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• I'd be willing to implement this feature (contributing guide)

Describe the user story
If a preworkflow hook fails, its status is currently reported to the VCS Provider.
However, the reason for the failure is not reported back to the end user, making it very hard to debug issues leading to the failure of the pre-workflow hook without having access to the atlantis logs.

Describe the solution you'd like
Atlantis should be able to post the output of the pre-workflow errors to the VCS provider (for example, Github).
This would allow developers to see the failure reason, and that there was a failure and atlantis did not just crash without ever generating a plan.

This feature can be protected by a feature flag, in case the pre-workflow hook result may contain sensitive information.

Describe the drawbacks of your solution

Describe alternatives you've considered
Only relying on pipeline status is not sufficient, as it is very quickly overlooked and potentially hidden behind hundreds of other pipeline statuses. Furthermore, the pipeline status does not provide additional information about the failure reason.