1. Executive Summary

This codemod automates the migration from React Router v6 to v7 across seven distinct

transform categories — import rewrites, future flag injection for both JSX components and

data router function calls, deprecated API removal, fallback migration, and silent runtime

bug fixes. The key technical innovation is correctly splitting the RouterProvider import

to react-router/dom rather than react-router , a distinction every other published

codemod gets wrong, and which the official upgrade guide explicitly requires. Validated

against four real-world repositories spanning 461 total files, the codemod achieved

zero false positives and automated approximately 85–90% of all required migration changes.

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