docs/user_goals/build_details_page.md

Summary

Maintainability
Test Coverage
# Build Details Page
## Requirements
* Build duration (generally a matter of seconds to multiple minutes, worst case hours)
* Build started time
* Job trigger type
* Git SHA
* Build description
* Build status
* Build output
* Artifact list
  * Type
  * Link to download

More details for build details here: 
* [access_build_details.md](https://github.com/fastlane/ci/blob/master/docs/use_cases/access_build_details.md)
* [access_build_artifacts.md](https://github.com/fastlane/ci/blob/master/docs/use_cases/access_build_artifacts.md)