go-githubrun is a Go library for parsing the event payload and default environment variables available to the Github workflow run instance.
import (
    "github.com/covertbyte/go-githubrun"
    "github.com/google/go-github/v32/github"
    "github.com/sethvargo/go-githubactions"
)
func main() {
    run, err := githubrun.ParseRun()
    if err != nil {
        githubactions.Fatalf("%w", err)
    }
    ctx := context.Background()
	ts := oauth2.StaticTokenSource(
		&oauth2.Token{AccessToken: run.Env.GithubToken},
	)
	tc := oauth2.NewClient(ctx, ts)
	client := github.NewClient(tc)
    pullRequest := run.Payload.(*github.PullRequestEvent).GetPullRequest()
    githubactions.DebugF("%s", pullRequest.GetBody())
    githubactions.DebugF("%s", run.Env.GithubEventName)
}For API documentation see the Go docs.