The Claude Guard That Stops Company Secrets Before You Hit Send
A small check that runs on your own computer every time you message Claude Code. If the message holds a client name, a price, a password or a key, it never leaves your laptop, and you see exactly which words to change
Most people who lose a job over AI do not get hacked. They paste a client email, a contract price or a login into a chat to save five minutes. Company rules usually say that data must never leave the building.
This guard reads every message you send to Claude Code first. If it finds a secret, the message is stopped before it reaches Claude and you get a list of the words to change. Clean messages go through as normal.
What the guard catches
| Example | What happens | |
|---|---|---|
| Client and project names you list | Acme Corp, Project Falcon | Blocked, name shown |
| Prices and money amounts | $48,000 or $12k | Blocked |
| Password lines | password: hunter2 | Blocked |
| API keys and private keys | sk-..., AKIA..., ghp_... | Blocked, key cut short in the warning |
| A normal question | Write a haiku about autumn | Goes through |
Free, for your email
Get the full setup steps + the copy-paste setup prompt
The rest of this guide (4 more sections, 3 copy-paste prompts) opens right here. The setup prompt, one paste into Claude that sets it all up, comes by email only. Use your real address.
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