convex-migration-helper

Plan and execute Convex schema migrations safely with multi-deploy workflows and data transformation. Safely migrate Convex schemas and data when making breaking changes. Convex will not let you deploy a schema that does not match the data at rest. This is the fundamental constraint that shapes every migration: This means migrations follow a predictable pattern: widen the schema, migrate the data, narrow the schema . Convex migrations run online, meaning the app continues serving requests while data is updated asynchronously in batches. During the migration window, your code must handle both old and new data formats. When changing the shape of data, create a new field rather than modifying an existing one. This makes the transition safer and easier to roll back.