workers-builds-notifications-template: Fix empty Discord webhook messages

workers-builds-notifications-template/README.md

@@ -164,16 +164,20 @@ Subscribe your queue to Workers Builds events.
 wrangler queues subscription create builds-event-subscriptions \
   --source workersBuilds.worker \
   --events build.succeeded,build.failed \
-  --worker-name <YOUR_CONSUMER_WORKER_NAME>
+  --worker-name <YOUR_SOURCE_BUILD_WORKER_NAME>
 ```
 
+> `--worker-name` is the source Worker being built (the project you want notifications for), not the queue consumer Worker.
+>
+> To receive notifications for multiple projects, create one subscription per source Worker name.
+>
 > For more details, see [Event Subscriptions Documentation](https://developers.cloudflare.com/queues/event-subscriptions/)
 
 ---
 
 ### 7. Test It!
 
-Trigger a build on any worker in your account. You should see a notification in your channel within seconds!
+Trigger a build on a worker you subscribed to. You should see a notification in your channel within seconds!
 
 ---
 
@@ -182,11 +186,12 @@ Trigger a build on any worker in your account. You should see a notification in
 ```
 ┌─────────────────┐     ┌─────────────┐     ┌──────────────────┐     ┌─────────┐
 │ Workers Builds  │────▶│   Queue     │────▶│ This Consumer    │────▶│ Webhook │
-│ (any worker)    │     │             │     │ Worker           │     │         │
+│ (subscribed     │     │             │     │ Worker           │     │         │
+│ worker(s))      │     │             │     │                  │     │         │
 └─────────────────┘     └─────────────┘     └──────────────────┘     └─────────┘
 ```
 
-1. **Any worker** in your account triggers a build
+1. A **subscribed worker** in your account triggers a build
 2. **Workers Builds** publishes an event to your **Queue**
 3. **This consumer worker** processes the event and sends a notification to your **webhook**
 

workers-builds-notifications-template/src/slack.ts

@@ -25,6 +25,7 @@ import {
 // =============================================================================
 
 export interface SlackPayload {
+	text?: string;
 	blocks: KnownBlock[];
 }
 
@@ -128,7 +129,7 @@ function buildSuccessMessage(
 		blocks.push(buildContextBlock(contextElements));
 	}
 
-	return { blocks };
+	return { text: `✅ ${title}: ${workerName}`, blocks };
 }
 
 function buildFailureMessage(
@@ -159,7 +160,7 @@ function buildFailureMessage(
 		text: { type: "mrkdwn", text: `\`\`\`${error}\`\`\`` },
 	});
 
-	return { blocks };
+	return { text: `❌ Build Failed: ${workerName}`, blocks };
 }
 
 function buildCancelledMessage(event: CloudflareEvent): SlackPayload {
@@ -179,11 +180,12 @@ function buildCancelledMessage(event: CloudflareEvent): SlackPayload {
 		blocks.push(buildContextBlock(contextElements));
 	}
 
-	return { blocks };
+	return { text: `⚠️ Build Cancelled: ${workerName}`, blocks };
 }
 
 function buildFallbackMessage(event: CloudflareEvent): SlackPayload {
 	return {
+		text: `📢 ${event.type || "Unknown event"}`,
 		blocks: [
 			{
 				type: "section",
@@ -232,13 +234,21 @@ export async function sendSlackNotification(
 	webhookUrl: string,
 	payload: SlackPayload,
 ): Promise<void> {
+	const body = JSON.stringify({
+		...payload,
+		text: payload.text || "Workers Build Notification",
+	});
+
 	const response = await fetch(webhookUrl, {
 		method: "POST",
 		headers: { "Content-Type": "application/json" },
-		body: JSON.stringify(payload),
+		body,
 	});
 
 	if (!response.ok) {
-		console.error("Slack API error:", response.status, await response.text());
+		const responseText = await response.text();
+		console.error(
+			`Slack API error: ${response.status} - ${responseText}. Payload: ${body}`,
+		);
 	}
 }