The same generate command emitted ? one run and $1 the next, which looked like non-determinism. It is not: postgres uses $1 placeholders where sqlite and mysql use ?, and the driver comes from the active profile, so building under a different profile rewrites this committed file. The header now records the dialect it was generated for, making the flip visible in the diff and explaining check:generated-types failures instead of leaving them looking like random churn. Worth deciding separately: a committed artifact whose contents depend on the active profile will keep drifting. Either generate per dialect, or stop committing it. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>