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Fix: address Greptile pattern feedback

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- Fix fr_phone: use negative lookbehind (?<!\d) to prevent false matches in digit strings
- Add keyword_pattern to eu_passport_generic to reduce false positives
- Add keyword_pattern to eu_vat for contextual matching

All pattern tests passing
This commit is contained in:
Ishaan Jaffer 2026-02-16 15:00:07 -08:00
parent 45b4a8b058
commit 3904312e93
1 changed files with 5 additions and 3 deletions
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8
litellm/proxy/guardrails/guardrail_hooks/litellm_content_filter/patterns.json
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@ -415,7 +415,7 @@
{
"name": "fr_phone",
"display_name": "Phone Number (France)",
"pattern": "(?:\\+33|0033|0)[1-9][0-9]{8}\\b",
"pattern": "(?<!\\d)(?:\\+33|0033|0)[1-9][0-9]{8}\\b",
"category": "EU PII Patterns",
"description": "Detects French phone numbers in various formats (+33, 0033, or 0 prefix followed by 9 digits starting with 1-9)"
},
@ -424,14 +424,16 @@
"display_name": "VAT Number (EU)",
"pattern": "\\b(AT|BE|BG|CY|CZ|DE|DK|EE|EL|ES|FI|FR|HR|HU|IE|IT|LT|LU|LV|MT|NL|PL|PT|RO|SE|SI|SK)[0-9A-Z]{8,12}\\b",
"category": "EU PII Patterns",
"description": "Detects EU VAT identification numbers (2-letter country code + 8-12 alphanumeric characters covering all EU member states)"
"description": "Detects EU VAT identification numbers (2-letter country code + 8-12 alphanumeric characters covering all EU member states)",
"keyword_pattern": "\\b(?:VAT|V\\.A\\.T\\.|TVA|IVA|BTW|MWST|value\\s*added\\s*tax|tax\\s*number|tax\\s*id|fiscal\\s*number|fiscal\\s*code)\\b"
},
{
"name": "eu_passport_generic",
"display_name": "Passport Number (EU Generic)",
"pattern": "\\b[0-9]{2}[A-Z]{2}[0-9]{5}\\b",
"category": "EU PII Patterns",
"description": "Detects generic EU passport format (2 digits + 2 letters + 5 digits) - covers France and similar EU formats"
"description": "Detects generic EU passport format (2 digits + 2 letters + 5 digits) - covers France and similar EU formats",
"keyword_pattern": "\\b(?:passport|passeport|travel\\s*document|document\\s*number|reisepass|paspoort|paszport)\\b"
},
{
"name": "fr_postal_code",