In our projects we use multi-line format commit messages when we want to skip a build:

chore: Bump to version X.Y.Z
[skip ci]

The skip build step in the Jenkinsfile looks like this:

stage('skip:build') {
  steps {
    // Skips a build if a commit message contains "[skip ci]"
    scmSkip(deleteBuild: true, skipPattern: '^.*\\[skip ci\\]')
  }
}

However, the plugin doesn't match the regexp and doesn't stop the pipeline. It looks like the plugin doesn't check against the entire commit message because in the logs I see the following:

SCM Skip: Pattern ^.*\[skip ci\] NOT matched on message: chore: Bump to version 2.1.0

I've tried to play around with different regex expressions but without luck. if I use a single-line format for the commits everything works as expected.