show HN: Noisegate – a differential-privacy gateway for untrusted AI agents

Noisegate is a differential-privacy gateway designed to provide AI agents with query access to sensitive data, ensuring that no individual's record can leak. It achieves this through a trusted privacy engine that clamps data to declared ranges, adds calibrated Laplace noise, and decrements a budget. The system includes a validation/guardrail layer for policy checks and handles untrusted LLM compiler output by emitting a CONSTRAINED QUERY AST, not free SQL, via structured/schema-forced output.