From Prompt to Proof: Building LLM governance with PII guardrails

Black_Dio · reddit · 2026-08-27

The author is sharing concepts from an upcoming PyCon Greece 2026 talk titled 'From Prompt to Proof: building and measuring the governance layer around LLMs'. This week's focus is implementing a PII guardrail in front of an LLM. The post details failure modes, implementation using Presidio, and precision/recall testing. Future updates will cover Cedar, OPA, and Microsoft Foundry.

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