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Bilal Nazer Ali dfc81dea28 Add PII redaction POC for secure LLM prompting.

Implements detect-redact-sanitize pipeline with regex, domain rules, and ONNX NER before the LLM boundary, plus NUnit tests and Xenovex push documentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-07-07 13:05:07 +05:30

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Git setup — Xenovex (xts.xenovex.com)

This repository is ready for push to your Xenovex Git server after you create a remote repository.

Prerequisites

Git 2.x (installed at C:\Program Files\Git\bin\git.exe)
Access to https://xts.xenovex.com/explore/repos
.NET 10 SDK for build/test

1. Create the remote repository

Sign in to https://xts.xenovex.com
Open Explore repos (or New repository)
Create a new empty repository, e.g. llm-pii-poc
Copy the HTTPS or SSH clone URL (example shapes):
- https://xts.xenovex.com/<org-or-user>/llm-pii-poc.git
- git@xts.xenovex.com:<org-or-user>/llm-pii-poc.git

Do not initialize the remote with a README if you are pushing an existing local history.

2. Add remote and push (from repository root)

cd C:\Users\bilal.n\Projects\llm-pii-poc

# Use full path if git is not on PATH
$git = "C:\Program Files\Git\bin\git.exe"

& $git remote add origin <YOUR_CLONE_URL>
& $git branch -M main
& $git push -u origin main

If the remote already has commits (e.g. auto-generated README), either use an empty remote or:

& $git pull origin main --rebase
& $git push -u origin main

3. What is committed vs excluded

Included	Excluded (`.gitignore`)
Source (`src/`), tests, scripts, docs	`bin/`, `obj/`, `.vs/`
`README.md`, `PiiRedaction.slnx`	`models/*.onnx`, `vocab.txt`, `ner-labels.txt` (~431MB model)
`models/.gitkeep` (empty models folder)	`scratch/`

After clone, download the NER model locally:

.\scripts\download-ner-model.ps1

4. Verify after clone

dotnet build
dotnet test
dotnet run --project src/PiiRedaction.ConsoleApp -- --sample 0

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