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).

# 'BranchName' and 'CommitId' variables
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The CodeCatalyst source produces and sets `BranchName` and `CommitId` variables when your workflow runs. These are known as *predefined variables*. See the following table for information about these variables.

For information about referencing these variables in a workflow, see [Using predefined variables](workflows-using-predefined-variables.md).


| Key | Value | 
| --- | --- | 
|  CommitId  |  The commit ID representing the state of the repository at the time the workflow run started. Example: `example3819261db00a3ab59468c8b` See also: [Example: Referencing the "CommitId" predefined variable](workflows-predefined-examples.md#workflows-working-with-variables-ex-refer-action)  | 
|  BranchName  |  The name of the branch against which the workflow run started. Examples: `main`, `feature/branch`, `test-LiJuan` See also: [Example: Referencing the "BranchName" predefined variable](workflows-predefined-examples.md#workflows-working-with-variables-ex-branch)  |