---
description: Turn a block of text (ticket, log, email) into an aliased version safe to paste
---

The user has text containing sensitive data and needs an aliased version they can
send. A hook cannot rewrite a prompt, only block it, so this is the supported route.

Ask the user to paste the text into a file (or use text they already have on disk),
then run:

```
python3 "${CLAUDE_PLUGIN_ROOT}/scripts/ctxguard.py" sanitize < <file>
```

The aliased text goes to stdout; a per-rule summary goes to stderr.

Note: only values already in the dictionary become aliases. Credentials and PII are
detected by pattern regardless. If a company or person came through untouched, it is
not registered yet — offer `/ctx-entity`.