diff --git a/jsdoc.json b/jsdoc.json
index 7024999c9..0026a24c9 100644
--- a/jsdoc.json
+++ b/jsdoc.json
@@ -1,7 +1,7 @@
 {
   "source" : {
     "include": [
-      "packages/utils/array-utils/src",
+      "packages/array-utils/src",
 
       "packages/modeling/src/colors",
       "packages/modeling/src/curves",
diff --git a/package.json b/package.json
index 541c2c6d0..79b807f34 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "",
   "homepage": "https://openjscad.xyz/",
   "repository": "https://github.com/jscad/OpenJSCAD.org",
+  "type": "module",
   "scripts": {
     "docs": "jsdoc --configure jsdoc.json",
     "coverage": "lerna run --concurrency 1 --stream coverage",
diff --git a/packages/utils/array-utils/CHANGELOG.md b/packages/array-utils/CHANGELOG.md
similarity index 100%
rename from packages/utils/array-utils/CHANGELOG.md
rename to packages/array-utils/CHANGELOG.md
diff --git a/packages/utils/array-utils/README.md b/packages/array-utils/README.md
similarity index 100%
rename from packages/utils/array-utils/README.md
rename to packages/array-utils/README.md
diff --git a/packages/utils/array-utils/dist/jscad-array-utils.es.js b/packages/array-utils/dist/jscad-array-utils.es.js
similarity index 100%
rename from packages/utils/array-utils/dist/jscad-array-utils.es.js
rename to packages/array-utils/dist/jscad-array-utils.es.js
diff --git a/packages/utils/array-utils/dist/jscad-array-utils.min.js b/packages/array-utils/dist/jscad-array-utils.min.js
similarity index 100%
rename from packages/utils/array-utils/dist/jscad-array-utils.min.js
rename to packages/array-utils/dist/jscad-array-utils.min.js
diff --git a/packages/utils/array-utils/package.json b/packages/array-utils/package.json
similarity index 100%
rename from packages/utils/array-utils/package.json
rename to packages/array-utils/package.json
diff --git a/packages/utils/array-utils/rollup.config.js b/packages/array-utils/rollup.config.js
similarity index 100%
rename from packages/utils/array-utils/rollup.config.js
rename to packages/array-utils/rollup.config.js
diff --git a/packages/array-utils/src/coalesce.d.ts b/packages/array-utils/src/coalesce.d.ts
new file mode 100644
index 000000000..aa4dcc6e7
--- /dev/null
+++ b/packages/array-utils/src/coalesce.d.ts
@@ -0,0 +1,3 @@
+import type { RecursiveArray } from './recursiveArray.d.ts'
+
+export function coalesce<T>(arr: RecursiveArray<T>): Array<T>
diff --git a/packages/array-utils/src/coalesce.js b/packages/array-utils/src/coalesce.js
new file mode 100644
index 000000000..52145d4cf
--- /dev/null
+++ b/packages/array-utils/src/coalesce.js
@@ -0,0 +1,24 @@
+/**
+ * Flattens and filters out nullish values from the given list of arguments.
+ *
+ * The arguments can be composed of multiple depths of objects and arrays.
+ * The output is a single flat array with no missing values.
+ *
+ * @param {Array} arr - list of arguments
+ * @returns {Array} a flat list of arguments
+ *
+ * @alias module:modeling/utils.coalesce
+ * @function
+ */
+export const coalesce = (arr) => flattenHelper(arr, [])
+
+// Helper to recursively append to a given list.
+// This is MUCH faster than other flatten methods.
