Boolean Middleware Checks — Feature Flag Control for Checkout API Routes

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A feature flag on an e-commerce checkout path has one job before all others: make reversal faster and less risky than deployment. Put a boolean decision in middleware, evaluate it once per request from a local snapshot, attach the result and snapshot revision to request context, and emit bounded telemetry around the AI agent loop. Do not call a remote flag service from the route's hot path. TL;DR: treat is_enabled as a cached control input, not an authorization rule and not a network dependency. Disabled should skip the agent and preserve the established checkout path; enabled should enter the

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