diff --git a/src/main/github/client.ts b/src/main/github/client.ts
index b4702f28128..31dbc519571 100644
--- a/src/main/github/client.ts
+++ b/src/main/github/client.ts
@@ -79,6 +79,7 @@ import {
   rememberGhCwdResolutionFailure
 } from './gh-cwd-repo-negative-cache'
 import type { GitHubRepoContext } from './github-repository-identity'
+import { getEnterpriseGitHubRepoSlug } from './github-enterprise-repository'
 export { _resetOwnerRepoCache } from './gh-utils'
 export {
   getIssue,
@@ -1844,11 +1845,11 @@ export async function createGitHubPullRequest(
     }
   }
 
-  const ownerRepo = await getOwnerRepo(
-    repoPath,
-    connectionId,
-    ...hostedReviewLocalGitOptionArgs(options)
-  )
+  // Why: github.com-only slug parsing returns null for GHES, so fall back to the
+  // enterprise resolver (gh-authenticated custom host) before giving up (#8312).
+  const ownerRepo =
+    (await getOwnerRepo(repoPath, connectionId, ...hostedReviewLocalGitOptionArgs(options))) ??
+    (await getEnterpriseGitHubRepoSlug(repoPath, connectionId, options))
   if (!ownerRepo) {
     return {
       ok: false,
diff --git a/src/main/github/github-enterprise-repository.test.ts b/src/main/github/github-enterprise-repository.test.ts
new file mode 100644
index 00000000000..cdc409f6322
--- /dev/null
+++ b/src/main/github/github-enterprise-repository.test.ts
@@ -0,0 +1,142 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+const { ghExecFileAsyncMock, gitExecFileAsyncMock } = vi.hoisted(() => ({
+  ghExecFileAsyncMock: vi.fn(),
+  gitExecFileAsyncMock: vi.fn()
+}))
+
+// Mock only the exec boundary so the real remote-identity parsing and
+// `gh auth status` parsing run against controlled command output.
+vi.mock('../git/runner', () => ({
+  ghExecFileAsync: ghExecFileAsyncMock,
+  gitExecFileAsync: gitExecFileAsyncMock
+}))
+
+import {
+  _resetAuthenticatedGitHubHostsCache,
+  getAuthenticatedGitHubHosts,
+  getEnterpriseGitHubRepoSlug
+} from './github-enterprise-repository'
+
+function mockOriginRemote(url: string): void {
+  gitExecFileAsyncMock.mockImplementation(async (args: string[]) => {
+    if (args[0] === 'remote' && args[1] === 'get-url') {
+      return { stdout: `${url}\n`, stderr: '' }
+    }
+    return { stdout: '', stderr: '' }
+  })
+}
+
+function mockGhAuthStatus(hosts: string[]): void {
+  const text = hosts
+    .map(
+      (host) =>
+        `${host}\n  ✓ Logged in to ${host} account kelora (keyring)\n  - Active account: true\n  - Token scopes: 'repo', 'read:org'`
+    )
+    .join('\n')
+  ghExecFileAsyncMock.mockResolvedValue({ stdout: text, stderr: '' })
+}
+
+describe('getEnterpriseGitHubRepoSlug', () => {
+  beforeEach(() => {
+    ghExecFileAsyncMock.mockReset()
+    gitExecFileAsyncMock.mockReset()
+    _resetAuthenticatedGitHubHostsCache()
+  })
+
+  it('resolves a GHES remote whose host the user is gh-authenticated to (#8312)', async () => {
+    mockOriginRemote('https://github.acme-corp.com/team/orca.git')
+    mockGhAuthStatus(['github.acme-corp.com'])
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toEqual({
+      owner: 'team',
+      repo: 'orca',
+      host: 'github.acme-corp.com'
+    })
+  })
+
+  it('resolves a GHES SCP-style SSH remote', async () => {
+    mockOriginRemote('git@github.acme-corp.com:team/orca.git')
+    mockGhAuthStatus(['github.acme-corp.com'])
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toEqual({
+      owner: 'team',
+      repo: 'orca',
+      host: 'github.acme-corp.com'
+    })
+  })
+
+  it('leaves github.com to getOwnerRepo without probing gh auth', async () => {
+    mockOriginRemote('https://github.com/team/orca.git')
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toBeNull()
+    expect(ghExecFileAsyncMock).not.toHaveBeenCalled()
