diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6cc1e627c2..bfa214eb1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@
 
 - **fix(security):** the mutable cloud-agent routes (`/api/cloud/credentials/update`, `/api/cloud/models/alias`) now require management auth instead of being treated as public. They were classified as public API routes, so a request without management credentials could update stored cloud-agent credentials and model aliases. They are removed from the public-route set, classified as management routes in the authz pipeline, and gated by `requireManagementAuth`; cloud **read**/auth routes stay public. Regression guards: `tests/unit/cloud-write-auth.test.ts`, `tests/unit/authz/classify.test.ts`, `tests/unit/public-api-routes.test.ts`. ([#6233](https://github.com/diegosouzapw/OmniRoute/pull/6233) — thanks @vittoroliveira-dev)
 
+- **refactor(dashboard):** extract the onboarding-wizard "Open provider details" link target into a pure, unit-tested `buildProviderDetailsHref(connection)` helper. The wizard already routes by `connection.id` (the node UUID) rather than the provider category slug (#6144/#6145); this hardens that behavior behind a tested helper that guards a missing id/connection. Regression guard: `tests/unit/provider-onboarding-href.test.ts`. ([#6166](https://github.com/diegosouzapw/OmniRoute/pull/6166) — thanks @KooshaPari)
+
 ---
 
 ## [3.8.43] — 2026-07-02
diff --git a/src/app/(dashboard)/dashboard/providers/components/onboarding/ProviderOnboardingWizard.tsx b/src/app/(dashboard)/dashboard/providers/components/onboarding/ProviderOnboardingWizard.tsx
index 65510ef0ce..4a44da1a89 100644
--- a/src/app/(dashboard)/dashboard/providers/components/onboarding/ProviderOnboardingWizard.tsx
+++ b/src/app/(dashboard)/dashboard/providers/components/onboarding/ProviderOnboardingWizard.tsx
@@ -22,6 +22,7 @@ import {
   getWizardOAuthProviderOptions,
   type WizardProviderOption,
 } from "./providerOnboardingCatalog";
+import { buildProviderDetailsHref } from "./providerOnboardingHref";
 import {
   createCompatibleProviderNode,
   createOnboardingConnection,
@@ -260,14 +261,19 @@ function ResultSummary({
         )}
 
         <div className="flex flex-wrap gap-2">
-          {connection?.id && (
-            <Link
-              href={`/dashboard/providers/${connection.id}`}
-              className="inline-flex items-center justify-center rounded-lg bg-primary px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-primary/90"
-            >
-              {providerText(t, "onboardingOpenProviderDetails", "Open provider details")}
-            </Link>
-          )}
+          {(() => {
+            const detailsHref = buildProviderDetailsHref(connection);
+            return (
+              detailsHref && (
+                <Link
+                  href={detailsHref}
+                  className="inline-flex items-center justify-center rounded-lg bg-primary px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-primary/90"
+                >
+                  {providerText(t, "onboardingOpenProviderDetails", "Open provider details")}
+                </Link>
+              )
+            );
+          })()}
           <Link
             href="/dashboard/providers"
             className="inline-flex items-center justify-center rounded-lg border border-border bg-bg-subtle px-4 py-2 text-sm font-medium text-text-main transition-colors hover:bg-bg-card"
diff --git a/src/app/(dashboard)/dashboard/providers/components/onboarding/providerOnboardingHref.ts b/src/app/(dashboard)/dashboard/providers/components/onboarding/providerOnboardingHref.ts
new file mode 100644
index 0000000000..46885cc35f
--- /dev/null
+++ b/src/app/(dashboard)/dashboard/providers/components/onboarding/providerOnboardingHref.ts
@@ -0,0 +1,33 @@
+import type { OnboardingConnection } from "./providerOnboardingApi";
+
+export interface OnboardingSummaryAction {
+  href: string | null;
+  label: string;
+}
+
+/**
+ * Minimum surface area required to compute the dashboard details href.
+ * Accepts either a full {@link OnboardingConnection} or any partial that
+ * exposes the server-assigned UUID under `id`.
+ */
+export type HrefConnection = Pick<OnboardingConnection, "id"> & {
+  provider?: string;
+};
+
+/**
+ * Build the "open provider details" link target for the onboarding wizard
+ * success card. The dashboard detail route is keyed by the connection's
+ * server-assigned UUID (`OnboardingConnection.id`), not by the provider
+ * category (`connection.provider` is e.g. "openai-compatible" and is shared
+ * across many connections).
+ *
+ * Returns `null` if no usable id is present so callers can hide the action
+ * entirely rather than linking to a 404.
+ */
+export function buildProviderDetailsHref(
+  connection: HrefConnection | null | undefined
+): string | null {
+  const id = connection?.id?.trim();
+  if (!id) return null;
+  return `/dashboard/providers/${encodeURIComponent(id)}`;
+}
\ No newline at end of file
diff --git a/tests/unit/provider-onboarding-href.test.ts b/tests/unit/provider-onboarding-href.test.ts
new file mode 100644
index 0000000000..95548d0cab
--- /dev/null
+++ b/tests/unit/provider-onboarding-href.test.ts
@@ -0,0 +1,37 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { buildProviderDetailsHref } from "../../src/app/(dashboard)/dashboard/providers/components/onboarding/providerOnboardingHref";
+
+test("buildProviderDetailsHref uses the server-assigned connection UUID", () => {
+  const href = buildProviderDetailsHref({
+    id: "9f3c1a4d-1c2b-4a3c-8def-0123456789ab",
+  });
+  assert.equal(
+    href,
+    "/dashboard/providers/9f3c1a4d-1c2b-4a3c-8def-0123456789ab"
+  );
+});
+
+test("buildProviderDetailsHref does not leak the provider category into the URL", () => {
+  // Regression for issue #6144: previously the wizard used
+  // `connection.provider` ("openai-compatible") as the URL slug, which 404'd
+  // on /dashboard/providers/[id] because that route is keyed by UUID.
+  const href = buildProviderDetailsHref({
+    id: "9f3c1a4d-1c2b-4a3c-8def-0123456789ab",
+    provider: "openai-compatible",
+  });
+  assert.notEqual(href, "/dashboard/providers/openai-compatible");
+  assert.match(href ?? "", /\/dashboard\/providers\/[0-9a-f-]+$/);
+});
+
+test("buildProviderDetailsHref returns null when no id is available", () => {
+  assert.equal(buildProviderDetailsHref(null), null);
+  assert.equal(buildProviderDetailsHref(undefined), null);
+  assert.equal(buildProviderDetailsHref({ id: "" }), null);
+  assert.equal(buildProviderDetailsHref({ id: "   " }), null);
+});
+
+test("buildProviderDetailsHref percent-encodes unusual ids", () => {
+  const href = buildProviderDetailsHref({ id: "abc/123 def" });
+  assert.equal(href, "/dashboard/providers/abc%2F123%20def");
+});
\ No newline at end of file