fix: small doc updates

CONTRIBUTING.md

@@ -48,6 +48,12 @@ Do not run `nitrogen` directly unless you also rerun:
 yarn nitrogen:patch
 ```
 
+To verify that the generated iOS component still contains the required Fabric lifecycle hooks, run:
+
+```sh
+yarn nitrogen:verify
+```
+
 The [example app](/example/) demonstrates usage of the library. You need to run it to test any changes you make.
 
 It is configured to use the local version of the library, so any changes you make to the library's source code will be reflected in the example app. Changes to the library's JavaScript code will be reflected in the example app without a rebuild, but native code changes will require a rebuild of the example app.

package.json

@@ -39,6 +39,7 @@
     "prepare": "bob build",
     "nitrogen:generate": "nitrogen",
     "nitrogen:patch": "node scripts/patch-nitrogen-scroll-edge-bar.js",
+    "nitrogen:verify": "node scripts/verify-nitrogen-scroll-edge-bar.js",
     "nitrogen": "yarn nitrogen:generate ./src && yarn nitrogen:patch",
     "typecheck": "tsc",
     "lint": "eslint \"**/*.{js,ts,tsx}\"",

scripts/verify-nitrogen-scroll-edge-bar.js

@@ -0,0 +1,40 @@
+const fs = require('fs');
+const path = require('path');
+
+const file = path.join(
+  __dirname,
+  '..',
+  'nitrogen',
+  'generated',
+  'ios',
+  'c++',
+  'views',
+  'HybridRNScrollEdgeBarComponent.mm'
+);
+
+if (!fs.existsSync(file)) {
+  console.error(`Missing generated file: ${file}`);
+  process.exit(1);
+}
+
+const source = fs.readFileSync(file, 'utf8');
+const checks = [
+  '+ (BOOL)shouldBeRecycled {',
+  'return NO;',
+  '- (void)invalidate',
+  'prepareForFabricUnmount',
+  '- (void)unmountChildComponentView:(UIView<RCTComponentViewProtocol> *)childComponentView',
+  '[super unmountChildComponentView:childComponentView index:index];',
+];
+
+const missing = checks.filter((needle) => !source.includes(needle));
+
+if (missing.length > 0) {
+  console.error('Nitrogen patch verification failed. Missing markers:');
+  for (const item of missing) {
+    console.error(`- ${item}`);
+  }
+  process.exit(1);
+}
+
+console.log('Nitrogen patch verification passed.');