+  })
+
+  it('declines a custom host the user is not gh-authenticated to (leaves it for Gitea)', async () => {
+    mockOriginRemote('https://gitea.example.com/team/orca.git')
+    mockGhAuthStatus(['github.com'])
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toBeNull()
+  })
+
+  it('returns null for an unparseable remote', async () => {
+    mockOriginRemote('not-a-remote-url')
+    mockGhAuthStatus(['github.acme-corp.com'])
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toBeNull()
+  })
+
+  it('returns null when the origin remote lookup fails', async () => {
+    gitExecFileAsyncMock.mockRejectedValue(new Error('no such remote'))
+
+    await expect(getEnterpriseGitHubRepoSlug('/repo')).resolves.toBeNull()
+  })
+})
+
+describe('getAuthenticatedGitHubHosts', () => {
+  beforeEach(() => {
+    ghExecFileAsyncMock.mockReset()
+    gitExecFileAsyncMock.mockReset()
+    _resetAuthenticatedGitHubHostsCache()
+  })
+
+  it('parses and lowercases the logged-in hosts', async () => {
+    mockGhAuthStatus(['github.com', 'GitHub.Acme-Corp.com'])
+
+    const hosts = await getAuthenticatedGitHubHosts()
+    expect(hosts.has('github.com')).toBe(true)
+    expect(hosts.has('github.acme-corp.com')).toBe(true)
+  })
+
+  it('caches a non-empty result to avoid re-spawning gh per detection poll', async () => {
+    mockGhAuthStatus(['github.acme-corp.com'])
+
+    await getAuthenticatedGitHubHosts()
+    await getAuthenticatedGitHubHosts()
+    expect(ghExecFileAsyncMock).toHaveBeenCalledTimes(1)
+  })
+
+  it('recovers hosts from gh output even when gh exits non-zero', async () => {
+    ghExecFileAsyncMock.mockRejectedValue(
+      Object.assign(new Error('exit 1'), {
+        stdout:
+          'github.acme-corp.com\n  ✓ Logged in to github.acme-corp.com account kelora (keyring)',
+        stderr: ''
+      })
+    )
+
+    const hosts = await getAuthenticatedGitHubHosts()
+    expect(hosts.has('github.acme-corp.com')).toBe(true)
+  })
+
+  it('does not cache an empty result so a later gh login is discovered', async () => {
+    ghExecFileAsyncMock.mockRejectedValueOnce(
+      Object.assign(new Error('not installed'), { stdout: '', stderr: '' })
+    )
+    expect((await getAuthenticatedGitHubHosts()).size).toBe(0)
+
+    mockGhAuthStatus(['github.acme-corp.com'])
+    expect((await getAuthenticatedGitHubHosts()).has('github.acme-corp.com')).toBe(true)
+  })
+})
diff --git a/src/main/github/github-enterprise-repository.ts b/src/main/github/github-enterprise-repository.ts
new file mode 100644
index 00000000000..8542343ef0e
--- /dev/null
+++ b/src/main/github/github-enterprise-repository.ts
@@ -0,0 +1,103 @@
+import { ghExecFileAsync } from '../git/runner'
+import type { GitHubOwnerRepo } from '../../shared/types'
+import {
+  getHostedReviewLocalGitOptions,
+  type HostedReviewExecutionOptions
+} from '../source-control/hosted-review-git-options'
+import { parseAuthStatus } from './auth-diagnose'
+import {
+  getRemoteUrlForRepo,
+  githubRepoContext,
+  parseGitHubRemoteIdentity
+} from './github-repository-identity'
+
+export type GitHubEnterpriseRepoSlug = GitHubOwnerRepo & { host: string }
+
+// Why: `gh` only ever manages github.com / GitHub Enterprise credentials, so a
+// host that `gh auth status` reports as logged-in is definitively a GitHub host.
+// This is the same signal `glab auth status` provides for GitLab self-hosted
+// detection, mirrored here so GHES is not left to fall through to Gitea (#8312).
+const AUTHENTICATED_HOSTS_TTL_MS = 60_000
+
+type AuthenticatedHostsCacheEntry = {
+  hosts: ReadonlySet<string>
+  expiresAt: number
+}
+
+const authenticatedHostsCache = new Map<string, AuthenticatedHostsCacheEntry>()
+
+function connectionCacheKey(connectionId?: string | null): string {
