| skip-checkout | Disable actions/checkout for head-ref and base-ref. Useful for when the checkout happens in a previous step and file are modified outside of git through other actions | no | false |
| atmos-config-path | A path to the folder where atmos.yaml is located | no | . |
| atmos-version | The version of atmos to install if install-atmos is true | no | latest |
| atmos-include-spacelift-admin-stacks | Whether to include the Spacelift admin stacks of affected stacks | no | true |
| atmos-include-dependents | Whether to include dependents of affected stacks in the output | no | false |
| atmos-include-settings | Include the settings section for each affected component | no | false |
| atmos-stack | The stack to operate on | no | "" |
| base-ref | The base ref to checkout. If not provided, the head default branch is used. | no | — |
| default-branch | The default branch to use for the base ref. | no | ${{ github.event.repository.default_branch }} |
| deploy | A flag to indicate if a deployment should be triggered. If false, a preview will be triggered. | — | false |
| github-token | A GitHub token for running the spacelift-io/setup-spacectl action | yes | — |
| head-ref | The head ref to checkout. If not provided, the head default branch is used. | no | — |
| identity | Atmos auth identity | no | "" |
| install-atmos | Whether to install atmos | no | true |
| install-jq | Whether to install jq | no | false |
| install-spacectl | Whether to install spacectl | no | true |
| jq-force | Whether to force the installation of jq | no | true |
| jq-version | The version of jq to install if install-jq is true | no | 1.7 |
| nested-matrices-count | Number of nested matrices that should be returned as the output (from 1 to 3) | no | 2 |
| skip-atmos-functions | Skip all Atmos functions such as terraform.output in `atmos describe affected` | no | false |
| skip-process-functions | Skip processing Atmos functions in `atmos describe affected` | no | false |
| skip-process-templates | Skip processing Atmos templates in `atmos describe affected` | no | false |
| spacectl-version | The version of spacectl to install if install-spacectl is true | no | latest |
| spacelift-api-key-id | The SPACELIFT_API_KEY_ID | no | — |
| spacelift-api-key-secret | The SPACELIFT_API_KEY_SECRET | no | — |
| spacelift-endpoint | The Spacelift endpoint. For example, https://unicorn.app.spacelift.io | no | — |
| filter-by-workspace-enabled | Filter out stacks where settings.spacelift.workspace_enabled is false. When enabled, only stacks with workspace_enabled not explicitly set to false will be triggered or posted in PR comments. | no | false |
| trigger-method | The method to use to trigger the Spacelift stack. Valid values are `comment` and `spacectl` | no | comment |