diff --git a/next/package.json b/next/package.json
index 7b9484d..7bc2aca 100644
--- a/next/package.json
+++ b/next/package.json
@@ -36,6 +36,7 @@
     "babel-jest": "^29.7.0",
     "eslint": "^9.18.0",
     "jest": "^29.7.0",
+    "json-schema-typed": "^8.0.1",
     "tsup": "^8.3.5",
     "typescript": "^5.7.3"
   }
diff --git a/next/pnpm-lock.yaml b/next/pnpm-lock.yaml
index f039c5a..a995f49 100644
--- a/next/pnpm-lock.yaml
+++ b/next/pnpm-lock.yaml
@@ -32,6 +32,9 @@ importers:
       jest:
         specifier: ^29.7.0
         version: 29.7.0(@types/node@22.10.7)(ts-node@10.9.2(@types/node@22.10.7)(typescript@5.7.3))
+      json-schema-typed:
+        specifier: ^8.0.1
+        version: 8.0.1
       tsup:
         specifier: ^8.3.5
         version: 8.3.5(postcss@8.5.1)(typescript@5.7.3)(yaml@2.7.0)
@@ -2276,6 +2279,9 @@ packages:
   json-schema-traverse@0.4.1:
     resolution: {integrity: sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==}
 
+  json-schema-typed@8.0.1:
+    resolution: {integrity: sha512-XQmWYj2Sm4kn4WeTYvmpKEbyPsL7nBsb647c7pMe6l02/yx2+Jfc4dT6UZkEXnIUb5LhD55r2HPsJ1milQ4rDg==}
+
   json-stable-stringify-without-jsonify@1.0.1:
     resolution: {integrity: sha512-Bdboy+l7tA3OGW6FjyFHWkP5LuByj1Tk33Ljyq0axyzdk9//JSi2u3fP1QSmd1KNwq6VOKYGlAu87CisVir6Pw==}
 
@@ -5901,6 +5907,8 @@ snapshots:
 
   json-schema-traverse@0.4.1: {}
 
+  json-schema-typed@8.0.1: {}
+
   json-stable-stringify-without-jsonify@1.0.1: {}
 
   json5@2.2.3: {}
diff --git a/next/src/form.ts b/next/src/form.ts
index 4d31a46..48e84e5 100644
--- a/next/src/form.ts
+++ b/next/src/form.ts
@@ -1,3 +1,5 @@
-export function createHeadlessForm(): never {
+import type { JsfSchema } from './types'
+
+export function createHeadlessForm(_schema: JsfSchema): never {
   throw new Error('Not implemented')
 }
diff --git a/next/src/types.ts b/next/src/types.ts
new file mode 100644
index 0000000..e8c456d
--- /dev/null
+++ b/next/src/types.ts
@@ -0,0 +1,9 @@
+import type { JSONSchema } from 'json-schema-typed/draft-2020-12'
+
+export type JsfSchema = Exclude<JSONSchema, boolean> & {
+  'x-jsf-logic'?: {
+    validations: Record<string, object>
+    computedValues: Record<string, object>
+  }
+  'x-jsf-order'?: string[]
+}
diff --git a/next/tsconfig.json b/next/tsconfig.json
index db4b8b7..b2cd795 100644
--- a/next/tsconfig.json
+++ b/next/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "target": "ES2020",
     "module": "ESNext",
+    "moduleResolution": "bundler",
     "strict": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,