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Heuristic classifier falls back to AI only when it can't determine a category; unsubscribe confidence blends method reliability with an AI safety opinion and surfaces it in the Unsubscribe Manager; emails get an on-demand AI one-line summary in the detail pane. All AI calls degrade gracefully when AI is disabled or the provider errors. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>