+const flattenHelper = (arr, out) => {
+  if (Array.isArray(arr)) {
+    arr.forEach((child) => flattenHelper(child, out))
+  } else if (arr != null && arr !== undefined) {
+    out.push(arr)
+  }
+  return out
+}
diff --git a/packages/array-utils/src/coalesce.test.js b/packages/array-utils/src/coalesce.test.js
new file mode 100644
index 000000000..7f2e644a3
--- /dev/null
+++ b/packages/array-utils/src/coalesce.test.js
@@ -0,0 +1,35 @@
+import test from 'ava'
+
+import { coalesce } from './index.js'
+
+test('array-utils: coalesce() should coalesce arrays into an array', (t) => {
+  let obs = coalesce([1, 2, 3, 4])
+  let exp = [1, 2, 3, 4]
+  t.deepEqual(obs, exp)
+
+  obs = coalesce([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
+  exp = [1, 2, 3, 4, 5, 6, 7, 8, 9]
+  t.deepEqual(obs, exp)
+})
+
+test('array-utils: coalesce() should coalesce arrays with arrays and values into an array', (t) => {
+  let obs = coalesce([[1], 2, 3, [4]])
+  let exp = [1, 2, 3, 4]
+  t.deepEqual(obs, exp)
+
+  obs = coalesce([1, [2, 3], 4])
+  exp = [1, 2, 3, 4]
+  t.deepEqual(obs, exp)
+})
+
+test('array-utils: coalesce() should coalesce heiarchy of arrays and values into an array', (t) => {
+  const obs = coalesce([[1], [2, 3, [4, 5]], 6])
+  const exp = [1, 2, 3, 4, 5, 6]
+  t.deepEqual(obs, exp)
+})
+
+test('array-utils: coalesce() should coalesce arrays with nullish values into an array', (t) => {
+  const obs = coalesce([[1], [2, null, [4, undefined]], undefined])
+  const exp = [1, 2, 4]
+  t.deepEqual(obs, exp)
+})
diff --git a/packages/utils/array-utils/src/flatten.d.ts b/packages/array-utils/src/flatten.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/flatten.d.ts
rename to packages/array-utils/src/flatten.d.ts
diff --git a/packages/utils/array-utils/src/flatten.js b/packages/array-utils/src/flatten.js
similarity index 95%
rename from packages/utils/array-utils/src/flatten.js
rename to packages/array-utils/src/flatten.js
index fd1640927..e8ad277b5 100644
--- a/packages/utils/array-utils/src/flatten.js
+++ b/packages/array-utils/src/flatten.js
@@ -1,9 +1,14 @@
 /**
  * Flatten the given array into a single array of elements.
+ *
  * The given array can be composed of multiple depths of objects and or arrays.
+ *
  * @param {Array} array - array to flatten
  * @returns {Array} a flat array with a single list of elements
+ *
  * @alias module:array-utils.flatten
+ * @function
+ *
  * @example
  * const flat = flatten([[1], [2, 3, [4, 5]], 6]) // returns [1, 2, 3, 4, 5, 6]
  */
diff --git a/packages/utils/array-utils/src/flatten.test.js b/packages/array-utils/src/flatten.test.js
similarity index 100%
rename from packages/utils/array-utils/src/flatten.test.js
rename to packages/array-utils/src/flatten.test.js
diff --git a/packages/utils/array-utils/src/fnNumberSort.d.ts b/packages/array-utils/src/fnNumberSort.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/fnNumberSort.d.ts
rename to packages/array-utils/src/fnNumberSort.d.ts
diff --git a/packages/utils/array-utils/src/fnNumberSort.js b/packages/array-utils/src/fnNumberSort.js
similarity index 94%
rename from packages/utils/array-utils/src/fnNumberSort.js
rename to packages/array-utils/src/fnNumberSort.js
index a97a31238..e7d7b0a9c 100644
--- a/packages/utils/array-utils/src/fnNumberSort.js
+++ b/packages/array-utils/src/fnNumberSort.js
@@ -1,9 +1,13 @@
 /**
  * Compare function for sorting arrays of numbers.
+ *
  * @param {number} a - first number
  * @param {number} b - second number
  * @return {number} result of a - b
+ *
  * @alias module:array-utils.fnNumberSort
+ * @function
+ *
  * @example
  * const numbers = [2, 1, 4, 3, 6, 5, 8, 7, 9, 0]
  * const sorted = numbers.sort(fnNumberSort)
diff --git a/packages/utils/array-utils/src/fnNumberSort.test.js b/packages/array-utils/src/fnNumberSort.test.js
similarity index 100%
rename from packages/utils/array-utils/src/fnNumberSort.test.js
rename to packages/array-utils/src/fnNumberSort.test.js
diff --git a/packages/utils/array-utils/src/head.d.ts b/packages/array-utils/src/head.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/head.d.ts
rename to packages/array-utils/src/head.d.ts
diff --git a/packages/utils/array-utils/src/head.js b/packages/array-utils/src/head.js
similarity index 94%
rename from packages/utils/array-utils/src/head.js
rename to packages/array-utils/src/head.js
index 4bdff6e3a..21ba9d665 100644
--- a/packages/utils/array-utils/src/head.js
+++ b/packages/array-utils/src/head.js
@@ -1,8 +1,12 @@
 /**
  * Return the first element of the given array.
