5 verification layers added to the 3-phase banner test:
1. DataLayer/GTM Interception: Proxy on window.dataLayer captures
all push() events. Distinguishes safe lifecycle events (gtm.js,
gtm.dom) from tracking events (page_view, conversion, purchase).
Flags tracking events before consent as violations.
2. localStorage/sessionStorage Monitoring: Intercepts setItem() to
detect tracking keys (_ga, _fbp, amplitude, mixpanel, etc.)
written before consent.
3. Google Consent Mode v2 Runtime Verification: Reads actual GCM
state (analytics_storage, ad_storage) per phase. Verifies
default=denied before consent, stays denied after reject,
switches to granted after accept.
4. TCF v2.2 State: Reads __tcfapi('getTCData') if available.
Verifies consent purpose states match user choice.
5. Cookie Attribute Analysis: Domain (1st vs 3rd party), expires
(>13 months), secure flag for tracking cookies.
10 new L2 checks with expert hints (EDPB, CNIL, §25 TDDDG).
All interceptor calls wrapped in try/except for graceful fallback.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New checks (from EUIPO reference case):
- Check 9: Third-party DSE link — detects when consent dialog links to
external domain's privacy policy instead of own DSE (Art. 13 DSGVO)
- Check 10: Dark-pattern language — detects "muessen/erforderlich" for
non-essential cookies suggesting false technical necessity (EDPB Rn. 70)
- Check 11: Non-modal dismiss = consent — detects when clicking outside
dialog closes it (possibly treating as consent, Planet49 violation)
Refactor: extracted _check_banner_text (375 LOC) from consent_scanner.py
into services/banner_text_checker.py to keep both files under 500 LOC.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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