PII guard for Claude Code to keep client data out of context
Open-source plugin that redacts PII before Claude Code reads it. Names, emails, and IBANs become placeholders Claude sees; you reveal originals locally. Same engine ships as a CLI for any LLM and a hosted proxy for OpenAI/Anthropic/Azure.
Hey — I built noirdoc because I kept seeing the same pattern on consulting engagements: a team wants to use Claude on a real customer ticket, and Legal kills it because the prompt would leak names, IBANs, and addresses to a third party.
The plugin is a PreToolUse hook for Claude Code. When Claude tries to read a file from a path you mark sensitive, the plugin redacts it first — names become `<>`, IBANs become `<>` — Claude works on the placeholders, and you reveal the originals locally in your own terminal. Real names never enter Claude's transcript.
Detection runs locally — Presidio + Flair + GLiNER ensemble, German-tuned (it handles "Müller, Anna" and lowercase legal text where most tools fail). Reversible, with consistent placeholders across sessions.
Same engine ships three ways: this plugin (OSS), a CLI on PyPI for any LLM workflow (OSS), and a hosted proxy that does the same thing transparently for OpenAI / Anthropic / Azure calls if your team needs that.
Curious what you'd want it to redact next — what's the data you can't paste into an LLM today?
About noirdoc on Product Hunt
“PII guard for Claude Code to keep client data out of context”
noirdoc launched on Product Hunt on April 29th, 2026 and earned 78 upvotes and 5 comments, placing #14 on the daily leaderboard. Open-source plugin that redacts PII before Claude Code reads it. Names, emails, and IBANs become placeholders Claude sees; you reveal originals locally. Same engine ships as a CLI for any LLM and a hosted proxy for OpenAI/Anthropic/Azure.
On the analytics side, noirdoc competes within Open Source, Privacy, Developer Tools and GitHub — topics that collectively have 632.2k followers on Product Hunt. The dashboard above tracks how noirdoc performed against the three products that launched closest to it on the same day.
Who hunted noirdoc?
noirdoc was hunted by Antonio Maiolo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of noirdoc including community comment highlights and product details, visit the product overview.
Antonio Maiolo