diff --git a/notes/host-context-implementation-checklist.md b/notes/host-context-implementation-checklist.md
index 936194da5fa..0bfa91176be 100644
--- a/notes/host-context-implementation-checklist.md
+++ b/notes/host-context-implementation-checklist.md
@@ -49,7 +49,7 @@ Done means: if Machine A and Machine B have different provider accounts, every l
 - [~] Show enough account/host metadata to make mismatched GitHub/GitLab/Linear/Jira accounts understandable.
 - [~] Persist task source context in task drawer URLs/state so refresh, deep links, and reopen preserve the same source.
 - [x] Ensure task drawer actions reuse the drawer item source context, not a global provider default.
-- [~] Add disabled/auth-needed/disconnected states for source hosts.
+- [x] Add disabled/auth-needed/disconnected states for source hosts.
 - [x] Add empty states explaining when a project has no configured task source on the selected host.
 
 Done means: users can tell where Tasks are being fetched from, and changing execution host does not silently change provider data.
@@ -245,3 +245,4 @@ Done means: reviewers and future agents can understand the vision, implementatio
 - [x] 2026-06-12: Continued the Host copy audit through onboarding, remote folder-add, attachment import, Settings SSH copy, and remote file browser catalog text; extracted `RepoStepNestedImportPanel` to keep the touched onboarding component under max-lines, and verified with stale-copy scans, focused onboarding/repos tests, focused oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-12: Preserved explicit automation run-host context in CLI project selectors: `orca automations create/edit --project/--host` and `--project-host-setup` now send `WorkspaceRunContext` alongside the legacy repo selector, so scheduled runs retain logical project, host, setup, repo, and path identity. Verified with focused CLI regressions (108 tests), targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
 - [x] 2026-06-12: Added an advanced automation CLI source selector via `--source-context <json|null>` for create/edit, normalizing the shared `TaskSourceContext` shape before RPC and allowing edit callers to clear the source context with `null`; verified with focused CLI regressions (111 tests), targeted oxlint, full `pnpm run typecheck`, and `git diff --check`.
+- [x] 2026-06-12: Added a reusable Tasks source availability notice and wired unavailable source-host/account states into the Tasks source chrome, so disconnected/auth-needed/blocked hosts show an inline status, fully unavailable sources disable their icon, and partial multi-host failures remain selectable with warning copy; verified with focused source-summary tests, targeted oxlint, and full `pnpm run typecheck`.
diff --git a/src/renderer/src/components/TaskPage.tsx b/src/renderer/src/components/TaskPage.tsx
index e96ec9d06d5..c88d61a8f0e 100644
--- a/src/renderer/src/components/TaskPage.tsx
+++ b/src/renderer/src/components/TaskPage.tsx
@@ -90,8 +90,14 @@ import IssueSourceIndicator, { sameGitHubOwnerRepo } from '@/components/github/I
 import IssueSourceSelector, { issueSourceChipClass } from '@/components/github/IssueSourceSelector'
 import { LinearPriorityIcon } from '@/components/linear-priority-icon'
 import { reconcileLinearTeamSelection } from '@/components/task-page-linear-team-selection'
-import { getTaskSourceContextSummary } from './task-source-context-summary'
-import type { TaskSourceHostAvailability } from './task-source-context-summary'
+import {
+  getTaskSourceAvailabilityNotice,
+  getTaskSourceContextSummary
+} from './task-source-context-summary'
+import type {
+  TaskSourceAvailabilityNotice,
+  TaskSourceHostAvailability
+} from './task-source-context-summary'
 import { useConfirmationDialog } from '@/components/confirmation-dialog'
 import {
   getGitHubPRPrimaryReviewer,
@@ -2968,6 +2974,67 @@ export default function TaskPage(): React.JSX.Element {
       }
     ]
   }, [accountBackedTaskSourceHostId, hostRegistryById, taskSource])
+  const taskSourceAvailabilityNoticeByProvider = useMemo<
+    Partial<Record<TaskProvider, TaskSourceAvailabilityNotice>>
+  >(() => {
+    const availabilityForContexts = (
+      contexts: readonly TaskSourceContext[]
+    ): TaskSourceHostAvailability[] =>
+      contexts.flatMap((context) => {
+        const host = hostRegistryById.get(context.hostId)
+        if (!host || host.health === 'local' || host.health === 'available') {
+          return []
+        }
+        return [{ hostId: context.hostId, health: host.health, status: host.connectionStatus }]
+      })
+    const accountHost = hostRegistryById.get(accountBackedTaskSourceHostId)
+    const accountAvailability =
+      !accountHost || accountHost.health === 'local' || accountHost.health === 'available'
+        ? []
+        : [
+            {
+              hostId: accountHost.id,
+              health: accountHost.health,
+              status: accountHost.connectionStatus
+            }
+          ]
+    const labelFor = (provider: TaskProvider): string =>
+      sourceOptions.find((source) => source.id === provider)?.label ?? provider
+    return {
+      github:
+        getTaskSourceAvailabilityNotice({
+          providerLabel: labelFor('github'),
