What is the chromatic-diagnostics.json file?
The chromatic-diagnostics.json file is a detailed report generated during a build that contains the build’s context, configuration, and results. Its primary purpose is to help diagnose and debug issues when a build doesn’t behave as expected. You can generate it by adding the --diagnostics flag to your chromatic command.
It answers many common questions you might have about a specific build. For example:
1. What commit and branch was this build for? The git and build objects list the git details.
2. Why were only some of my stories tested? actualTestCount shows how many stories were actually tested versus the total specCount in the project. The flags and options objects capture all the settings used for the run to help you understand why certain stories were ignored.
3. What versions of X dependency was my build run with? The packageJson object provides a complete list of dependencies, which is useful for checking versions of chromatic, and other key packages.