fix: Fix meta being stripped from top-level Zod schema

.changeset/full-hounds-study.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes Zod meta not correctly being rendered on top-level schema when converted into JSON Schema

packages/astro/src/content/types-generator.ts

@@ -633,9 +633,13 @@ async function generateJSONSchema(
 	}
 
 	if (zodSchemaForJson instanceof z.ZodObject) {
+		const existingMeta = z.globalRegistry.get(zodSchemaForJson);
 		zodSchemaForJson = zodSchemaForJson.extend({
 			$schema: z.string().optional(),
 		});
+		if (existingMeta) {
+			z.globalRegistry.add(zodSchemaForJson, existingMeta);
+		}
 	}
 
 	try {

packages/astro/test/data-collections-schema.test.js

@@ -47,11 +47,21 @@ describe('Content Collections - data collections', () => {
 						},
 					},
 					required: ['homepage'],
+					title: 'Translations',
+					description: 'Translation strings for the site',
 				}),
 				JSON.stringify(JSON.parse(rawJson)),
 			);
 		});
 
+		it('Preserves .meta() definitions in the generated JSON schema', async () => {
+			const schema = JSON.parse(
+				await fixture.readFile('../.astro/collections/i18n.schema.json'),
+			);
+			assert.equal(schema.title, 'Translations');
+			assert.equal(schema.description, 'Translation strings for the site');
+		});
+
 		it('Generates schema file when the schema uses the image function', async () => {
 			const schemaExists = await fixture.pathExists('../.astro/collections/image.schema.json');
 			assert.equal(schemaExists, true);

packages/astro/test/fixtures/data-collections-schema/src/content.config.ts

@@ -16,7 +16,7 @@ const i18n = defineCollection({
 			greeting: z.string(),
 			preamble: z.string(),
 		})
-	}),
+	}).meta({ title: 'Translations', description: 'Translation strings for the site' }),
 });
 
 const func = defineCollection({