diff --git a/package.json b/package.json
index acaeb9c..95f4a9d 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   ],
   "scripts": {
     "test": "node --test --import ./tests/register-stubs.mjs tests/*.test.js",
-    "build": "npm run build:iife && npm run build:esm",
+    "build": "rm -rf dist && npm run build:iife && npm run build:esm",
     "build:iife": "esbuild src/index.js --bundle --format=iife --global-name=LearnosityWProofreader '--footer:js=LearnosityWProofreader=LearnosityWProofreader.LearnosityWProofreader;' --minify --outfile=dist/wproofreader-learnosity.min.js",
     "build:esm": "esbuild src/index.js --bundle --format=esm --minify --outfile=dist/wproofreader-learnosity.esm.js",
     "prepack": "npm run build"
diff --git a/src/config.js b/src/config.js
index d7e1e4d..247e79e 100644
--- a/src/config.js
+++ b/src/config.js
@@ -17,9 +17,7 @@ export const SURFACE_GLOBALS = {
 // explicitly with `surfaces: ['questions', 'items', 'author']`.
 export const DEFAULT_SURFACES = ['author'];
 
-// Fixed partner tag so WebSpellChecker can attribute traffic to this plugin
-// (cf. the CKEditor 5 plugin's `proofreader_ck5`). Not caller-configurable.
-export const APP_TYPE = 'wpr_learnosity';
+export const APP_TYPE = 'learnosity_extension';
 
 /*
  * Split options into the WProofreader block (forwarded to the SDK's init()
diff --git a/tests/config.test.js b/tests/config.test.js
index dbad23f..93a0963 100644
--- a/tests/config.test.js
+++ b/tests/config.test.js
@@ -20,7 +20,7 @@ test('serviceId path: Cloud config with grammar/autocorrect/appType defaults', (
   assert.equal(config.wproofreader.serviceId, 'svc-123');
   assert.equal(config.wproofreader.enableGrammar, true);
   assert.equal(config.wproofreader.autocorrect, true);
-  assert.equal(config.wproofreader.appType, 'wpr_learnosity');
+  assert.equal(config.wproofreader.appType, 'learnosity_extension');
 });
 
 test('self-hosted service options pass through unchanged', () => {
@@ -50,12 +50,12 @@ test('enableGrammar and autocorrect can be turned off explicitly', () => {
 test('appType is set to the fixed partner tag', () => {
   const config = buildConfig({ wproofreader: { serviceId: 'svc' } });
   assert.equal(config.wproofreader.appType, APP_TYPE);
-  assert.equal(APP_TYPE, 'wpr_learnosity');
+  assert.equal(APP_TYPE, 'learnosity_extension');
 });
 
 test('appType is not caller-configurable: a supplied value is ignored', () => {
   const config = buildConfig({ wproofreader: { serviceId: 'svc', appType: 'custom_partner' } });
-  assert.equal(config.wproofreader.appType, 'wpr_learnosity');
+  assert.equal(config.wproofreader.appType, 'learnosity_extension');
 });
 
 test('explicit wproofreader.lang overrides defaultLang', (t) => {
diff --git a/tests/connector.test.js b/tests/connector.test.js
index 0384d5c..0c035f0 100644
--- a/tests/connector.test.js
+++ b/tests/connector.test.js
@@ -95,7 +95,7 @@ test('attaches via the SDK with the built wproofreader options incl. appType', a
   assert.equal(globalThis.__sdkInitCalls.length, 1);
   const { options } = globalThis.__sdkInitCalls[0];
   assert.equal(options.serviceId, 'svc-123');
-  assert.equal(options.appType, 'wpr_learnosity');
+  assert.equal(options.appType, 'learnosity_extension');
   assert.equal(options.enableGrammar, true);
   assert.equal(options.container, container);
 });