feat: add default fetch configuration and set Node 18+ requirement

## Changes

- Service getters now provide default fetch configuration when no config is passed
- Removed defensive error checking in favor of sensible defaults
- Added Node.js 18+ engine requirement to package.json
- Updated README to document Node.js 18+ requirement

## Benefits

- Simpler code without defensive error checking
- Services work "out of the box" without requiring provider or config
- Aligns with modern JavaScript ecosystem standards (Node 18 is reasonable minimum)
- Cleaner developer experience with automatic fetch fallback

## Default Behavior

When no config is provided, service getters now default to:
- Browser: `window.fetch.bind(window)`
- Node.js 18+: `globalThis.fetch`

This ensures services always have a working fetch implementation without requiring explicit configuration.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: kyleamazza-fq

README.md

@@ -5,6 +5,11 @@
 
 [Basketry generator](https://basketry.io) for generating React Query queryOptions and hooks. This generator can be coupled with any Basketry parser.
 
+## Requirements
+
+- Node.js 18.0.0 or higher (for native fetch support)
+- React Query v5
+
 ## Quick Start
 
 ### Installation

package.json

@@ -37,6 +37,9 @@
   },
   "homepage": "https://basketry.io/docs/components/@basketry/react-query",
   "funding": "https://github.com/sponsors/basketry",
+  "engines": {
+    "node": ">=18.0.0"
+  },
   "devDependencies": {
     "@basketry/dotfiles": "^1.1.0",
     "@types/jest": "^27.4.0",

src/context-file.ts

@@ -75,10 +75,9 @@ export class ContextFile extends ModuleBuilder {
       // Add service getter function (v0.3.0)
       yield ``;
       yield `export const ${getterName} = (config?: ${contextPropsName}) => {`;
-      yield `  const serviceConfig = config ?? getCurrentContext();`;
-      yield `  if (!serviceConfig) {`;
-      yield `    throw new Error('${getterName}: Configuration required. Either pass config parameter or wrap component in ${providerName}.');`;
-      yield `  }`;
+      yield `  const serviceConfig = config ?? getCurrentContext() ?? {`;
+      yield `    fetch: typeof window !== 'undefined' ? window.fetch.bind(window) : globalThis.fetch`;
+      yield `  };`;
       yield `  const ${localName}: ${this.types.type(
         interfaceName,
       )} = new ${this.client.fn(

src/snapshot/v1/hooks/context.tsx

@@ -78,12 +78,13 @@ export const BasketryExampleProvider: FC<
 export const getAuthPermutationService = (
   config?: BasketryExampleContextProps,
 ) => {
-  const serviceConfig = config ?? getCurrentContext();
-  if (!serviceConfig) {
-    throw new Error(
-      'getAuthPermutationService: Configuration required. Either pass config parameter or wrap component in BasketryExampleProvider.',
-    );
-  }
+  const serviceConfig = config ??
+    getCurrentContext() ?? {
+      fetch:
+        typeof window !== 'undefined'
+          ? window.fetch.bind(window)
+          : globalThis.fetch,
+    };
   const authPermutationService: AuthPermutationService =
     new HttpAuthPermutationService(
       serviceConfig.fetch ??
@@ -111,12 +112,13 @@ export const useAuthPermutationService = () => {
 };
 
 export const getExhaustiveService = (config?: BasketryExampleContextProps) => {
-  const serviceConfig = config ?? getCurrentContext();
-  if (!serviceConfig) {
-    throw new Error(
-      'getExhaustiveService: Configuration required. Either pass config parameter or wrap component in BasketryExampleProvider.',
-    );
-  }
+  const serviceConfig = config ??
+    getCurrentContext() ?? {
+      fetch:
+        typeof window !== 'undefined'
+          ? window.fetch.bind(window)
+          : globalThis.fetch,
+    };
   const exhaustiveService: ExhaustiveService = new HttpExhaustiveService(
     serviceConfig.fetch ??
       (typeof window !== 'undefined'
@@ -142,12 +144,13 @@ export const useExhaustiveService = () => {
 };
 
 export const getGizmoService = (config?: BasketryExampleContextProps) => {
-  const serviceConfig = config ?? getCurrentContext();
-  if (!serviceConfig) {
-    throw new Error(
-      'getGizmoService: Configuration required. Either pass config parameter or wrap component in BasketryExampleProvider.',
-    );
-  }
+  const serviceConfig = config ??
+    getCurrentContext() ?? {
+      fetch:
+        typeof window !== 'undefined'
+          ? window.fetch.bind(window)
+          : globalThis.fetch,
+    };
   const gizmoService: GizmoService = new HttpGizmoService(
     serviceConfig.fetch ??
       (typeof window !== 'undefined'
@@ -173,12 +176,13 @@ export const useGizmoService = () => {
 };
 
 export const getWidgetService = (config?: BasketryExampleContextProps) => {
-  const serviceConfig = config ?? getCurrentContext();
-  if (!serviceConfig) {
-    throw new Error(
-      'getWidgetService: Configuration required. Either pass config parameter or wrap component in BasketryExampleProvider.',
-    );
-  }
+  const serviceConfig = config ??
+    getCurrentContext() ?? {
+      fetch:
+        typeof window !== 'undefined'
+          ? window.fetch.bind(window)
+          : globalThis.fetch,
+    };
   const widgetService: WidgetService = new HttpWidgetService(
     serviceConfig.fetch ??
       (typeof window !== 'undefined'