From 6d65c4e27f82167f2a20fc574fc3b4e8aff814bc Mon Sep 17 00:00:00 2001
From: "n8n-assistant[bot]"
 <100856346+n8n-assistant[bot]@users.noreply.github.com>
Date: Thu, 6 Aug 2026 09:22:24 +0000
Subject: [PATCH] fix: Send n8n version on backend posthog flag retrieval
 (backport to release-candidate/2.34.x) (#35712)
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Co-authored-by: Dimitri Lavrenük <20122620+dlavrenuek@users.noreply.github.com>
---
 packages/cli/src/posthog/__tests__/posthog.test.ts | 3 +++
 packages/cli/src/posthog/index.ts                  | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/packages/cli/src/posthog/__tests__/posthog.test.ts b/packages/cli/src/posthog/__tests__/posthog.test.ts
index de2af94983d..e4833d1f1cf 100644
--- a/packages/cli/src/posthog/__tests__/posthog.test.ts
+++ b/packages/cli/src/posthog/__tests__/posthog.test.ts
@@ -6,6 +6,7 @@ import { PostHog } from 'posthog-node';
 import type { Mock } from 'vitest';
 import { mock } from 'vitest-mock-extended';
 
+import { N8N_VERSION } from '@/constants';
 import { PostHogClient } from '@/posthog';
 
 vi.mock('posthog-node');
@@ -161,6 +162,8 @@ describe('PostHog', () => {
 			expect(PostHog.prototype.evaluateFlags).toHaveBeenCalledWith(`${instanceId}#${userId}`, {
 				personProperties: {
 					created_at_timestamp: createdAt.getTime().toString(),
+					instance_id: instanceId,
+					version_cli: N8N_VERSION,
 				},
 				groups: { company: instanceId },
 			});
diff --git a/packages/cli/src/posthog/index.ts b/packages/cli/src/posthog/index.ts
index 0aa28932929..7a014341aba 100644
--- a/packages/cli/src/posthog/index.ts
+++ b/packages/cli/src/posthog/index.ts
@@ -11,6 +11,8 @@ import { InstanceSettings } from 'n8n-core';
 import type { FeatureFlags, ITelemetryTrackProperties } from 'n8n-workflow';
 import type { PostHog, FeatureFlagEvaluations } from 'posthog-node';
 
+import { N8N_VERSION } from '@/constants';
+
 /**
  * PostHog group type for instance-level properties.
  * Note: Aliased as "instance" on PostHog dashboard
@@ -136,6 +138,8 @@ export class PostHogClient {
 		const evaluatedFlags = await this.postHog.evaluateFlags(fullId, {
 			personProperties: {
 				created_at_timestamp: user.createdAt.getTime().toString(),
+				instance_id: instanceId,
+				version_cli: N8N_VERSION,
 			},
 			...(instanceId && { groups: { [POSTHOG_GROUP_TYPE_INSTANCE]: instanceId } }),
 		});