Vibe Coding
Pattern: Token-Level Cost Observability Is Shipping Across Every Major Vendor at Once
Within four days: GitHub added per-model input/output/cache-read/cache-write breakdowns to the usage report (08-11), Copilot on web added a clickable token-spend indicator showing per-session and per-message quota (08-10), Devin Desktop began displaying ACU usage in the client (08-10), and Claude Code added gateway spend-limit support with reset times (08-08). The convergence signals that agent cost moved from a billing-page afterthought to an in-loop signal developers are expected to steer on. If your harness doesn't surface spend per turn, you're now behind the tooling baseline.
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