diff --git a/docs/reference/plugins.md b/docs/reference/plugins.md
index ebb2d9d..503252d 100644
--- a/docs/reference/plugins.md
+++ b/docs/reference/plugins.md
@@ -11,7 +11,7 @@ publish npm tooling, grant setup permissions, or deploy resources.
 | --- | --- |
 | Claude Code | Native manifest in the canonical bundle; strict validation and isolated seven-skill discovery gated with CLI `2.1.296`. |
 | GitHub Copilot CLI | Portable manifest; isolated marketplace install and seven-skill discovery gated with CLI `1.0.98`. App discovery additionally needs verification in the user's actual profile. |
-| Codex and Cursor | Their documentation supports the portable Agent Plugins package. Catalogs target the same bundle; native loaders have not been verified here. |
+| Codex (OpenAI) and Cursor | Their documentation supports the portable Agent Plugins package. Codex presentation metadata lives under `extensions["com.openai"]` in [plugin.json](../../plugins/sql-apps/plugin.json), and [.agents/plugins/marketplace.json](../../.agents/plugins/marketplace.json) is the repo marketplace. Native loaders have not been verified here. |
 | Gemini CLI | Native extension manifest inside the same bundle; documented local-directory installation, but loader behavior has not been verified here. |
 | Other assistants | Use the provider-neutral project guides. This is not a claim of native plugin integration. |
 
diff --git a/plugins/sql-apps/plugin.json b/plugins/sql-apps/plugin.json
index 9d4f429..0729135 100644
--- a/plugins/sql-apps/plugin.json
+++ b/plugins/sql-apps/plugin.json
@@ -7,5 +7,17 @@
   "homepage": "https://github.com/microsoft/sql-apps",
   "repository": "https://github.com/microsoft/sql-apps",
   "license": "MIT",
-  "keywords": ["azure-sql", "data-api-builder", "local-development", "application-foundation"]
+  "keywords": ["azure-sql", "data-api-builder", "local-development", "application-foundation"],
+  "extensions": {
+    "com.openai": {
+      "interface": {
+        "displayName": "SQL Apps",
+        "shortDescription": "Build an Azure SQL and Data API Builder application",
+        "developerName": "Microsoft SQL team (mssql)",
+        "category": "Coding",
+        "capabilities": ["Read", "Write"],
+        "websiteURL": "https://github.com/microsoft/sql-apps"
+      }
+    }
+  }
 }
diff --git a/scripts/check-plugin.mjs b/scripts/check-plugin.mjs
index f5977d2..e63a466 100644
--- a/scripts/check-plugin.mjs
+++ b/scripts/check-plugin.mjs
@@ -14,9 +14,11 @@ export async function checkPlugin() {
   assert.equal(manifest.name, 'sql-apps');
   assert.equal(manifest.version, '0.2.3');
   assert.ok(manifest.description?.length);
-  const allowed = new Set(['$schema', 'name', 'version', 'description', 'author', 'homepage', 'repository', 'license', 'keywords']);
+  const allowed = new Set(['$schema', 'name', 'version', 'description', 'author', 'homepage', 'repository', 'license', 'keywords', 'extensions']);
   assert.ok(Object.keys(manifest).every(key => allowed.has(key)), 'Manifest uses only Agent Plugins 1.0 metadata fields');
-  const { $schema, ...metadata } = manifest;
+  assert.deepEqual(Object.keys(manifest.extensions ?? {}), ['com.openai'], 'Only OpenAI presentation metadata is namespaced');
+  assert.ok(manifest.extensions['com.openai'].interface?.displayName, 'Codex presentation metadata is declared');
+  const { $schema, extensions, ...metadata } = manifest;
   assert.deepEqual(JSON.parse(await readFile(join(plugin, '.claude-plugin', 'plugin.json'), 'utf8')), metadata,
     'Claude metadata matches the portable manifest without portable schema fields');
   const gemini = JSON.parse(await readFile(join(plugin, 'gemini-extension.json'), 'utf8'));
diff --git a/tests/plugin.test.ts b/tests/plugin.test.ts
index e1a14c4..3597485 100644
--- a/tests/plugin.test.ts
+++ b/tests/plugin.test.ts
@@ -29,9 +29,18 @@ test('SQL Apps identity is consistent across packages, platform manifests and ma
   const repository = 'https://github.com/microsoft/sql-apps';
   const portable = JSON.parse(await readFile('plugins/sql-apps/plugin.json', 'utf8'));
   const native = JSON.parse(await readFile('plugins/sql-apps/.claude-plugin/plugin.json', 'utf8'));
-  const { $schema, ...metadata } = portable;
+  const { $schema, extensions, ...metadata } = portable;
   assert.equal($schema, 'https://agent-plugins.org/schemas/1.0.0/plugin.schema.json');
   assert.deepEqual(native, metadata, 'Native Claude metadata must match the portable package');
+  assert.deepEqual(Object.keys(extensions), ['com.openai'], 'Only OpenAI presentation metadata is namespaced');
+  assert.deepEqual(extensions['com.openai'].interface, {
+    displayName: 'SQL Apps',
+    shortDescription: 'Build an Azure SQL and Data API Builder application',
+    developerName: 'Microsoft SQL team (mssql)',
+    category: 'Coding',
+    capabilities: ['Read', 'Write'],
+    websiteURL: repository,
+  });
   for (const path of ['plugins/sql-apps/plugin.json', 'plugins/sql-apps/.claude-plugin/plugin.json']) {
     const manifest = JSON.parse(await readFile(path, 'utf8'));
     assert.equal(manifest.name, 'sql-apps', path);