patch.diff

diff --git a/app/experimenter/experiments/api/v5/types.py b/app/experimenter/experiments/api/v5/types.py
index be949b79..5a14a7bf 100644
--- a/app/experimenter/experiments/api/v5/types.py
+++ b/app/experimenter/experiments/api/v5/types.py
@@ -143,6 +143,7 @@ class NimbusExperimentType(DjangoObjectType):
     is_enrollment_paused = graphene.Boolean()
     enrollment_end_date = graphene.DateTime()
     can_review = graphene.Boolean()
+    is_editable = graphene.Boolean()
     rejection = graphene.Field(NimbusChangeLogType)
     timeout = graphene.Field(NimbusChangeLogType)
 
diff --git a/app/experimenter/experiments/models/nimbus.py b/app/experimenter/experiments/models/nimbus.py
index 805f2011..2dfeee1d 100644
--- a/app/experimenter/experiments/models/nimbus.py
+++ b/app/experimenter/experiments/models/nimbus.py
@@ -273,6 +273,12 @@ class NimbusExperiment(NimbusConstants, models.Model):
             return review_request and review_request.changed_by != reviewer
         return False

+    def is_editable(self):
+        return (
+            self.status == NimbusExperiment.Status.DRAFT
+            and self.publish_status == NimbusExperiment.PublishStatus.IDLE
+        )
+
 
 class NimbusBranch(models.Model):
     experiment = models.ForeignKey(
diff --git a/app/experimenter/nimbus-ui/schema.graphql b/app/experimenter/nimbus-ui/schema.graphql
index 4592fc64..456e10cf 100644
--- a/app/experimenter/nimbus-ui/schema.graphql
+++ b/app/experimenter/nimbus-ui/schema.graphql
@@ -238,6 +238,7 @@ type NimbusExperimentType {
   isEnrollmentPaused: Boolean
   enrollmentEndDate: DateTime
   canReview: Boolean
+  isEditable: Boolean
   rejection: NimbusChangeLogType
   timeout: NimbusChangeLogType
 }