The Invisible Charge: How Claude Code's Billing Split Exposed Hidden Automation

Claude Code is separating subscription-covered interactive work from metered background automation, revealing hidden API usage patterns for developers running scheduled tasks or headless calls. This shift from flat-rate to metered pricing represents a critical wake-up call for anyone who built background automation without realizing it existed outside their subscription's coverage. Understanding this split is essential, as previously invisible background work now transforms into a trackable, billable operation that demands active oversight.