This GitHub Action sets a pull request status to pending if the title includes "WIP".
An example workflow looks like this (switch to the <> Edit new file tab when creating a new action and paste the code below):
workflow "Set status on pull_request" {
on = "pull_request"
resolves = ["Set status"]
}
action "Set status" {
uses = "wip/action@master"
secrets = ["GITHUB_TOKEN"]
}