+          sourceCount: selectedRepos.length,
+          hostAvailability: availabilityForContexts(
+            selectedRepos
+              .map((repo) => getTaskPageRepoSourceContext(repo, 'github'))
+              .filter((context): context is TaskSourceContext => context !== null)
+          )
+        }) ?? undefined,
+      gitlab:
+        getTaskSourceAvailabilityNotice({
+          providerLabel: labelFor('gitlab'),
+          sourceCount: selectedRepos.length,
+          hostAvailability: availabilityForContexts(
+            selectedRepos
+              .map((repo) => getTaskPageRepoSourceContext(repo, 'gitlab'))
+              .filter((context): context is TaskSourceContext => context !== null)
+          )
+        }) ?? undefined,
+      linear:
+        getTaskSourceAvailabilityNotice({
+          providerLabel: labelFor('linear'),
+          sourceCount: 1,
+          hostAvailability: accountAvailability
+        }) ?? undefined,
+      jira:
+        getTaskSourceAvailabilityNotice({
+          providerLabel: labelFor('jira'),
+          sourceCount: 1,
+          hostAvailability: accountAvailability
+        }) ?? undefined
+    }
+  }, [accountBackedTaskSourceHostId, hostRegistryById, selectedRepos, sourceOptions])
   const taskSourceContextSummary = useMemo(() => {
     const providerLabel =
       sourceOptions.find((source) => source.id === taskSource)?.label ?? taskSource
@@ -2996,6 +3063,27 @@ export default function TaskPage(): React.JSX.Element {
     taskSourceHostAvailability,
     taskSourceRepoContexts
   ])
+  const taskSourceAvailabilityNotice = useMemo(() => {
+    const providerLabel =
+      sourceOptions.find((source) => source.id === taskSource)?.label ?? taskSource
+    return getTaskSourceAvailabilityNotice({
+      providerLabel,
+      sourceCount:
+        taskSource === 'linear' || taskSource === 'jira'
+          ? 1
+          : Math.max(1, taskSourceRepoContexts.length),
+      hostAvailability:
+        taskSource === 'linear' || taskSource === 'jira'
+          ? accountBackedTaskSourceHostAvailability
+          : taskSourceHostAvailability
+    })
+  }, [
+    accountBackedTaskSourceHostAvailability,
+    sourceOptions,
+    taskSource,
+    taskSourceHostAvailability,
+    taskSourceRepoContexts.length
+  ])
   const githubEmptyState = useMemo(
     () =>
       getRepoBackedTaskEmptyState({
@@ -7212,13 +7300,19 @@ export default function TaskPage(): React.JSX.Element {
                     <div className="mx-1 h-5 w-px bg-border/50" aria-hidden />
                     {visibleSourceOptions.map((source) => {
                       const active = taskSource === source.id
+                      const sourceAvailabilityNotice =
+                        taskSourceAvailabilityNoticeByProvider[source.id] ?? null
+                      const sourceDisabled = source.disabled || sourceAvailabilityNotice?.blocking
                       return (
                         <Tooltip key={source.id}>
                           <TooltipTrigger asChild>
                             <button
                               type="button"
-                              disabled={source.disabled}
+                              disabled={sourceDisabled}
                               onClick={() => {
+                                if (sourceAvailabilityNotice?.blocking) {
+                                  return
+                                }
                                 taskSourceManuallyChangedRef.current = true
                                 openTaskPage(
                                   { taskSource: source.id },
@@ -7233,20 +7327,20 @@ export default function TaskPage(): React.JSX.Element {
                                   )
                                 })
                               }}
-                              aria-label={source.label}
+                              aria-label={sourceAvailabilityNotice?.label ?? source.label}
                               className={cn(
                                 'group flex h-8 w-8 items-center justify-center rounded-md border transition',
                                 active
                                   ? 'border-foreground/40 bg-muted/70 text-foreground shadow-sm'
                                   : 'border-border/40 bg-transparent text-muted-foreground hover:bg-muted/40 hover:text-foreground',
-                                source.disabled && 'cursor-not-allowed opacity-55'
+                                sourceDisabled && 'cursor-not-allowed opacity-55'
                               )}
                             >
                               <source.Icon className="size-3.5" />
                             </button>
                           </TooltipTrigger>
                           <TooltipContent side="bottom" sideOffset={6}>
-                            {source.label}
+                            {sourceAvailabilityNotice?.label ?? source.label}
                           </TooltipContent>
                         </Tooltip>
                       )
@@ -7356,6 +7450,17 @@ export default function TaskPage(): React.JSX.Element {
                   ) : null}
                 </div>
 
