Remove multi-recipient support from Plunk driver

app/src/core/drivers/email/plunk.spec.ts

@@ -52,41 +52,4 @@ describe.skipIf(ALL_TESTS)("plunk", () => {
 		expect(response).toBeDefined();
 		expect(response.success).toBe(true);
 	});
-
-	it("should send to multiple recipients", async () => {
-		const driver = plunkEmail({
-			apiKey: process.env.PLUNK_API_KEY!,
-			from: undefined,
-		});
-		const response = await driver.send(
-			"help@bknd.io",
-			"Multi-recipient Test",
-			"Test email to multiple recipients",
-			{
-				to: ["help@bknd.io", "cameronandrewpak@gmail.com"],
-			},
-		);
-		expect(response).toBeDefined();
-		expect(response.success).toBe(true);
-		expect(response.emails).toHaveLength(2);
-	});
-
-	it("should throw error for more than 5 recipients", async () => {
-		const driver = plunkEmail({
-			apiKey: process.env.PLUNK_API_KEY!,
-			from: undefined,
-		});
-		expect(
-			driver.send("help@bknd.io", "Test", "Test", {
-				to: [
-					"help@bknd.io",
-					"test2@example.com",
-					"test3@example.com",
-					"test4@example.com",
-					"test5@example.com",
-					"test6@example.com",
-				],
-			}),
-		).rejects.toThrow("Plunk supports a maximum of 5 recipients per email");
-	});
 });

app/src/core/drivers/email/plunk.ts

@@ -7,7 +7,6 @@ export type PlunkEmailOptions = {
 };
 
 export type PlunkEmailSendOptions = {
-	to?: string | string[];
 	subscribed?: boolean;
 	name?: string;
 	from?: string;
@@ -40,48 +39,25 @@ export const plunkEmail = (
 			body: string | { text: string; html: string },
 			options?: PlunkEmailSendOptions,
 		) => {
-			// Determine recipients - options.to takes precedence if provided
-			const recipients = options?.to ?? to;
-
-			// Validate recipient count (Plunk max is 5)
-			const recipientArray = Array.isArray(recipients)
-				? recipients
-				: [recipients];
-			if (recipientArray.length > 5) {
-				throw new Error(
-					"Plunk supports a maximum of 5 recipients per email",
-				);
-			}
-
-			// Build base payload
 			const payload: any = {
-				to: recipients,
+			  from,
+				to,
 				subject,
 			};
 
-			// Handle body - Plunk only accepts a single body field
 			if (typeof body === "string") {
 				payload.body = body;
 			} else {
-				// When both text and html are provided, send html (degrades gracefully)
 				payload.body = body.html;
 			}
 
-			// Add optional fields from config
-			if (from) {
-				payload.from = from;
-			}
-
-			// Merge with additional options (excluding 'to' since we already handled it)
-			const { to: _, ...restOptions } = options ?? {};
-
 			const res = await fetch(host, {
 				method: "POST",
 				headers: {
 					"Content-Type": "application/json",
 					Authorization: `Bearer ${config.apiKey}`,
 				},
-				body: JSON.stringify({ ...payload, ...restOptions }),
+				body: JSON.stringify({ ...payload, ...options }),
 			});
 
 			if (!res.ok) {