diff --git a/packages/cli-kit/src/private/node/__snapshots__/otel-metrics.test.ts.snap b/packages/cli-kit/src/private/node/__snapshots__/otel-metrics.test.ts.snap
index 3a1d3fdc918..45151db9f5b 100644
--- a/packages/cli-kit/src/private/node/__snapshots__/otel-metrics.test.ts.snap
+++ b/packages/cli-kit/src/private/node/__snapshots__/otel-metrics.test.ts.snap
@@ -8,6 +8,7 @@ exports[`otel-metrics > logs metrics when activated 1`] = `
     {
       "cli_version": "pre",
       "exit": "ok",
+      "is_first_party": "false",
       "job": "@shopify/app::app dev",
     },
   ],
@@ -17,6 +18,7 @@ exports[`otel-metrics > logs metrics when activated 1`] = `
     {
       "cli_version": "pre",
       "exit": "ok",
+      "is_first_party": "false",
       "job": "@shopify/app::app dev",
     },
   ],
@@ -26,6 +28,7 @@ exports[`otel-metrics > logs metrics when activated 1`] = `
     {
       "cli_version": "pre",
       "exit": "ok",
+      "is_first_party": "false",
       "job": "@shopify/app::app dev",
       "stage": "active",
     },
@@ -36,6 +39,7 @@ exports[`otel-metrics > logs metrics when activated 1`] = `
     {
       "cli_version": "pre",
       "exit": "ok",
+      "is_first_party": "false",
       "job": "@shopify/app::app dev",
       "stage": "network",
     },
@@ -46,6 +50,7 @@ exports[`otel-metrics > logs metrics when activated 1`] = `
     {
       "cli_version": "pre",
       "exit": "ok",
+      "is_first_party": "false",
       "job": "@shopify/app::app dev",
       "stage": "prompt",
     },
@@ -58,14 +63,16 @@ exports[`otel-metrics > outputs debug information when deactivated 1`] = `
   "labels": {
     "exit": "ok",
     "job": "@shopify/app::app dev",
-    "cli_version": "nightly"
+    "cli_version": "nightly",
+    "is_first_party": "false"
   }
 }
 [OTEL] record cli_commands_duration_ms histogram 10ms {
   "labels": {
     "exit": "ok",
     "job": "@shopify/app::app dev",
-    "cli_version": "nightly"
+    "cli_version": "nightly",
+    "is_first_party": "false"
   }
 }
 [OTEL] record cli_commands_wall_clock_elapsed_ms histogram stage="active" 10ms
diff --git a/packages/cli-kit/src/private/node/otel-metrics.test.ts b/packages/cli-kit/src/private/node/otel-metrics.test.ts
index 0209846d62a..a8855ae5c79 100644
--- a/packages/cli-kit/src/private/node/otel-metrics.test.ts
+++ b/packages/cli-kit/src/private/node/otel-metrics.test.ts
@@ -1,8 +1,12 @@
 import {recordMetrics} from './otel-metrics.js'
 import {mockAndCaptureOutput} from '../../public/node/testing/output.js'
-import {describe, expect, test, vi} from 'vitest'
+import {afterEach, describe, expect, test, vi} from 'vitest'
 
 describe('otel-metrics', () => {
+  afterEach(() => {
+    vi.unstubAllEnvs()
+  })
+
   test('outputs debug information when deactivated', async () => {
     const outputMock = mockAndCaptureOutput()
 
@@ -53,4 +57,38 @@ describe('otel-metrics', () => {
     expect(mockOtelCreator).toHaveBeenCalledOnce()
     expect(mockOtelRecorder.mock.calls).toMatchSnapshot()
   })
+
+  test('labels metrics as first-party when the 1P dev path is enabled', async () => {
+    vi.stubEnv('SHOPIFY_CLI_1P_DEV', '1')
+    const mockOtelRecorder = vi.fn()
+    const mockOtelCreator = vi.fn()
+    mockOtelCreator.mockReturnValue({
+      type: 'otel',
+      otel: {
+        record: mockOtelRecorder,
+      },
+    })
+
+    await recordMetrics(
+      {
+        skipMetricAnalytics: false,
+        cliVersion: '3.49.1-pre.0',
+        owningPlugin: '@shopify/app',
+        command: 'app dev',
+        exitMode: 'ok',
+      },
+      {
+        active: 10,
+        network: 20,
+        prompt: 30,
+      },
+      mockOtelCreator,
+    )
+
+    const recordedLabels = mockOtelRecorder.mock.calls.map((call) => call[2])
+    expect(recordedLabels.length).toBeGreaterThan(0)
+    recordedLabels.forEach((labels) => {
+      expect(labels).toMatchObject({is_first_party: 'true'})
+    })
+  })
 })
diff --git a/packages/cli-kit/src/private/node/otel-metrics.ts b/packages/cli-kit/src/private/node/otel-metrics.ts
index 5e0545503a9..dd1d1a1dba6 100644
--- a/packages/cli-kit/src/private/node/otel-metrics.ts
+++ b/packages/cli-kit/src/private/node/otel-metrics.ts
@@ -4,7 +4,7 @@ import {
   DefaultOtelService,
   DefaultOtelServiceOptions,
 } from '../../public/node/vendor/otel-js/service/DefaultOtelService/DefaultOtelService.js'
-import {isUnitTest, opentelemetryDomain} from '../../public/node/context/local.js'
+import {firstPartyDev, isUnitTest, opentelemetryDomain} from '../../public/node/context/local.js'
 import {ValueType, diag} from '@opentelemetry/api'
 
 type MetricRecorder =
@@ -20,6 +20,7 @@ type Labels = {
   exit: string
   job: string
   cli_version: string
+  is_first_party: string
 }
 
 interface Timing {
@@ -76,6 +77,10 @@ export async function recordMetrics(
     exit: options.exitMode,
     job: `${options.owningPlugin}::${options.command}`,
     cli_version: regularisedCliVersion,
+    // Distinguishes Shopify first-party (1P) developers from third-party developers so the
+    // CLI guardrail dashboards can be scoped to 1P. Keyed off the 1P dev path
+    // (SHOPIFY_CLI_1P_DEV), the same signal that sets the X-Shopify-Cli-Employee header.
+    is_first_party: firstPartyDev() ? 'true' : 'false',
   }
 
   recordCommandCounter(recorder, labels)