CAS-Protected Status Transitions in Client Management

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The Problem: Race Conditions in Multi-Channel Conversations When an Indian SMB manages customer conversations across WhatsApp, Instagram DM, SMS, and email simultaneously, state changes collide. A customer confirms a booking on WhatsApp while an agent marks it cancelled in the dashboard. A payment webhook arrives milliseconds after a manual refund. Without coordination, the last write wins — leaving the business with a confirmed appointment that was actually cancelled, or a payment marked paid after a refund. GoSumo's recent commits address this across four domains: booking, payment, conversat

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