Exercise 2: migrate dev vs. migrate deploy — Possible Solution ==================================================================== WHAT migrate dev DOES ------------------------------ prisma migrate dev is built for local development. It compares the current schema.prisma against the database's own migration history, can generate a brand-new migration file when it detects a real difference, applies it immediately, and - in certain drift situations, such as the local database having diverged from what the migration history expects - can prompt to reset the development database entirely and reapply every migration from scratch. WHAT migrate deploy DOES DIFFERENTLY ------------------------------ prisma migrate deploy only applies migration files that already exist, already committed, in prisma/migrations/. It never generates a new migration on its own, and it never prompts for confirmation or offers to reset anything - it simply applies whatever pending migrations exist and stops. WHY ONLY migrate deploy BELONGS IN A DEPLOYMENT SCRIPT ------------------------------ A deployment script runs unattended, against a real database holding real data. migrate dev's own behaviors - generating a migration on the fly, or resetting the database on drift - would be genuinely dangerous run automatically against production: an unattended reset could silently destroy real data, and there's no human present to answer a prompt that migrate dev might otherwise show. migrate deploy's more restrained, prompt-free behavior is exactly what a script running without a human watching actually needs. WHY THIS WORKS AS AN ANSWER ------------------------------ It correctly distinguishes what each command can do (generating migrations and resetting vs. only applying what's committed), and it correctly explains why the more powerful, interactive command is unsafe for an unattended production context specifically - not just that "deploy is the production one" without saying what makes it safer.