feat: Default literal

src/client/types/typing.js

@@ -129,10 +129,19 @@ const defaultInvocation = (context, steps) => {
   const {args = []} = funcDescription;
   return {
     type: 'invoke',
-    args: args.map(() => ({
-      type: 'literal',
-      value: '',
-    })),
+    args: args.map(([, {type}]) => {
+      const {defaultLiteral} = Context.typeDescription(type, undefined);
+      if (defaultLiteral) {
+        return ({
+          type: 'literal',
+          value: defaultLiteral,
+        });
+      }
+      return ({
+        type: 'literal',
+        value: {work: {in: 'progress'}},
+      });
+    }),
   };
 };