2025-10-03

Local PII Pre-Filter with Microsoft Presidio and Qwen 2.5

A local pre-prompt guardrail using Presidio and a small CPU model to reduce PII exposure before LLM calls.

A small local pre-filter can catch deterministic and fuzzy PII before content reaches an LLM. The pattern fits pre-ingest, pre-prompt, and guardrail-loop stages where auditability matters.