fix(astro): correctly change configuration when node adapter is added (#6333)

Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

2 files changed, 20 insertions, 1 deletions

diff --git a/.changeset/swift-islands-promise.md b/.changeset/swift-islands-promise.md
new file mode 100644
index 000000000..0f2924287
--- /dev/null
+++ b/.changeset/swift-islands-promise.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Correctly emit mode when passing `node` to the command `astro add`
diff --git a/packages/astro/src/core/add/index.ts b/packages/astro/src/core/add/index.ts
index 02e49b754..d90075ce7 100644
--- a/packages/astro/src/core/add/index.ts
+++ b/packages/astro/src/core/add/index.ts
@@ -457,7 +457,21 @@ async function setAdapter(ast: t.File, adapter: IntegrationInfo, exportName: str
 				return false;
 			}) as t.ObjectProperty | undefined;
 
-			const adapterCall = t.callExpression(adapterId, []);
+			let adapterCall;
+			switch (adapter.id) {
+				// the node adapter requires a mode
+				case 'node': {
+					adapterCall = t.callExpression(adapterId, [
+						t.objectExpression([
+							t.objectProperty(t.identifier('mode'), t.stringLiteral('standalone')),
+						]),
+					]);
+					break;
+				}
+				default: {
+					adapterCall = t.callExpression(adapterId, []);
+				}
+			}
 
 			if (!adapterProp) {
 				configObject.properties.push(t.objectProperty(t.identifier('adapter'), adapterCall));