+  return connectionId ?? 'local'
+}
+
+/** @internal - exposed for tests only */
+export function _resetAuthenticatedGitHubHostsCache(): void {
+  authenticatedHostsCache.clear()
+}
+
+/**
+ * Hosts the local `gh` CLI is authenticated to, lowercased. Cached briefly so a
+ * `gh auth login --hostname <ghes>` performed after startup is picked up without
+ * spawning `gh auth status` on every provider-detection poll. Failures are not
+ * cached so a later probe (gh installed, tunnel ready) can still discover hosts.
+ */
+export async function getAuthenticatedGitHubHosts(
+  connectionId?: string | null
+): Promise<ReadonlySet<string>> {
+  const key = connectionCacheKey(connectionId)
+  const now = Date.now()
+  const cached = authenticatedHostsCache.get(key)
+  if (cached && cached.expiresAt > now) {
+    return cached.hosts
+  }
+  let text = ''
+  try {
+    // Why: `gh auth status` reads gh's own config, so it is host-scoped rather
+    // than cwd-scoped — no repo context is needed to enumerate logged-in hosts.
+    const { stdout, stderr } = await ghExecFileAsync(['auth', 'status'])
+    text = `${stdout}\n${stderr}`
+  } catch (err) {
+    // gh exits non-zero when any host has a token problem but still prints the
+    // per-host status we parse; recover its output before giving up.
+    const execErr = err as { stdout?: unknown; stderr?: unknown }
+    text = `${String(execErr?.stdout ?? '')}\n${String(execErr?.stderr ?? '')}`.trim()
+    if (!text) {
+      return new Set()
+    }
+  }
+  const hosts = new Set(parseAuthStatus(text).map((account) => account.host.toLowerCase()))
+  if (hosts.size === 0) {
+    return hosts
+  }
+  authenticatedHostsCache.set(key, { hosts, expiresAt: now + AUTHENTICATED_HOSTS_TTL_MS })
+  return hosts
+}
+
+/**
+ * Resolve owner/repo for a GitHub Enterprise Server `origin` remote — a custom
+ * host the user is gh-authenticated to. Returns null for github.com (already
+ * handled by {@link getOwnerRepo}) and for hosts gh is not logged in to
+ * (Gitea/Forgejo/self-hosted GitLab/etc.), so GHES routes to the GitHub provider
+ * without a GitHub provider stealing another forge's remote.
+ */
+export async function getEnterpriseGitHubRepoSlug(
+  repoPath: string,
+  connectionId?: string | null,
+  options: HostedReviewExecutionOptions = {}
+): Promise<GitHubEnterpriseRepoSlug | null> {
+  const context = githubRepoContext(repoPath, connectionId, getHostedReviewLocalGitOptions(options))
+  let remoteUrl: string | null
+  try {
+    remoteUrl = await getRemoteUrlForRepo(context, 'origin')
+  } catch {
+    return null
+  }
+  const identity = remoteUrl ? parseGitHubRemoteIdentity(remoteUrl) : null
+  if (!identity || identity.host === 'github.com') {
+    return null
+  }
+  const authenticatedHosts = await getAuthenticatedGitHubHosts(connectionId)
+  return authenticatedHosts.has(identity.host)
+    ? { owner: identity.owner, repo: identity.repo, host: identity.host }
+    : null
+}
diff --git a/src/main/source-control/forge-provider.test.ts b/src/main/source-control/forge-provider.test.ts
index 0317d6fc9e9..95c5c9d2676 100644
--- a/src/main/source-control/forge-provider.test.ts
+++ b/src/main/source-control/forge-provider.test.ts
@@ -11,7 +11,8 @@ const {
   getMergeRequestForBranchMock,
   getProjectSlugMock,
   getPRForBranchOutcomeMock,
-  getRepoSlugMock
+  getRepoSlugMock,
+  getEnterpriseGitHubRepoSlugMock
 } = vi.hoisted(() => ({
   createGitHubPullRequestMock: vi.fn(),
   createGitLabMergeRequestMock: vi.fn(),
@@ -23,7 +24,8 @@ const {
   getMergeRequestForBranchMock: vi.fn(),
   getProjectSlugMock: vi.fn(),
   getPRForBranchOutcomeMock: vi.fn(),
-  getRepoSlugMock: vi.fn()
+  getRepoSlugMock: vi.fn(),
+  getEnterpriseGitHubRepoSlugMock: vi.fn()
 }))
 
