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[ARTICLE · art-160103] src=dev.to ↗ pub= topic=ai-agents verified=true sentiment=↑ positive

Porting a PII tracer byte-exact from Python to TypeScript, so a coding agent cannot leak your secrets

A developer ported a PII tracer byte-exact from Python to TypeScript so it can run inside a coding agent's request pipeline rather than alongside it, aiming to strip secrets such as API keys before requests leave the machine. The approach relies on provable request sanitization instead of trusting a prompt to prevent leaks.

by read1 min views2 publishedOct 29, 2026

My coding agent is good at its job. It is also one cat .env away from sending my keys to a vendor. I did not want to trust a prompt for that. I wanted the request itself to be clean, provably, before it leaves.

This is the story of porting a PII tracer from Python to TypeScript - byte-exact - so it could run inside the agent's pipeline instead of next to it.

source & further reading
dev.to — original article Multi-Agent AI Systems: Build Without CrewAI or AutoGen How to Run a TopTier OpenSource Image Model Qwen-Image-2.1 on 10GB VRAM The 80% That Breaks AI Features: Building Production Agents Beyond Prompting
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