diff --git a/notes/host-context-implementation-checklist.md b/notes/host-context-implementation-checklist.md
index 87f87b7f0bb..61ea1abd1bf 100644
--- a/notes/host-context-implementation-checklist.md
+++ b/notes/host-context-implementation-checklist.md
@@ -268,3 +268,4 @@ Done means: reviewers and future agents can understand the vision, implementatio
 - [x] 2026-06-12: Completed Tasks account/host metadata by showing repo-backed account labels in source summaries when GitHub/GitLab accounts differ by Host, while preserving host labels, provider identities, Linear workspace names, Jira site names, and unavailable-host status in labels/titles. Verified with source-summary and repo picker tests, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-12: Continued the automation project-id migration by changing CLI automation show output to foreground explicit `runContext` fields (`runProjectId`, `runHostId`, `projectHostSetupId`, `runRepoId`, `runPath`) and label the old repo id as `legacyRepoId`. The checklist row remains partial because the shared `Automation.projectId` compatibility field still exists. Verified with CLI format/index tests, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-12: Aligned Automations manual-run disabled states with the backend run-target resolver so saved run contexts now disable Run Now when the project-host setup is missing or not ready, instead of failing after dispatch. Verified with focused automation availability tests, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
+- [x] 2026-06-12: Routed GitHub drawer label/assignee/reviewer metadata reads through the same task source context as issue/PR mutations, including slug-addressed Project view rows and reviewer request/remove actions, so same-repo multi-host drawers do not fall back to the repo owner or focused runtime. Verified with a focused source-boundary test, targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
diff --git a/src/renderer/src/components/GitHubItemDialog.tsx b/src/renderer/src/components/GitHubItemDialog.tsx
index 3c619723294..c5773669e44 100644
--- a/src/renderer/src/components/GitHubItemDialog.tsx
+++ b/src/renderer/src/components/GitHubItemDialog.tsx
@@ -167,7 +167,10 @@ import type {
   PRCheckDetail,
   PRComment
 } from '../../../shared/types'
-import type { TaskSourceContext } from '../../../shared/task-source-context'
+import {
+  getTaskSourceRuntimeSettings,
+  type TaskSourceContext
+} from '../../../shared/task-source-context'
 import { PER_REPO_FETCH_LIMIT } from '../../../shared/work-items'
 import { translate } from '@/i18n/i18n'
 import { getSettingsForRepoRuntimeOwner } from '@/lib/repo-runtime-owner'
@@ -456,10 +459,19 @@ function PRReviewersPanel({
     reviewRequests: item.reviewRequests
   }))
   const patchWorkItem = useAppStore((s) => s.patchWorkItem)
-  const settings = useAppStore((s) => s.settings)
   const repoOwnerSettings = useAppStore(
     useShallow((s) => getSettingsForRepoRuntimeOwner(s, item.repoId ?? null))
   )
+  const sourceSettings = useMemo(
+    () =>
+      sourceContext?.provider === 'github'
+        ? ({
+            ...repoOwnerSettings,
+            ...getTaskSourceRuntimeSettings(sourceContext)
+          } as typeof repoOwnerSettings)
+        : repoOwnerSettings,
+    [repoOwnerSettings, sourceContext]
+  )
   const reviewerInputRef = useRef<HTMLInputElement | null>(null)
   const reviewerInputFocusFrameRef = useRef<number | null>(null)
   const reviewerPanelMountedRef = useRef(true)
@@ -534,11 +546,12 @@ function PRReviewersPanel({
     open && reviewSlug ? reviewSlug.owner : null,
     open && reviewSlug ? reviewSlug.repo : null,
     reviewerSeedUsers.map((user) => user.login),
-    settings
+    sourceSettings
   )
   const reviewerMetadataByPath = useRepoAssignees(
     open && !reviewSlug ? repoPath : null,
-    open && !reviewSlug ? item.repoId : null
+    open && !reviewSlug ? item.repoId : null,
+    sourceSettings
   )
   const reviewerMetadata = reviewSlug ? reviewerMetadataBySlug : reviewerMetadataByPath
   const displayItem = { ...item, reviewRequests: localReviewRequests }
@@ -638,7 +651,7 @@ function PRReviewersPanel({
     item.reviewRequests !== undefined ||
     item.latestReviews !== undefined
   const canRequestReview =
-    !!repoPath || getActiveRuntimeTarget(repoOwnerSettings).kind === 'environment'
+    !!repoPath || getActiveRuntimeTarget(sourceSettings).kind === 'environment'
 
