diff --git a/.changeset/wide-configs-extend.md b/.changeset/wide-configs-extend.md
new file mode 100644
index 0000000..1fb2f4d
--- /dev/null
+++ b/.changeset/wide-configs-extend.md
@@ -0,0 +1,5 @@
+---
+"@plexus-ms/config": minor
+---
+
+Add the `tsconfig-next` subpath export: the shared TypeScript compiler options for Next.js apps — `"extends": "@plexus-ms/config/tsconfig-next"`. `include`/`exclude` and `paths` stay in the extending app, since TypeScript resolves them relative to the file that declares them.
diff --git a/packages/config/package.json b/packages/config/package.json
index 1512059..5524461 100644
--- a/packages/config/package.json
+++ b/packages/config/package.json
@@ -4,10 +4,12 @@
   "description": "Shared tool configurations for Plexus repos — each an extend-in-one-line subpath export (§ 9 PLX).",
   "license": "GPL-3.0-or-later",
   "files": [
-    "biome.json"
+    "biome.json",
+    "tsconfig-next.json"
   ],
   "exports": {
-    "./biome": "./biome.json"
+    "./biome": "./biome.json",
+    "./tsconfig-next": "./tsconfig-next.json"
   },
   "repository": {
     "type": "git",
diff --git a/packages/config/tsconfig-next.json b/packages/config/tsconfig-next.json
new file mode 100644
index 0000000..ac9997b
--- /dev/null
+++ b/packages/config/tsconfig-next.json
@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ]
+  }
+}