 vi.mock('../gitlab/client', () => ({
@@ -42,6 +44,10 @@ vi.mock('../github/client', () => ({
   getPRForBranchOutcome: getPRForBranchOutcomeMock
 }))
 
+vi.mock('../github/github-enterprise-repository', () => ({
+  getEnterpriseGitHubRepoSlug: getEnterpriseGitHubRepoSlugMock
+}))
+
 vi.mock('../bitbucket/client', () => ({
   getBitbucketRepoSlug: getBitbucketRepoSlugMock,
   getBitbucketPullRequestForBranch: vi.fn(),
@@ -88,6 +94,7 @@ describe('forge provider interface', () => {
     getProjectSlugMock.mockReset()
     getPRForBranchOutcomeMock.mockReset()
     getRepoSlugMock.mockReset()
+    getEnterpriseGitHubRepoSlugMock.mockReset()
   })
 
   it('preserves the existing hosted provider detection order', async () => {
@@ -101,6 +108,45 @@ describe('forge provider interface', () => {
     expect(getRepoSlugMock).not.toHaveBeenCalled()
   })
 
+  it('detects a GitHub Enterprise Server remote as the GitHub provider, not Gitea', async () => {
+    // Regression for #8312: a GHES host is not github.com, so github.com-only
+    // slug parsing returns null. Detection must claim it via the enterprise
+    // resolver instead of falling through to Gitea's demand for ORCA_GITEA_TOKEN.
+    getProjectSlugMock.mockResolvedValue(null)
+    getRepoSlugMock.mockResolvedValue(null)
+    getEnterpriseGitHubRepoSlugMock.mockResolvedValue({
+      owner: 'team',
+      repo: 'orca',
+      host: 'github.acme-corp.com'
+    })
+
+    await expect(detectHostedReviewProvider({ repoPath: '/repo' })).resolves.toBe('github')
+    await expect(getForgeProviderForRepository({ repoPath: '/repo' })).resolves.toMatchObject({
+      id: 'github'
+    })
+    // Gitea must never be consulted once GitHub claims the enterprise host.
+    expect(getGiteaRepoSlugMock).not.toHaveBeenCalled()
+  })
+
+  it('leaves a genuinely non-GitHub remote for later providers when gh is not authenticated', async () => {
+    getProjectSlugMock.mockResolvedValue(null)
+    getRepoSlugMock.mockResolvedValue(null)
+    // gh is not logged in to this host, so the enterprise resolver declines and
+    // the Gitea provider is free to claim its own self-hosted remote.
+    getEnterpriseGitHubRepoSlugMock.mockResolvedValue(null)
+    getBitbucketRepoSlugMock.mockResolvedValue(null)
+    getAzureDevOpsRepoSlugMock.mockResolvedValue(null)
+    getGiteaRepoSlugMock.mockResolvedValue({
+      host: 'gitea.example.com',
+      owner: 'team',
+      repo: 'orca',
+      apiBaseUrl: 'https://gitea.example.com/api/v1',
+      webBaseUrl: 'https://gitea.example.com'
+    })
+
+    await expect(detectHostedReviewProvider({ repoPath: '/repo' })).resolves.toBe('gitea')
+  })
+
   it('keeps review creation capability scoped to providers with creation support', async () => {
     expect(
       FORGE_PROVIDERS.map((provider) => [provider.id, provider.supportsReviewCreation])
diff --git a/src/main/source-control/forge-provider.ts b/src/main/source-control/forge-provider.ts
index d87efe9dcf1..a7d22ad48ae 100644
--- a/src/main/source-control/forge-provider.ts
+++ b/src/main/source-control/forge-provider.ts
@@ -22,6 +22,7 @@ import {
 } from '../gitea/client'
 import { createGiteaPullRequest } from '../gitea/pull-request-creation'
 import { createGitHubPullRequest, getPRForBranchOutcome, getRepoSlug } from '../github/client'
+import { getEnterpriseGitHubRepoSlug } from '../github/github-enterprise-repository'
 import { getMergeRequest, getMergeRequestForBranch, getProjectSlug } from '../gitlab/client'
 import { createGitLabMergeRequest } from '../gitlab/merge-request-creation'
 import {
@@ -122,8 +123,25 @@ function unwrapGitHubPRForBranchOutcome(
 const gitHubForgeProvider = {
   id: 'github',
   supportsReviewCreation: true,
-  resolveRepository: (context) =>
-    getRepoSlug(context.repoPath, context.connectionId, ...hostedReviewExecutionArgs(context)),
+  resolveRepository: async (context) => {
+    const slug = await getRepoSlug(
+      context.repoPath,
+      context.connectionId,
+      ...hostedReviewExecutionArgs(context)
+    )
+    if (slug) {
+      return slug
+    }
+    // Why: GHES remotes live on a custom host, so github.com-only slug parsing
+    // misses them and detection would otherwise fall through to Gitea (#8312).
+    // Claim the repo when gh is authenticated to its host — the same signal
+    // GitLab uses for self-hosted instances.
+    return getEnterpriseGitHubRepoSlug(
+      context.repoPath,
+      context.connectionId,
+      ...hostedReviewExecutionArgs(context)
+    )
+  },
   async getReviewForBranch(input) {
     const fallbackReviewNumber =
       input.linkedReviewNumber == null ? (input.fallbackReviewNumber ?? null) : null
diff --git a/src/main/source-control/hosted-review-creation.test.ts b/src/main/source-control/hosted-review-creation.test.ts
index c03447d4043..7af904748dc 100644
--- a/src/main/source-control/hosted-review-creation.test.ts
+++ b/src/main/source-control/hosted-review-creation.test.ts
@@ -17,7 +17,8 @@ const {
   glabExecFileAsyncMock,
   gitExecFileAsyncMock,
   getUpstreamStatusMock,
-  getSshGitProviderMock
+  getSshGitProviderMock,
+  getEnterpriseGitHubRepoSlugMock
 } = vi.hoisted(() => ({
   createGitHubPullRequestMock: vi.fn(),
   createGitLabMergeRequestMock: vi.fn(),
@@ -35,7 +36,8 @@ const {
   glabExecFileAsyncMock: vi.fn(),
   gitExecFileAsyncMock: vi.fn(),
   getUpstreamStatusMock: vi.fn(),
-  getSshGitProviderMock: vi.fn()
+  getSshGitProviderMock: vi.fn(),
+  getEnterpriseGitHubRepoSlugMock: vi.fn()
 }))
 