   const measureReviewerPickerPlacement = useCallback(() => {
     const rect = reviewerInputRef.current?.getBoundingClientRect()
@@ -681,7 +694,7 @@ function PRReviewersPanel({
       )
       return
     }
-    const target = getActiveRuntimeTarget(repoOwnerSettings)
+    const target = getActiveRuntimeTarget(sourceSettings)
     if (target.kind !== 'environment' && !repoPath) {
       toast.error(
         translate(
@@ -759,7 +772,7 @@ function PRReviewersPanel({
     if (logins.length === 0) {
       return
     }
-    const target = getActiveRuntimeTarget(repoOwnerSettings)
+    const target = getActiveRuntimeTarget(sourceSettings)
     if (target.kind !== 'environment' && !repoPath) {
       toast.error(
         translate(
@@ -4545,6 +4558,19 @@ function GHEditSection({
   const assigneesItemKey = `${item.repoId}\0${item.id}`
   const patchWorkItem = useAppStore((s) => s.patchWorkItem)
   const patchProjectRowContent = useAppStore((s) => s.patchProjectRowContent)
+  const repoOwnerSettings = useAppStore(
+    useShallow((s) => getSettingsForRepoRuntimeOwner(s, item.repoId ?? null))
+  )
+  const sourceSettings = useMemo(
+    () =>
+      sourceContext?.provider === 'github'
+        ? ({
+            ...repoOwnerSettings,
+            ...getTaskSourceRuntimeSettings(sourceContext)
+          } as typeof repoOwnerSettings)
+        : repoOwnerSettings,
+    [repoOwnerSettings, sourceContext]
+  )
   const { isPending, run } = useImmediateMutation()
   // Why: when the dialog opens from a Project view, mutations route through
   // *BySlug IPCs and we must keep `projectViewCache` in sync alongside
@@ -4568,16 +4594,18 @@ function GHEditSection({
   const slugRepo = projectOrigin?.repo ?? null
   const repoLabelsByPath = useRepoLabels(
     projectOrigin ? null : repoPath,
-    projectOrigin ? null : repoId
+    projectOrigin ? null : repoId,
+    sourceSettings
   )
-  const repoLabelsBySlug = useRepoLabelsBySlug(slugOwner, slugRepo)
+  const repoLabelsBySlug = useRepoLabelsBySlug(slugOwner, slugRepo, sourceSettings)
   const repoLabels = projectOrigin ? repoLabelsBySlug : repoLabelsByPath
   const repositoryLabelsUrl = useMemo(() => getGitHubRepositoryLabelsUrl(item.url), [item.url])
   const repoAssigneesByPath = useRepoAssignees(
     projectOrigin ? null : repoPath,
-    projectOrigin ? null : repoId
+    projectOrigin ? null : repoId,
+    sourceSettings
   )
-  const repoAssigneesBySlug = useRepoAssigneesBySlug(slugOwner, slugRepo, assignees)
+  const repoAssigneesBySlug = useRepoAssigneesBySlug(slugOwner, slugRepo, assignees, sourceSettings)
   const repoAssignees = projectOrigin ? repoAssigneesBySlug : repoAssigneesByPath
   const hasAttachedWorkspace =
     attachedWorkspaceLabel !== null && attachedWorkspaceLabel !== undefined
diff --git a/src/renderer/src/components/github-item-dialog-source-boundary.test.ts b/src/renderer/src/components/github-item-dialog-source-boundary.test.ts
new file mode 100644
index 00000000000..1e70364f09c
--- /dev/null
+++ b/src/renderer/src/components/github-item-dialog-source-boundary.test.ts
@@ -0,0 +1,43 @@
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { describe, expect, it } from 'vitest'
+
+const COMPONENT_ROOT = __dirname
+
+function componentSource(relativePath: string): string {
+  return readFileSync(join(COMPONENT_ROOT, relativePath), 'utf8')
+}
+
+function sourceBetween(source: string, startPattern: string, endPattern: string): string {
+  const start = source.indexOf(startPattern)
+  expect(start).toBeGreaterThanOrEqual(0)
+  const end = source.indexOf(endPattern, start + startPattern.length)
+  expect(end).toBeGreaterThan(start)
+  return source.slice(start, end)
+}
+
+describe('GitHubItemDialog source host boundaries', () => {
+  it('routes reviewer metadata and reviewer mutations through the task source context', () => {
+    const source = componentSource('GitHubItemDialog.tsx')
+    const section = sourceBetween(source, 'function PRReviewersPanel', 'function isPRFileViewed')
+
+    expect(section).toContain('getTaskSourceRuntimeSettings(sourceContext)')
+    expect(section).toContain('useRepoAssigneesBySlug(')
+    expect(section).toContain('sourceSettings')
+    expect(section).toContain('useRepoAssignees(')
+    expect(section).toContain('sourceSettings')
+    expect(section).toContain('getActiveRuntimeTarget(sourceSettings)')
+  })
+
+  it('routes edit metadata through the same task source as issue mutations', () => {
+    const source = componentSource('GitHubItemDialog.tsx')
+    const section = sourceBetween(source, 'function GHEditSection', 'const hasAttachedWorkspace')
+
+    expect(section).toContain('getTaskSourceRuntimeSettings(sourceContext)')
+    expect(section).toContain('useRepoLabels(')
+    expect(section).toContain('useRepoLabelsBySlug(slugOwner, slugRepo, sourceSettings)')
+    expect(section).toContain('useRepoAssignees(')
+    expect(section).toContain('useRepoAssigneesBySlug(')
+    expect(section).toContain('sourceSettings')
+  })
+})
diff --git a/src/renderer/src/hooks/useIssueMetadata.ts b/src/renderer/src/hooks/useIssueMetadata.ts
index 0ba6f1bd6d6..ea1e306ca13 100644
--- a/src/renderer/src/hooks/useIssueMetadata.ts
+++ b/src/renderer/src/hooks/useIssueMetadata.ts
@@ -31,6 +31,7 @@ type MetadataState<T> = {
 
