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The mutation battery prints the distinct findings each mutation caused, matched on the finding's KIND. The pattern's character class was `[A-Z -]`, which has no underscore - so `UNIQUE_ID DRIFT:` did not match, and M7, the mutation that renames `mqtt.BASE`, printed its verdict with no evidence under it at all. A filter that silently drops the very finding a mutation exists to produce is the same defect as the rest of this card, at display scale. No behaviour change: M7 was red before and is red now, and it now shows why. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BwRLw7eKYj2byVdwB6kbjU