Time to First Hello Is a Product Metric

Why first success belongs on the product dashboard Developers evaluate an API long before procurement or roadmap reviews do. They evaluate it in the first session: can I understand this, can I make it work, and can I trust the behavior? The DevEx framework explains why this matters. Feedback loops determine how quickly a developer learns from an attempt. Cognitive load determines how much mental overhead the integration creates. Flow state determines whether the developer can stay focused long enough to reach success. A slow first-call path is rarely one bad doc page. It is usually the cumulative effect of…

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