 type GitHubMetadataOptions = {
   runtimeEnvironmentId?: string | null
+  activeRuntimeEnvironmentId?: string | null
 }
 
 // ─── GitHub ────────────────────────────────────────────────
@@ -54,7 +55,8 @@ export function useRepoLabels(
     if (!repoPath && !repoId) {
       return
     }
-    const runtimeEnvironmentId = options?.runtimeEnvironmentId?.trim() || null
+    const runtimeEnvironmentId =
+      options?.runtimeEnvironmentId?.trim() || options?.activeRuntimeEnvironmentId?.trim() || null
     const repoSelector = repoId ?? repoPath ?? ''
     // Why: SSH/runtime metadata must not reuse host-path cache entries; the same
     // repo id may resolve through a different credential/runtime boundary.
@@ -107,7 +109,7 @@ export function useRepoLabels(
           error: err instanceof Error ? err.message : 'Failed to load labels'
         }))
       })
-  }, [repoPath, repoId, options?.runtimeEnvironmentId])
+  }, [repoPath, repoId, options?.runtimeEnvironmentId, options?.activeRuntimeEnvironmentId])
 
   return state
 }
@@ -128,7 +130,8 @@ export function useRepoAssignees(
     if (!repoPath && !repoId) {
       return
     }
-    const runtimeEnvironmentId = options?.runtimeEnvironmentId?.trim() || null
+    const runtimeEnvironmentId =
+      options?.runtimeEnvironmentId?.trim() || options?.activeRuntimeEnvironmentId?.trim() || null
     const repoSelector = repoId ?? repoPath ?? ''
     // Why: SSH/runtime metadata must not reuse host-path cache entries; the same
     // repo id may resolve through a different credential/runtime boundary.
@@ -181,7 +184,7 @@ export function useRepoAssignees(
           error: err instanceof Error ? err.message : 'Failed to load assignees'
         }))
       })
-  }, [repoPath, repoId, options?.runtimeEnvironmentId])
+  }, [repoPath, repoId, options?.runtimeEnvironmentId, options?.activeRuntimeEnvironmentId])
 
   return state
 }