run npm install to generate a package lock

node_modules/@weborigami/origami/index.ts

@@ -0,0 +1,22 @@
+/**
+ * Tree Origami is a JavaScript project, but we use TypeScript as an internal
+ * tool to confirm our code is type safe.
+ */
+
+import { Treelike, Unpackable } from "@weborigami/async-tree";
+
+/**
+ * A class constructor is an object with a `new` method that returns an
+ * instance of the indicated type.
+ */
+export type Constructor<T> = new (...args: any[]) => T;
+
+export type Invocable = Function | Unpackable<Function|Treelike> | Treelike;
+
+export interface JsonObject {
+  [key: string]: JsonValue;
+}
+
+export type JsonValue = boolean | number | string | Date | JsonObject | JsonValue[] | null;
+
+export type TypedArray = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array | BigInt64Array | BigUint64Array;