 vi.mock('../github/client', () => ({
@@ -44,6 +46,10 @@ vi.mock('../github/client', () => ({
   getPRForBranch: vi.fn()
 }))
 
+vi.mock('../github/github-enterprise-repository', () => ({
+  getEnterpriseGitHubRepoSlug: getEnterpriseGitHubRepoSlugMock
+}))
+
 vi.mock('../gitlab/client', () => ({
   getProjectSlug: getProjectSlugMock,
   getMergeRequestForBranch: vi.fn(),
@@ -129,7 +135,8 @@ function resetMocks(): void {
     glabExecFileAsyncMock,
     gitExecFileAsyncMock,
     getUpstreamStatusMock,
-    getSshGitProviderMock
+    getSshGitProviderMock,
+    getEnterpriseGitHubRepoSlugMock
   ]) {
     mock.mockReset()
   }
@@ -141,6 +148,22 @@ function mockGitHubProvider(): void {
   getBitbucketRepoSlugMock.mockResolvedValue(null)
   getAzureDevOpsRepoSlugMock.mockResolvedValue(null)
   getGiteaRepoSlugMock.mockResolvedValue(null)
+  getEnterpriseGitHubRepoSlugMock.mockResolvedValue(null)
+}
+
+// GHES: github.com-only slug parsing misses the custom host, so the enterprise
+// resolver claims the repo and reports the host for the gh auth probe (#8312).
+function mockGitHubEnterpriseProvider(): void {
+  getProjectSlugMock.mockResolvedValue(null)
+  getRepoSlugMock.mockResolvedValue(null)
+  getBitbucketRepoSlugMock.mockResolvedValue(null)
+  getAzureDevOpsRepoSlugMock.mockResolvedValue(null)
+  getGiteaRepoSlugMock.mockResolvedValue(null)
+  getEnterpriseGitHubRepoSlugMock.mockResolvedValue({
+    owner: 'acme',
+    repo: 'orca',
+    host: 'github.acme-corp.com'
+  })
 }
 
 function mockGitLabProvider(): void {
@@ -349,6 +372,31 @@ describe('createHostedReview', () => {
     )
   })
 
