diff --git a/experiments/skinArchiveTools/lib/collectSkins.js b/experiments/skinArchiveTools/lib/collectSkins.js
index dbf29fe7..67a8cbcd 100644
--- a/experiments/skinArchiveTools/lib/collectSkins.js
+++ b/experiments/skinArchiveTools/lib/collectSkins.js
@@ -6,6 +6,7 @@ const { memoize } = require("lodash");
 const md5File = require("md5-file/promise");
 const Filehound = require("filehound");
 const Utils = require("./utils");
+const { FILE_TYPES } = require("./constants");
 
 const memoizedMd5File = memoize(md5File);
 
@@ -45,7 +46,7 @@ module.exports = async function collectSkins({
 
   fsPromises.writeFile(filenamesPath, pathList);
   collectionInfo
-    .filter(info => info.skinType === "PACK")
+    .filter(info => info.skinType === FILE_TYPES.PACK)
     .forEach(pack => {
       const packPath = path.resolve(`./assets/md5Packs/${pack.md5}`);
       if (fs.existsSync(packPath)) {
@@ -58,7 +59,7 @@ module.exports = async function collectSkins({
       }
     });
   collectionInfo
-    .filter(info => info.skinType === "INVALID")
+    .filter(info => info.skinType === FILE_TYPES.INVALID)
     .forEach(async invalid => {
       const filePath = path.resolve(`./assets/md5Invalids/${invalid.md5}.wsz`);
       if (fs.existsSync(filePath)) {
@@ -72,10 +73,14 @@ module.exports = async function collectSkins({
     moved: collectionInfo.filter(info => info.moved).length,
     newScreenshots: collectionInfo.filter(info => info.screenshotCreated)
       .length,
-    classic: collectionInfo.filter(info => info.skinType === "CLASSIC").length,
-    packs: collectionInfo.filter(info => info.skinType === "PACK").length,
-    invalid: collectionInfo.filter(info => info.skinType === "INVALID").length,
-    modern: collectionInfo.filter(info => info.skinType === "MODERN").length,
+    classic: collectionInfo.filter(info => info.skinType === FILE_TYPES.CLASSIC)
+      .length,
+    packs: collectionInfo.filter(info => info.skinType === FILE_TYPES.PACK)
+      .length,
+    invalid: collectionInfo.filter(info => info.skinType === FILE_TYPES.INVALID)
+      .length,
+    modern: collectionInfo.filter(info => info.skinType === FILE_TYPES.MODERN)
+      .length,
     // TODO: Tell modern skins from packs
     nonClassic: collectionInfo.filter(info => !info.classic).length
   };
diff --git a/experiments/skinArchiveTools/lib/constants.js b/experiments/skinArchiveTools/lib/constants.js
new file mode 100644
index 00000000..d45c2b21
--- /dev/null
+++ b/experiments/skinArchiveTools/lib/constants.js
@@ -0,0 +1,8 @@
+const FILE_TYPES = {
+  INVALID: "INVALID",
+  CLASSIC: "CLASSIC",
+  MODERN: "MODERN",
+  PACK: "PACK"
+};
+
+module.exports = { FILE_TYPES };
diff --git a/experiments/skinArchiveTools/lib/index.js b/experiments/skinArchiveTools/lib/index.js
index c67fac41..48c8eba0 100755
--- a/experiments/skinArchiveTools/lib/index.js
+++ b/experiments/skinArchiveTools/lib/index.js
@@ -23,6 +23,7 @@ const outputDir = path.resolve(rawOutputDir);
 const screenshotDir = path.resolve(rawScreenshotDir);
 const filenamesPath = path.resolve(rawFilenamesPath);
 
+// It's nice to be able to fiddle these manually
 const collect = true;
 const screenshots = true;
 
diff --git a/experiments/skinArchiveTools/lib/utils.js b/experiments/skinArchiveTools/lib/utils.js
index 2e3c604c..46ec543d 100644
--- a/experiments/skinArchiveTools/lib/utils.js
+++ b/experiments/skinArchiveTools/lib/utils.js
@@ -1,5 +1,6 @@
 const JSZip = require("jszip");
 const fsPromises = require("fs").promises;
+const { FILE_TYPES } = require("./constants");
 
 // Reduce an array down to it's unique value given an async hasher function
 async function unique(arr, hasher) {
@@ -24,11 +25,13 @@ async function skinType(skinPath) {
     const zip = await JSZip.loadAsync(buffer);
     if (zip.file(/.*\.(wsz|wal|zip)$/i).length) {
       // This is a collection of skins
-      return "PACK";
+      return FILE_TYPES.PACK;
     }
-    return zip.file(/^main\.bmp$/i).length === 1 ? "CLASSIC" : "MODERN";
+    return zip.file(/^main\.bmp$/i).length === 1
+      ? FILE_TYPES.CLASSIC
+      : FILE_TYPES.MODERN;
   } catch (e) {
-    return "INVALID";
+    return FILE_TYPES.INVALID;
   }
 }