From fa91b7680fc38543da1db0a19378ec44952886c4 Mon Sep 17 00:00:00 2001
From: Heat Hamilton <heat@clerk.dev>
Date: Thu, 25 Sep 2025 20:23:21 -0400
Subject: [PATCH] capture auth component mounted for all SDK types

Update .changeset/pretty-rings-compare.md

Co-authored-by: Dylan Staley <88163+dstaley@users.noreply.github.com>
---
 .changeset/pretty-rings-compare.md            |  5 +++++
 .../src/telemetry/events/component-mounted.ts | 20 +++++++++++++++++--
 2 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/pretty-rings-compare.md

diff --git a/.changeset/pretty-rings-compare.md b/.changeset/pretty-rings-compare.md
new file mode 100644
index 00000000000..a46279fd7b8
--- /dev/null
+++ b/.changeset/pretty-rings-compare.md
@@ -0,0 +1,5 @@
+---
+"@clerk/shared": patch
+---
+
+Increase sampling for high-signal auth components on mount.
diff --git a/packages/shared/src/telemetry/events/component-mounted.ts b/packages/shared/src/telemetry/events/component-mounted.ts
index 3b63d75e8b8..940f8a1a943 100644
--- a/packages/shared/src/telemetry/events/component-mounted.ts
+++ b/packages/shared/src/telemetry/events/component-mounted.ts
@@ -4,6 +4,19 @@ const EVENT_COMPONENT_MOUNTED = 'COMPONENT_MOUNTED';
 const EVENT_COMPONENT_OPENED = 'COMPONENT_OPENED';
 const EVENT_SAMPLING_RATE = 0.1;
 
+/** Increase sampling for high-signal auth components on mount. */
+const AUTH_COMPONENTS = new Set<string>(['SignIn', 'SignUp']);
+
+/**
+ * Returns the per-event sampling rate for component-mounted telemetry events.
+ * Uses a higher rate for SignIn/SignUp to improve signal quality.
+ *
+ *  @internal
+ */
+function getComponentMountedSamplingRate(component: string): number {
+  return AUTH_COMPONENTS.has(component) ? 1 : EVENT_SAMPLING_RATE;
+}
+
 type ComponentMountedBase = {
   component: string;
 };
@@ -18,6 +31,8 @@ type EventPrebuiltComponent = ComponentMountedBase & {
 type EventComponentMounted = ComponentMountedBase & TelemetryEventRaw['payload'];
 
 /**
+ * Factory for prebuilt component telemetry events.
+ *
  * @internal
  */
 function createPrebuiltComponentEvent(event: typeof EVENT_COMPONENT_MOUNTED | typeof EVENT_COMPONENT_OPENED) {
@@ -28,7 +43,8 @@ function createPrebuiltComponentEvent(event: typeof EVENT_COMPONENT_MOUNTED | ty
   ): TelemetryEventRaw<EventPrebuiltComponent> {
     return {
       event,
-      eventSamplingRate: EVENT_SAMPLING_RATE,
+      eventSamplingRate:
+        event === EVENT_COMPONENT_MOUNTED ? getComponentMountedSamplingRate(component) : EVENT_SAMPLING_RATE,
       payload: {
         component,
         appearanceProp: Boolean(props?.appearance),
@@ -91,7 +107,7 @@ export function eventComponentMounted(
 ): TelemetryEventRaw<EventComponentMounted> {
   return {
     event: EVENT_COMPONENT_MOUNTED,
-    eventSamplingRate: EVENT_SAMPLING_RATE,
+    eventSamplingRate: getComponentMountedSamplingRate(component),
     payload: {
       component,
       ...props,