A two-phase lint for catching factual drift in hand-maintained static HTML SEO content

Short summary

The author discovered that pre-rendered static HTML mirrors on their Blazor WASM site had drifted from correct razor sources, showing false Indian tax claims about Section 80CCD(1B). After a manual fix missed three additional pages, they built a two-phase PowerShell lint: first finding suspicious co-occurrences of deduction names near 'New Regime', then filtering out safe-indicator words like 'disallow' or 'not allowed'. The approach catches factual drift in hand-maintained SEO content that regex alone cannot.

• •Static HTML mirrors drifted from correct razor sources, showing false Indian tax claims across multiple pages
• •Manual sweep missed three additional pages with identical errors
• •Two-phase lint pattern: wide-net co-occurrence detection, then safe-indicator filtering to exclude negations

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