Technical notes on web development, DevOps, and AI integration.
1 article
The down chain breaks mid-way: an old down migration inserts an ENUM value that no longer exists there. Checkpoint 56 is the tested safe window.
TL;DR: The migration roundtrip test stops at version 56 instead of unwinding to zero, because a cross-dependency between migrations 45 and 51 breaks any deeper descent. Version 56 is the deepest proven-safe checkpoint, verified with spot-checks on 8 tables and 12 columns. A separate test pins the dev-only login route to return 404 everywhere except development.