diff --git a/cmd/adhoc.go b/cmd/adhoc.go
index 26645d401..4a90d8499 100644
--- a/cmd/adhoc.go
+++ b/cmd/adhoc.go
@@ -72,6 +72,11 @@ func (a *Adhoc) NewServer(userConfig legacy.UserConfig, config legacy.Config) (S
 			TerraformRoot: terraform.Root{},
 			GithubRepo:    github.Repo{},
 		},
+		GithubHostname:   userConfig.GithubHostname,
+		GithubAppID:      userConfig.GithubAppID,
+		GithubAppKeyFile: userConfig.GithubAppKeyFile,
+		GithubAppSlug:    userConfig.GithubAppSlug,
+		GlobalCfg:        globalCfg,
 	}
 	return adhoc.NewServer(cfg)
 }
diff --git a/server/neptune/adhoc/config/config.go b/server/neptune/adhoc/config/config.go
index 11f7cc5fd..c017e37ec 100644
--- a/server/neptune/adhoc/config/config.go
+++ b/server/neptune/adhoc/config/config.go
@@ -24,4 +24,11 @@ type Config struct {
 	CtxLogger            logging.Logger
 	App                  githubapp.Config
 	AdhocExecutionParams adhoc.AdhocTerraformWorkflowExecutionParams
+
+	GithubAppID      int64
+	GithubAppKeyFile string
+	GithubAppSlug    string
+	GithubHostname   string
+
+	GlobalCfg valid.GlobalCfg
 }
diff --git a/server/neptune/adhoc/server.go b/server/neptune/adhoc/server.go
index 405311946..d2c229cb8 100644
--- a/server/neptune/adhoc/server.go
+++ b/server/neptune/adhoc/server.go
@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/palantir/go-githubapp/githubapp"
+	"github.com/runatlantis/atlantis/server/legacy/events/vcs"
 	"github.com/runatlantis/atlantis/server/neptune/lyft/feature"
 	"github.com/runatlantis/atlantis/server/neptune/sync/crons"
 	ghClient "github.com/runatlantis/atlantis/server/neptune/workflows/activities/github"
@@ -26,6 +27,9 @@ import (
 	"github.com/runatlantis/atlantis/server/metrics"
 	adhoc "github.com/runatlantis/atlantis/server/neptune/adhoc/adhocexecutionhelpers"
 	adhocconfig "github.com/runatlantis/atlantis/server/neptune/adhoc/config"
+	root_config "github.com/runatlantis/atlantis/server/neptune/gateway/config"
+	"github.com/runatlantis/atlantis/server/neptune/gateway/deploy"
+	"github.com/runatlantis/atlantis/server/neptune/gateway/event/preworkflow"
 	neptune_http "github.com/runatlantis/atlantis/server/neptune/http"
 	internalSync "github.com/runatlantis/atlantis/server/neptune/sync"
 	"github.com/runatlantis/atlantis/server/neptune/temporal"
@@ -52,6 +56,7 @@ type Server struct {
 	GithubActivities     *activities.Github
 	AdhocExecutionParams adhoc.AdhocTerraformWorkflowExecutionParams
 	TerraformTaskQueue   string
+	RootConfigBuilder    *root_config.Builder
 }
 
 func NewServer(config *adhocconfig.Config) (*Server, error) {
@@ -152,6 +157,45 @@ func NewServer(config *adhocconfig.Config) (*Server, error) {
 
 	cronScheduler := internalSync.NewCronScheduler(config.CtxLogger)
 
+	privateKey, err := os.ReadFile(config.GithubAppKeyFile)
+	if err != nil {
+		return nil, err
+	}
+	githubCredentials := &vcs.GithubAppCredentials{
+		AppID:    config.GithubAppID,
+		Key:      privateKey,
+		Hostname: config.GithubHostname,
+		AppSlug:  config.GithubAppSlug,
+	}
+
+	repoFetcher := &github.RepoFetcher{
+		DataDir:           config.DataDir,
+		GithubCredentials: githubCredentials,
+		GithubHostname:    config.GithubHostname,
+		Logger:            config.CtxLogger,
+		Scope:             scope.SubScope("repo.fetch"),
+	}
+
+	hooksRunner := &preworkflow.HooksRunner{
+		GlobalCfg: config.GlobalCfg,
+		HookExecutor: &preworkflow.HookExecutor{
+			Logger: config.CtxLogger,
+		},
+	}
+
+	rootConfigBuilder := &root_config.Builder{
+		RepoFetcher:     repoFetcher,
+		HooksRunner:     hooksRunner,
+		ParserValidator: &root_config.ParserValidator{GlobalCfg: config.GlobalCfg},
+		Strategy: &root_config.ModifiedRootsStrategy{
+			RootFinder:  &deploy.RepoRootFinder{Logger: config.CtxLogger},
+			FileFetcher: &github.RemoteFileFetcher{ClientCreator: clientCreator},
+		},
+		GlobalCfg: config.GlobalCfg,
+		Logger:    config.CtxLogger,
+		Scope:     scope.SubScope("event.filters.root"),
+	}
+
 	server := Server{
 		Logger:        config.CtxLogger,
 		CronScheduler: cronScheduler,
@@ -170,6 +214,7 @@ func NewServer(config *adhocconfig.Config) (*Server, error) {
 		TerraformTaskQueue:   config.TemporalCfg.TerraformTaskQueue,
 		GithubActivities:     githubActivities,
 		AdhocExecutionParams: config.AdhocExecutionParams,
+		RootConfigBuilder:    rootConfigBuilder,
 	}
 	return &server, nil
 }