diff --git a/workspaces/adventure-pack/webpack.config.ts b/workspaces/adventure-pack/webpack.config.ts
index f83bedf1..328dc771 100644
--- a/workspaces/adventure-pack/webpack.config.ts
+++ b/workspaces/adventure-pack/webpack.config.ts
@@ -51,7 +51,14 @@ const config: Configuration = {
     new WriteGoodiesJsonWebpackPlugin(),
     new WriteIndexHtmlWebpackPlugin(commitHash),
 
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
   ],
 
   optimization: {
diff --git a/workspaces/download-leetcode-submissions/webpack.config.ts b/workspaces/download-leetcode-submissions/webpack.config.ts
index 9358182e..97a02fc6 100644
--- a/workspaces/download-leetcode-submissions/webpack.config.ts
+++ b/workspaces/download-leetcode-submissions/webpack.config.ts
@@ -64,7 +64,14 @@ const config: Configuration = {
 
     new WebpackMakeOutputExecutablePlugin(),
 
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
   ],
 };
 
diff --git a/workspaces/fetch-leetcode-problem-list/webpack.config.ts b/workspaces/fetch-leetcode-problem-list/webpack.config.ts
index 9358182e..97a02fc6 100644
--- a/workspaces/fetch-leetcode-problem-list/webpack.config.ts
+++ b/workspaces/fetch-leetcode-problem-list/webpack.config.ts
@@ -64,7 +64,14 @@ const config: Configuration = {
 
     new WebpackMakeOutputExecutablePlugin(),
 
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
   ],
 };
 
diff --git a/workspaces/fetch-recent-accepted-leetcode-submissions/webpack.config.ts b/workspaces/fetch-recent-accepted-leetcode-submissions/webpack.config.ts
index 9358182e..97a02fc6 100644
--- a/workspaces/fetch-recent-accepted-leetcode-submissions/webpack.config.ts
+++ b/workspaces/fetch-recent-accepted-leetcode-submissions/webpack.config.ts
@@ -64,7 +64,14 @@ const config: Configuration = {
 
     new WebpackMakeOutputExecutablePlugin(),
 
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
   ],
 };
 
diff --git a/workspaces/leetcode-prettier-extension/webpack.config.ts b/workspaces/leetcode-prettier-extension/webpack.config.ts
index c852f769..e09d0177 100644
--- a/workspaces/leetcode-prettier-extension/webpack.config.ts
+++ b/workspaces/leetcode-prettier-extension/webpack.config.ts
@@ -38,7 +38,14 @@ const config: Configuration = {
   },
 
   plugins: [
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
 
     new WebpackChromeExtensionManifestPlugin({
       name: "LeetCode Prettier Formatting",
diff --git a/workspaces/leetcode-zen-mode/webpack.config.ts b/workspaces/leetcode-zen-mode/webpack.config.ts
index a399bf24..615971e1 100644
--- a/workspaces/leetcode-zen-mode/webpack.config.ts
+++ b/workspaces/leetcode-zen-mode/webpack.config.ts
@@ -70,7 +70,14 @@ const config: Configuration = {
   },
 
   plugins: [
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
 
     new WriteOptionsHtmlWebpackPlugin({
       htmlFilename: OPTIONS_HTML_FILENAME,
diff --git a/workspaces/post-leetcode-potd-to-discord/webpack.config.ts b/workspaces/post-leetcode-potd-to-discord/webpack.config.ts
index 457f38f1..5a984ff2 100644
--- a/workspaces/post-leetcode-potd-to-discord/webpack.config.ts
+++ b/workspaces/post-leetcode-potd-to-discord/webpack.config.ts
@@ -70,7 +70,14 @@ const config: Configuration = {
 
     new WebpackMakeOutputExecutablePlugin(),
 
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
   ],
 };
 
diff --git a/workspaces/simon-game/webpack.config.ts b/workspaces/simon-game/webpack.config.ts
index 21ebaecf..2f29756b 100644
--- a/workspaces/simon-game/webpack.config.ts
+++ b/workspaces/simon-game/webpack.config.ts
@@ -35,7 +35,14 @@ const config: Configuration = {
   },
 
   plugins: [
-    new ForkTsCheckerWebpackPlugin(),
+    // allowUnreachableCode necessary for tsgo (exhaustive switch handling differs from tsc)
+    new ForkTsCheckerWebpackPlugin({
+      typescript: {
+        configOverwrite: {
+          compilerOptions: { allowUnreachableCode: true },
+        },
+      },
+    }),
 
     new WriteIndexHtmlWebpackPlugin(),
   ],