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AI Agents Made Crystal Clear · chapter 1: The Agent Moment, and the Gap Nobody Mentions

The demo-to-production gap

2026-08-27

Read that list again and notice what is missing from it. Not one of those problems is a model problem. The model did not get worse between Friday and Monday. Figure 1.1 puts the two runs side by side and marks what actually changed.

Figure 1.1: The demo-to-production gap. The five rows of change are drawn from the Google Developers retrospective on refactoring a monolithic prototype (21 April 2026).
Figure 1.1: The demo-to-production gap. The five rows of change are drawn from the Google Developers retrospective on refactoring a monolithic prototype (21 April 2026).

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Every chapter opens with the gist, draws the hard ideas, and ends with recipes and sources.

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