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This pipeline cannot carry a false boolean. Measured across 218,400,577 spans, not one carries vBool=false - proto3 omits the bool zero value, so false is never serialized and arrives as the key simply being absent. "Memory disabled" was therefore structurally unrepresentable, and presence had to stand in for the value, which is why crew_memory read 1 for 99.8% of crews against a field that defaults to False. The fix is the convention this file already documents and applies to `resumed` and `conversational`; crew_memory is the attribute those comments name as the outstanding case. It was the only remaining CrewAI-emitted boolean attribute - checked empirically: every other attribute appearing in vBool comes from third-party instrumentation. Truthiness rather than `is True`, per the decision that memory counts as enabled when set by any means: a Memory, MemoryScope or MemorySlice instance is enabled just as much as `memory=True`. None of those classes defines __bool__ or __len__, so an instance is always truthy. Tests cover all four inputs - True, False, None and an instance - and reuse the existing guard that no attribute is ever passed as a bare boolean. Verified they fail against the unpatched emitter. Claude-Session: https://claude.ai/code/session_01RfV2uMqWRcdfufMvtdCVoN Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>