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README.md

@@ -20,6 +20,7 @@ A text classification model for content moderation with age-appropriate filterin
 - **Dual-mode filtering:** <13 (strict) vs 13+ (laxed)
 - **6 content categories:** Safe, Harassment, Swearing (reaction), Swearing (aggressive), Hate Speech, Spam
 - **PII Detection:** Emails, phones, addresses, credit cards, SSN
+- **Unicode Deobfuscation:** Detects circled letters (ⓕ), double-struck (ℂ), fullwidth, mathematical symbols
 - **Social Media Protection:** 
   - <13: Block all social media sharing
   - 13+: Allow, block only if grooming detected
@@ -49,16 +50,18 @@ result = filter.check("DM me privately, don't tell parents", age=14)
 # -> BLOCKED (grooming detected)
 ```
 
-## PII Detection Rules
+## Unicode Deobfuscation
 
-| PII Type | All Ages | Example |
-|----------|----------|---------|
-| Email | ❌ Block | `john@example.com` |
-| Phone | ❌ Block | `555-123-4567` |
-| Address | ❌ Block | `123 Main Street` |
-| Credit Card | ❌ Block | `4111-1111-1111-1111` |
-| SSN | ❌ Block | `123-45-6789` |
-| Social Media | Depends | See below |
+Automatically detects and normalizes unicode bypass attempts:
+
+| Technique | Example | Normalized |
+|-----------|---------|------------|
+| Circled letters | `ⓕⓤⓒⓚ` | `fuck` |
+| Double-struck | `ℂℍ` | `CH` |
+| Fullwidth | `Ｆ` | `F` |
+| Mathematical | `𝐟` | `f` |
+
+**All obfuscated text is normalized before moderation checks.**
 
 ## Social Media Rules