Claude Code user hit by Opus 5.5 safeguards falsely flagging QuickBooks file comparisons as 'cyber'
CtrlAltDwayne · x · 2026-10-22
User CtrlAltDwayne reports that Claude Code, after running file comparisons for 10 hours, kept getting blocked by Opus 5.5's stricter safeguards. The error message admits the new guardrails "can sometimes flag non-cybersecurity work" — the flagged content was just QuickBooks files. The same block fired repeatedly, derailing a full day of work, in a vivid example of false positives from the tightened Opus 5.5 safety layer.
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