+ *
  * @param {*} array - anything
  * @returns {*} first element of the array, or undefined
+ *
  * @alias module:array-utils.head
+ * @function
+ *
  * @example
  * let element = head([1, 2])
  */
diff --git a/packages/utils/array-utils/src/head.test.js b/packages/array-utils/src/head.test.js
similarity index 100%
rename from packages/utils/array-utils/src/head.test.js
rename to packages/array-utils/src/head.test.js
diff --git a/packages/utils/array-utils/src/index.d.ts b/packages/array-utils/src/index.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/index.d.ts
rename to packages/array-utils/src/index.d.ts
diff --git a/packages/utils/array-utils/src/index.js b/packages/array-utils/src/index.js
similarity index 78%
rename from packages/utils/array-utils/src/index.js
rename to packages/array-utils/src/index.js
index 2c0a3156e..6917d8986 100644
--- a/packages/utils/array-utils/src/index.js
+++ b/packages/array-utils/src/index.js
@@ -1,10 +1,13 @@
 /**
  * JSCAD Utility functions for arrays.
+ *
  * @module array-utils
+ *
  * @example
- * const { flatten, head } = require('@jscad/array-utils')
+ * import { flatten, head } from '@jscad/array-utils'
  */
 
+export { coalesce } from './coalesce.js'
 export { flatten } from './flatten.js'
 export { fnNumberSort } from './fnNumberSort.js'
 export { head } from './head.js'
diff --git a/packages/utils/array-utils/src/index.test-d.ts b/packages/array-utils/src/index.test-d.ts
similarity index 100%
rename from packages/utils/array-utils/src/index.test-d.ts
rename to packages/array-utils/src/index.test-d.ts
diff --git a/packages/utils/array-utils/src/insertSorted.d.ts b/packages/array-utils/src/insertSorted.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/insertSorted.d.ts
rename to packages/array-utils/src/insertSorted.d.ts
diff --git a/packages/utils/array-utils/src/insertSorted.js b/packages/array-utils/src/insertSorted.js
similarity index 97%
rename from packages/utils/array-utils/src/insertSorted.js
rename to packages/array-utils/src/insertSorted.js
index 09388b175..b20444de3 100644
--- a/packages/utils/array-utils/src/insertSorted.js
+++ b/packages/array-utils/src/insertSorted.js
@@ -1,9 +1,13 @@
 /**
  * Insert the given element into the give array using the compareFunction.
+ *
  * @param {Array} array - array in which to insert
  * @param {*} element - element to insert into the array
  * @param {Function} compareFunction - a function that defines the sort order of elements
+ *
  * @alias module:array-utils.insertSorted
+ * @function
+ *
  * @example
  * const numbers = [1, 5]
  * const result = insertSorted(numbers, 3, fnNumberSort)
diff --git a/packages/utils/array-utils/src/insertSorted.test.js b/packages/array-utils/src/insertSorted.test.js
similarity index 100%
rename from packages/utils/array-utils/src/insertSorted.test.js
rename to packages/array-utils/src/insertSorted.test.js
diff --git a/packages/utils/array-utils/src/nth.d.ts b/packages/array-utils/src/nth.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/nth.d.ts
rename to packages/array-utils/src/nth.d.ts
diff --git a/packages/utils/array-utils/src/nth.js b/packages/array-utils/src/nth.js
similarity index 95%
rename from packages/utils/array-utils/src/nth.js
rename to packages/array-utils/src/nth.js
index 1cdd32c69..b108b82cb 100644
--- a/packages/utils/array-utils/src/nth.js
+++ b/packages/array-utils/src/nth.js
@@ -1,9 +1,13 @@
 /**
  * Return the Nth element of the given array.
+ *
  * @param {*} array - anything
  * @param {number} index - index of the element to return
  * @returns {*} Nth element of the array, or undefined
+ *
  * @alias module:array-utils.nth
+ * @function
+ *
  * @example
  * let value = nth([1], 2) // undefined
  * let value = nth([1, 2, 3, 4, 5], 3) // 4
diff --git a/packages/utils/array-utils/src/nth.test.js b/packages/array-utils/src/nth.test.js
similarity index 100%
rename from packages/utils/array-utils/src/nth.test.js
rename to packages/array-utils/src/nth.test.js
diff --git a/packages/utils/array-utils/src/padToLength.d.ts b/packages/array-utils/src/padToLength.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/padToLength.d.ts
rename to packages/array-utils/src/padToLength.d.ts
diff --git a/packages/utils/array-utils/src/padToLength.js b/packages/array-utils/src/padToLength.js
similarity index 96%
rename from packages/utils/array-utils/src/padToLength.js
rename to packages/array-utils/src/padToLength.js
index 33744f658..65d6bebf5 100644
--- a/packages/utils/array-utils/src/padToLength.js
+++ b/packages/array-utils/src/padToLength.js
@@ -1,11 +1,16 @@
 /**
  * Build an array of the given target length from an existing array and a padding value.
