diff --git a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.test.ts b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.test.ts
index 9eca914db5..fa14fcb017 100644
--- a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.test.ts
+++ b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.test.ts
@@ -419,6 +419,31 @@ describe('ClearcutLogger', () => {
     );
   });
 
+  describe('GH_WORKFLOW_NAME metadata', () => {
+    it('includes workflow name when GH_WORKFLOW_NAME is set', () => {
+      const { logger } = setup({});
+      vi.stubEnv('GH_WORKFLOW_NAME', 'test-workflow');
+
+      const event = logger?.createLogEvent(EventNames.API_ERROR, []);
+      expect(event?.event_metadata[0]).toContainEqual({
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_GH_WORKFLOW_NAME,
+        value: 'test-workflow',
+      });
+    });
+
+    it('does not include workflow name when GH_WORKFLOW_NAME is not set', () => {
+      const { logger } = setup({});
+      vi.stubEnv('GH_WORKFLOW_NAME', undefined);
+
+      const event = logger?.createLogEvent(EventNames.API_ERROR, []);
+      const hasWorkflowName = event?.event_metadata[0].some(
+        (item) =>
+          item.gemini_cli_key === EventMetadataKey.GEMINI_CLI_GH_WORKFLOW_NAME,
+      );
+      expect(hasWorkflowName).toBe(false);
+    });
+  });
+
   describe('logChatCompressionEvent', () => {
     it('logs an event with proper fields', () => {
       const { logger } = setup();
diff --git a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
index a465e9dec8..81a4e771b4 100644
--- a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
+++ b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
@@ -149,6 +149,13 @@ function determineSurface(): string {
   }
 }
 
+/**
+ * Determines the GitHub Actions workflow name if the CLI is running in a GitHub Actions environment.
+ */
+function determineGHWorkflowName(): string | undefined {
+  return process.env['GH_WORKFLOW_NAME'];
+}
+
 /**
  * Clearcut URL to send logging events to.
  */
@@ -260,31 +267,39 @@ export class ClearcutLogger {
     data: EventValue[] = [],
   ): LogEvent {
     const surface = determineSurface();
+    const ghWorkflowName = determineGHWorkflowName();
+    const baseMetadata: EventValue[] = [
+      ...data,
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_SURFACE,
+        value: surface,
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_VERSION,
+        value: CLI_VERSION,
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_GIT_COMMIT_HASH,
+        value: GIT_COMMIT_INFO,
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_OS,
+        value: process.platform,
+      },
+    ];
+
+    if (ghWorkflowName) {
+      baseMetadata.push({
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_GH_WORKFLOW_NAME,
+        value: ghWorkflowName,
+      });
+    }
+
     return {
       console_type: 'GEMINI_CLI',
       application: 102, // GEMINI_CLI
       event_name: eventName as string,
-      event_metadata: [
-        [
-          ...data,
-          {
-            gemini_cli_key: EventMetadataKey.GEMINI_CLI_SURFACE,
-            value: surface,
-          },
-          {
-            gemini_cli_key: EventMetadataKey.GEMINI_CLI_VERSION,
-            value: CLI_VERSION,
-          },
-          {
-            gemini_cli_key: EventMetadataKey.GEMINI_CLI_GIT_COMMIT_HASH,
-            value: GIT_COMMIT_INFO,
-          },
-          {
-            gemini_cli_key: EventMetadataKey.GEMINI_CLI_OS,
-            value: process.platform,
-          },
-        ],
-      ],
+      event_metadata: [baseMetadata],
     };
   }
 
diff --git a/packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts b/packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts
index 55ab78338d..fc64f8a714 100644
--- a/packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts
+++ b/packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts
@@ -7,7 +7,7 @@
 // Defines valid event metadata keys for Clearcut logging.
 export enum EventMetadataKey {
   // Deleted enums: 24
-  // Next ID: 129
+  // Next ID: 131
 
   GEMINI_CLI_KEY_UNKNOWN = 0,
 
@@ -191,6 +191,9 @@ export enum EventMetadataKey {
   // Logs active user settings
   GEMINI_CLI_USER_SETTINGS = 84,
 
+  // Logs the name of the GitHub Action workflow that triggered the session.
+  GEMINI_CLI_GH_WORKFLOW_NAME = 130,
+
   // ==========================================================================
   // Loop Detected Event Keys
   // ===========================================================================