Your first engineering hire inherits an AI-built codebase: what has to be ready on day one? (2026)

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Originally published at systemtrails.com. Before your first engineer starts on an AI-built codebase, six things should be ready: a README that runs the app locally, a one-page architecture map, a decisions log, tests on the money path and tenant isolation, a deploy-and-restore runbook, and a list of who can touch production. With those, a good hire ships a real change in week one. Without them, they spend a month reverse-engineering code nobody on the team fully wrote, and start asking about a rewrite. In short The risk is not the code quality, it is the missing why.

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