diff --git a/packages/apollo-language-server/src/graphqlTypes.ts b/packages/apollo-language-server/src/graphqlTypes.ts
index dea9dd152b..19c7fd9572 100644
--- a/packages/apollo-language-server/src/graphqlTypes.ts
+++ b/packages/apollo-language-server/src/graphqlTypes.ts
@@ -1722,6 +1722,7 @@ export interface IntrospectionDirectiveInput {
   description?: string | null;
   locations: IntrospectionDirectiveLocation[];
   args: IntrospectionInputValueInput[];
+  isRepeatable?: boolean | null;
 }
 
 /**
@@ -1765,6 +1766,7 @@ export interface IntrospectionSchemaInput {
   mutationType?: IntrospectionTypeRefInput | null;
   subscriptionType?: IntrospectionTypeRefInput | null;
   directives: IntrospectionDirectiveInput[];
+  description?: string | null;
 }
 
 /**
diff --git a/packages/apollo/src/commands/client/codegen.ts b/packages/apollo/src/commands/client/codegen.ts
index 221575fb90..bd7a4350a2 100644
--- a/packages/apollo/src/commands/client/codegen.ts
+++ b/packages/apollo/src/commands/client/codegen.ts
@@ -187,6 +187,19 @@ export default class Generate extends ClientCommand {
                 // are valid documents
                 project.validate();
 
+                // to prevent silent erroring of syntax errors, we check the project's
+                // documents to make sure there are no errors. If there are, we error here
+                // instead of project initialization
+                for (const document of this.project.documents) {
+                  if (document.syntaxErrors.length) {
+                    const errors = document.syntaxErrors.map(
+                      e =>
+                        `Syntax error in ${document.source.name}: ${e.message}\n`
+                    );
+                    throw new Error(errors.toString());
+                  }
+                }
+
                 const operations = Object.values(this.project.operations);
                 const fragments = Object.values(this.project.fragments);