Amazon CodeCatalyst is no longer open to new customers. Existing customers can continue to use the service as normal. For more information, see [How to migrate from CodeCatalyst](migration.md).

# Testing lifecycle management for bundle outputs and merge conflicts
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You can locally test your blueprint’s lifecycle management and merge conflict resolution. A series of bundles under the `synth/` directory that represent the various phases of a lifecycle update is generated. To test the lifecycle management, you can run the following yarn command on your blueprint:`yarn blueprint: resynth`. To learn more about resynthesis and bundles, see [Resynthesis](custom-bp-concepts.md#resynthesis-concept) and [Generating files with resynthesis](merge-strategies-lm.md#three-way-merge-lm).