MigrationConfig

The user-authored form of a single migration — an entry of MigrationPackageConfig.migrations, or the shape of a migration.json/migration.ts manifest file. Resolving it produces a Migration.

Property	Type	Required	Description
version	number	yes	Migration version number. Must be unique within the package; migrations run in ascending order regardless of declaration order.
backup	boolean	no	When true on any migration in the package, DbMigrator.execute() takes a backup (emits backup/calls backupDatabase()) before applying migrations, and restores it (emits restore/calls restoreDatabase()) if execution fails.
tasks	(string | MigrationTask | (() => MigrationTask) | (() => Promise<MigrationTask>))[]	yes	Tasks to run for this version — a glob pattern matching *.task.sql/*.task.json files, an inline task object, or a (sync or async) function returning one.

migration.json

{
  "version": 13,
  "tasks": ["*"]
}

MigrationTask is a union of SqlScriptMigrationTask, InsertDataMigrationTask, and CustomMigrationTask. See Writing Migration Tasks.