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Database Migration

Database migration is the process of evolving a database schema over time through versioned, incremental change scripts that can be applied (and often rolled back) in order. Migration tools like Alembic (Python/SQLAlchemy), Prisma Migrate (TypeScript), and Flyway track which migrations have been applied and ensure consistent schema across environments. In AI applications, migrations manage conversation history tables, vector storage schemas, user preferences, agent run logs, and cost tracking records. Automated migration as part of CI/CD ensures database schema stays in sync with application code.

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