+ *
  * If the array is already larger than the target length, it will not be shortened.
+ *
  * @param {Array} anArray - the source array to copy into the result.
  * @param {*} padding - the value to add to the new array to reach the desired length.
  * @param {number} targetLength - The desired length of the returned array.
  * @returns {Array} an array with at least 'target length" elements
+ *
  * @alias module:array-utils.padToLength
+ * @function
+ *
  * @example
  * const srcArray = [2, 3, 4]
  * const paddedArray = padToLength(srcArray, 0, 5)
diff --git a/packages/utils/array-utils/src/padToLength.test.js b/packages/array-utils/src/padToLength.test.js
similarity index 100%
rename from packages/utils/array-utils/src/padToLength.test.js
rename to packages/array-utils/src/padToLength.test.js
diff --git a/packages/utils/array-utils/src/recursiveArray.d.ts b/packages/array-utils/src/recursiveArray.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/recursiveArray.d.ts
rename to packages/array-utils/src/recursiveArray.d.ts
diff --git a/packages/utils/array-utils/src/toArray.d.ts b/packages/array-utils/src/toArray.d.ts
similarity index 100%
rename from packages/utils/array-utils/src/toArray.d.ts
rename to packages/array-utils/src/toArray.d.ts
diff --git a/packages/utils/array-utils/src/toArray.js b/packages/array-utils/src/toArray.js
similarity index 94%
rename from packages/utils/array-utils/src/toArray.js
rename to packages/array-utils/src/toArray.js
index 2290ef5ba..63fc5a547 100644
--- a/packages/utils/array-utils/src/toArray.js
+++ b/packages/array-utils/src/toArray.js
@@ -1,8 +1,12 @@
 /**
  * Convert the given array to an array if not already an array.
+ *
  * @param {*} array - anything
  * @returns {Array} an array
+ *
  * @alias module:array-utils.toArray
+ * @function
+ *
  * @example
  * const array = toArray(1) // [1]
  */
diff --git a/packages/utils/array-utils/src/toArray.test.js b/packages/array-utils/src/toArray.test.js
similarity index 100%
rename from packages/utils/array-utils/src/toArray.test.js
rename to packages/array-utils/src/toArray.test.js
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bac776f8e..6fc3ac10c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -30,6 +30,20 @@ importers:
       standardx: 7.0.0
       tsd: 0.28.1
 
+  packages/array-utils:
+    specifiers:
+      '@rollup/plugin-terser': ^0.4.3
+      ava: ^4.3.3
+      c8: ^8.0.0
+      rollup: ^2.79.1
+      rollup-plugin-banner: ^0.2.1
+    devDependencies:
+      '@rollup/plugin-terser': 0.4.3_rollup@2.79.1
+      ava: 4.3.3
+      c8: 8.0.1
+      rollup: 2.79.1
+      rollup-plugin-banner: 0.2.1
+
   packages/cli:
     specifiers:
       '@jscad/array-utils': workspace:3.0.1-alpha.0
@@ -41,7 +55,7 @@ importers:
       c8: ^8.0.0
       jszip: ^3.10.1
     dependencies:
-      '@jscad/array-utils': link:../utils/array-utils
+      '@jscad/array-utils': link:../array-utils
       '@jscad/core': link:../core
       '@jscad/io': link:../io/io
       '@jscad/io-utils': link:../io/io-utils
@@ -62,7 +76,7 @@ importers:
       json5: 2.2.3
       strip-bom: 4.0.0
     dependencies:
-      '@jscad/array-utils': link:../utils/array-utils
+      '@jscad/array-utils': link:../array-utils
       '@jscad/io': link:../io/io
       '@jscad/io-utils': link:../io/io-utils
       '@jscad/modeling': link:../modeling
@@ -87,7 +101,7 @@ importers:
       rollup-plugin-version-injector: ^1.3.3
       saxes: ^6.0.0
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/modeling': link:../../modeling
       fflate: 0.7.3
       saxes: 6.0.0
@@ -116,7 +130,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/io-utils': link:../io-utils
       '@jscad/modeling': link:../../modeling
       fflate: 0.7.3
