fix(client): filter Chrome extension receiving-end Sentry noise (KODY-CLOUDFLARE-4F)

packages/worker/client/sentry-browser-filters.node.test.ts

@@ -4,6 +4,7 @@ import {
 	filterBrowserInjectedGlobalNoiseSentryEvent,
 	filterBrowserSentryEvent,
 	filterChromeExtensionObjectNotFoundSentryEvent,
+	filterChromeExtensionReceivingEndMissingSentryEvent,
 	filterFathomRemoveChildNullSentryEvent,
 	filterFirefoxDomPermissionDeniedSentryEvent,
 	filterMetaMaskExtensionSentryEvent,
@@ -216,6 +217,59 @@ test('browser Sentry filters drop AbortError and Firefox Xray noise and keep rea
 		}),
 	).toBeNull()
 
+	// Chrome extension receiving-end missing (issue 7662064169 / KODY-CLOUDFLARE-4F).
+	expect(
+		filterChromeExtensionReceivingEndMissingSentryEvent({
+			exception: {
+				values: [
+					{
+						type: 'Error',
+						value:
+							'Could not establish connection. Receiving end does not exist.',
+					},
+				],
+			},
+		}),
+	).toBeNull()
+	expect(
+		filterChromeExtensionReceivingEndMissingSentryEvent(
+			{
+				exception: {
+					values: [{ type: 'Error', value: 'something else' }],
+				},
+			},
+			new Error(
+				'Could not establish connection. Receiving end does not exist.',
+			),
+		),
+	).toBeNull()
+	expect(
+		filterBrowserSentryEvent({
+			exception: {
+				values: [
+					{
+						type: 'Error',
+						value:
+							'Error: Could not establish connection. Receiving end does not exist.',
+					},
+				],
+			},
+		}),
+	).toBeNull()
+	// Nearby connection wording from app code must not be dropped.
+	expect(
+		filterChromeExtensionReceivingEndMissingSentryEvent({
+			exception: {
+				values: [
+					{
+						type: 'Error',
+						value: 'Could not establish connection to the MCP server.',
+					},
+				],
+			},
+		}),
+	).not.toBeNull()
+
 	// MetaMask inpage.js session restore (issue 7658961865 / KODY-CLOUDFLARE-3X).
 	expect(
 		filterMetaMaskExtensionSentryEvent({

packages/worker/client/sentry-browser-filters.ts

@@ -323,6 +323,59 @@ export function filterChromeExtensionObjectNotFoundSentryEvent<
 	return event
 }
 
+/**
+ * Chrome/Firefox extension messaging noise: content scripts and page-injected
+ * extension code call `chrome.runtime.sendMessage` / `browser.runtime.sendMessage`
+ * when the extension's background/service worker (or another receiving end) is
+ * gone — unloaded, updated, or never registered for that tab. Chromium rejects
+ * with this exact IPC wording. The promise often surfaces on the host page with
+ * no app stack frames (Sentry attributes the culprit to the document URL).
+ *
+ * Signature from production issue 7662064169 / KODY-CLOUDFLARE-4F (Chrome on
+ * https://heykody.app/, zero frames, handled generic capture). Kody never uses
+ * `chrome.runtime` / `browser.runtime`. Match is intentionally narrow: only
+ * this exact "Could not establish connection. Receiving end does not exist"
+ * wording (optional `Error:` preface). Never blanket-drop connection errors.
+ */
+const chromeExtensionReceivingEndMissingMessage =
+	/^(?:Error:\s*)?Could not establish connection\. Receiving end does not exist\.?$/
+
+export function isChromeExtensionReceivingEndMissingMessage(message: string) {
+	return chromeExtensionReceivingEndMissingMessage.test(message.trim())
+}
+
+export function isChromeExtensionReceivingEndMissingError(error: unknown) {
+	if (typeof error === 'string') {
+		return isChromeExtensionReceivingEndMissingMessage(error)
+	}
+	if (typeof error !== 'object' || error === null) return false
+	if (!('message' in error) || typeof error.message !== 'string') return false
+	return isChromeExtensionReceivingEndMissingMessage(error.message)
+}
+
+export function isChromeExtensionReceivingEndMissingSentryEvent(
+	event: SentryErrorEventLike,
+	originalException?: unknown,
+) {
+	if (isChromeExtensionReceivingEndMissingError(originalException)) return true
+	return sentryEventMessages(event).some(
+		(message) =>
+			typeof message === 'string' &&
+			isChromeExtensionReceivingEndMissingMessage(message),
+	)
+}
+
+export function filterChromeExtensionReceivingEndMissingSentryEvent<
+	T extends SentryErrorEventLike,
+>(event: T, originalException?: unknown): T | null {
+	if (
+		isChromeExtensionReceivingEndMissingSentryEvent(event, originalException)
+	) {
+		return null
+	}
+	return event
+}
+
 /**
  * MetaMask (`chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/…`) injects
  * `inpage.js` into every page and tries to restore a wallet session on load.
@@ -536,6 +589,14 @@ export function filterBrowserSentryEvent<T extends SentryErrorEventLike>(
 	) {
 		return null
 	}
+	if (
+		filterChromeExtensionReceivingEndMissingSentryEvent(
+			event,
+			originalException,
+		) === null
+	) {
+		return null
+	}
 	if (filterMetaMaskExtensionSentryEvent(event, originalException) === null) {
 		return null
 	}

packages/worker/client/sentry-init.ts

@@ -32,14 +32,15 @@ export function initBrowserSentry(config: SentryClientConfig) {
 		// permission-denied from Replay/hydration on restricted nodes,
 		// injected wallet/`__firefox__` globals, Fathom beacon
 		// removeChild-on-null, Chrome extension IPC "Object Not Found
-		// Matching Id…", MetaMask inpage connect failures, Twitter/X
-		// in-app browser chrome `CONFIG` ReferenceErrors, and injected
-		// unguarded `meta[property='og:type']` probes from `global code`) —
-		// see filterBrowserSentryEvent / KODY-CLOUDFLARE-23 /
+		// Matching Id…", Chrome/Firefox extension "Receiving end does not
+		// exist", MetaMask inpage connect failures, Twitter/X in-app browser
+		// chrome `CONFIG` ReferenceErrors, and injected unguarded
+		// `meta[property='og:type']` probes from `global code`) — see
+		// filterBrowserSentryEvent / KODY-CLOUDFLARE-23 /
 		// KODY-CLOUDFLARE-3Q / KODY-CLOUDFLARE-3S / KODY-CLOUDFLARE-3X /
-		// KODY-CLOUDFLARE-43 / KODY-CLOUDFLARE-46 / issues 7639685398,
-		// 7648833360, 7648833403, 7653117289, 7655189301, 7658961865,
-		// 7659616372, 7660258027.
+		// KODY-CLOUDFLARE-43 / KODY-CLOUDFLARE-46 / KODY-CLOUDFLARE-4F /
+		// issues 7639685398, 7648833360, 7648833403, 7653117289, 7655189301,
+		// 7658961865, 7659616372, 7660258027, 7662064169.
 		beforeSend(event, hint) {
 			return filterBrowserSentryEvent(event, hint.originalException)
 		},