+  it('creates a pull request on a GitHub Enterprise Server remote (#8312)', async () => {
+    mockGitHubEnterpriseProvider()
+
+    await expect(
+      createHostedReview('/repo', {
+        provider: 'github',
+        base: 'main',
+        head: 'feature',
+        title: 'Feature'
+      })
+    ).resolves.toEqual({
+      ok: true,
+      number: 12,
+      url: 'https://github.com/acme/orca/pull/12'
+    })
+
+    // The auth probe must target the GHES host, not the hardcoded github.com.
+    expect(ghExecFileAsyncMock).toHaveBeenCalledWith(
+      ['auth', 'status', '--hostname', 'github.acme-corp.com'],
+      { cwd: '/repo' }
+    )
+    expect(createGitHubPullRequestMock).toHaveBeenCalled()
+    expect(createGiteaPullRequestMock).not.toHaveBeenCalled()
+  })
+
   it('creates a GitLab merge request after fresh main-process validation passes', async () => {
     mockGitLabProvider()
 
@@ -636,6 +684,33 @@ describe('getHostedReviewCreationEligibility', () => {
     })
   })
 
+  it('detects a GitHub Enterprise Server branch as the GitHub provider (#8312)', async () => {
+    mockGitHubEnterpriseProvider()
+
+    await expect(
+      getHostedReviewCreationEligibility({
+        repoPath: '/repo',
+        branch: 'feature/create-pr',
+        base: 'origin/main',
+        hasUncommittedChanges: false,
+        hasUpstream: true,
+        ahead: 0,
+        behind: 0
+      })
+    ).resolves.toMatchObject({
+      provider: 'github',
+      canCreate: true,
+      blockedReason: null,
+      nextAction: null
+    })
+
+    // The auth gate must probe the GHES host, not the hardcoded github.com.
+    expect(ghExecFileAsyncMock).toHaveBeenCalledWith(
+      ['auth', 'status', '--hostname', 'github.acme-corp.com'],
+      { cwd: '/repo' }
+    )
+  })
+
   it('resolves remote eligibility through SSH repo metadata without generating PR copy', async () => {
     const remoteGit = {
       exec: vi.fn(async () => ({ stdout: '', stderr: '' }))
diff --git a/src/main/source-control/hosted-review-creation.ts b/src/main/source-control/hosted-review-creation.ts
index 7b6709d2dd3..0b0f8f9cb13 100644
--- a/src/main/source-control/hosted-review-creation.ts
+++ b/src/main/source-control/hosted-review-creation.ts
@@ -18,6 +18,7 @@ import {
 } from '../../shared/hosted-review-creation-providers'
 import { isAzureDevOpsReviewCreationAuthenticated } from '../azure-devops/pull-request-creation'
 import { isGiteaReviewCreationAuthenticated } from '../gitea/pull-request-creation'
+import { getEnterpriseGitHubRepoSlug } from '../github/github-enterprise-repository'
 import { acquire, ghExecFileAsync, gitExecFileAsync, release } from '../github/gh-utils'
 import { isNoUpstreamError, normalizeGitErrorMessage } from '../../shared/git-remote-error'
 import type { GitUpstreamStatus } from '../../shared/types'
@@ -59,10 +60,15 @@ async function isGitHubAuthenticated(
   connectionId?: string | null,
   options: HostedReviewExecutionOptions = {}
 ): Promise<boolean> {
+  // Why: a GHES repo authenticates against its own custom host, so a hardcoded
+  // github.com probe reports "not authenticated" for Enterprise users (#8312).
+  // Resolve the repo's actual GitHub host, defaulting to github.com.
+  const enterprise = await getEnterpriseGitHubRepoSlug(repoPath, connectionId, options)
+  const hostname = enterprise?.host ?? 'github.com'
   await acquire()
   try {
     await ghExecFileAsync(
-      ['auth', 'status', '--hostname', 'github.com'],
+      ['auth', 'status', '--hostname', hostname],
       connectionId ? {} : { cwd: repoPath, ...getHostedReviewLocalGitOptions(options) }
     )
     return true