@@ -164,7 +178,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/modeling': link:../../modeling
     devDependencies:
       '@rollup/plugin-node-resolve': 15.2.1_rollup@2.79.1
@@ -198,7 +212,7 @@ importers:
     dependencies:
       '@jscad/3mf-deserializer': link:../3mf-deserializer
       '@jscad/3mf-serializer': link:../3mf-serializer
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/dxf-deserializer': link:../dxf-deserializer
       '@jscad/dxf-serializer': link:../dxf-serializer
       '@jscad/io-utils': link:../io-utils
@@ -240,7 +254,7 @@ importers:
       rollup-plugin-banner: ^0.2.1
       rollup-plugin-version-injector: ^1.3.3
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/io-utils': link:../io-utils
     devDependencies:
       '@jscad/modeling': link:../../modeling
@@ -263,7 +277,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/modeling': link:../../modeling
     devDependencies:
       '@rollup/plugin-node-resolve': 15.2.1_rollup@2.79.1
@@ -307,7 +321,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/modeling': link:../../modeling
     devDependencies:
       '@rollup/plugin-node-resolve': 15.0.1_rollup@2.79.1
@@ -351,7 +365,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/modeling': link:../../modeling
     devDependencies:
       '@rollup/plugin-node-resolve': 15.0.1_rollup@2.79.1
@@ -376,7 +390,7 @@ importers:
       rollup-plugin-version-injector: ^1.3.3
       saxes: 6.0.0
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/io-utils': link:../io-utils
       '@jscad/modeling': link:../../modeling
       saxes: 6.0.0
@@ -428,7 +442,7 @@ importers:
       rollup-plugin-version-injector: ^1.3.3
       saxes: ^6.0.0
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/io-utils': link:../io-utils
       '@jscad/modeling': link:../../modeling
       saxes: 6.0.0
@@ -455,7 +469,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../../utils/array-utils
+      '@jscad/array-utils': link:../../array-utils
       '@jscad/io-utils': link:../io-utils
       '@jscad/modeling': link:../../modeling
       onml: 1.3.0
@@ -481,20 +495,6 @@ importers:
       rollup: 2.79.1
       rollup-plugin-banner: 0.2.1
 
-  packages/utils/array-utils:
-    specifiers:
-      '@rollup/plugin-terser': ^0.4.3
-      ava: ^4.3.3
-      c8: ^8.0.0
-      rollup: ^2.79.1
-      rollup-plugin-banner: ^0.2.1
-    devDependencies:
-      '@rollup/plugin-terser': 0.4.3_rollup@2.79.1
-      ava: 4.3.3
-      c8: 8.0.0
-      rollup: 2.79.1
-      rollup-plugin-banner: 0.2.1
-
   packages/utils/img:
     specifiers:
       pngjs: ^6.0.0
@@ -519,7 +519,7 @@ importers:
       rollup: ^2.79.1
       rollup-plugin-banner: ^0.2.1
     dependencies:
-      '@jscad/array-utils': link:../array-utils
+      '@jscad/array-utils': link:../../array-utils
       camera-unproject: 1.0.1
       gl-mat4: 1.2.0
       gl-vec3: 1.1.3
@@ -7404,7 +7404,7 @@ packages:
     dev: true
 
   github.com/jscad/sample-files/f6f6485e7286a50c4c304d697be9cc9f7e64beb6:
-    resolution: {tarball: https://codeload.github.com/jscad/sample-files/tar.gz/f6f6485e7286a50c4c304d697be9cc9f7e64beb6}
+    resolution: {commit: f6f6485e7286a50c4c304d697be9cc9f7e64beb6, repo: git+ssh://git@github.com/jscad/sample-files.git, type: git}
     name: '@jscad/sample-files'
     version: 0.0.0
     dev: true
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 6b491fc94..271bebdc4 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,5 +1,6 @@
 prefer-workspace-packages: true
 packages:
+  - "packages/array-utils"
   - "packages/cli"
   - "packages/core"
   - "packages/io/io"
@@ -19,6 +20,5 @@ packages:
   - "packages/io/x3d-deserializer"
   - "packages/io/x3d-serializer"
   - "packages/modeling"
-  - "packages/utils/array-utils"
   - "packages/utils/img"
   - "packages/utils/regl-renderer"