+                {taskSourceAvailabilityNotice ? (
+                  <div
+                    role="status"
+                    className="flex max-w-3xl items-center gap-2 rounded-md border border-border/60 bg-muted/30 px-3 py-2 text-xs text-muted-foreground"
+                    title={taskSourceAvailabilityNotice.title}
+                  >
+                    <AlertCircle className="size-3.5 flex-none" />
+                    <span className="min-w-0 truncate">{taskSourceAvailabilityNotice.label}</span>
+                  </div>
+                ) : null}
+
                 {taskSource === 'github' ? (
                   <div className="flex min-w-0 flex-wrap items-center gap-2">
                     {projectModeVisible ? (
diff --git a/src/renderer/src/components/task-source-context-summary.test.ts b/src/renderer/src/components/task-source-context-summary.test.ts
index d84a4eadbc7..cac6f0d0917 100644
--- a/src/renderer/src/components/task-source-context-summary.test.ts
+++ b/src/renderer/src/components/task-source-context-summary.test.ts
@@ -1,5 +1,8 @@
 import { describe, expect, it } from 'vitest'
-import { getTaskSourceContextSummary } from './task-source-context-summary'
+import {
+  getTaskSourceAvailabilityNotice,
+  getTaskSourceContextSummary
+} from './task-source-context-summary'
 
 describe('task source context summary', () => {
   it('shows provider, host, and provider identity for a single repo-backed source', () => {
@@ -173,4 +176,28 @@ describe('task source context summary', () => {
       'Linear source · Host: old-server · Availability: old-server server update needed · Account: Stably'
     )
   })
+
+  it('builds a visible unavailable-source notice from host availability', () => {
+    expect(
+      getTaskSourceAvailabilityNotice({
+        providerLabel: 'GitHub',
+        hostAvailability: [{ hostId: 'ssh:devbox', status: 'auth-failed' }]
+      })
+    ).toEqual({
+      label: 'GitHub source unavailable: devbox auth needed',
+      title: 'Reconnect or update devbox auth needed to load this source.',
+      blocking: true
+    })
+
+    expect(
+      getTaskSourceAvailabilityNotice({
+        providerLabel: 'GitLab',
+        sourceCount: 3,
+        hostAvailability: [
+          { hostId: 'ssh:devbox', status: 'disconnected' },
+          { hostId: 'runtime:old-server', health: 'blocked' }
+        ]
+      })?.label
+    ).toBe('Some GitLab source hosts unavailable: 2 source hosts')
+  })
 })
diff --git a/src/renderer/src/components/task-source-context-summary.ts b/src/renderer/src/components/task-source-context-summary.ts
index 821162bccd2..bc6fbbef6f7 100644
--- a/src/renderer/src/components/task-source-context-summary.ts
+++ b/src/renderer/src/components/task-source-context-summary.ts
@@ -10,6 +10,12 @@ export type TaskSourceContextSummary = {
   title: string
 }
 
+export type TaskSourceAvailabilityNotice = {
+  label: string
+  title: string
+  blocking: boolean
+}
+
 export type TaskSourceHostAvailability = {
   hostId: ExecutionHostScope
   status?: SshConnectionStatus
@@ -45,6 +51,29 @@ export function getTaskSourceContextSummary(args: {
   }
 }
 
+export function getTaskSourceAvailabilityNotice(args: {
+  providerLabel: string
+  hostAvailability?: readonly TaskSourceHostAvailability[]
+  sourceCount?: number
+}): TaskSourceAvailabilityNotice | null {
+  const unavailableHosts = getUnavailableHosts(args.hostAvailability ?? [])
+  if (unavailableHosts.length === 0) {
+    return null
+  }
+  const sourceCount = Math.max(args.sourceCount ?? unavailableHosts.length, unavailableHosts.length)
+  const blocking = unavailableHosts.length >= sourceCount
+  const hostStatusLabels = unavailableHosts.map((host) => `${host.hostLabel} ${host.statusLabel}`)
+  const target =
+    unavailableHosts.length === 1 ? hostStatusLabels[0] : `${unavailableHosts.length} source hosts`
+  return {
+    label: blocking
+      ? `${args.providerLabel} source unavailable: ${target}`
+      : `Some ${args.providerLabel} source hosts unavailable: ${target}`,
+    title: `Reconnect or update ${formatLongList(hostStatusLabels)} to load this source.`,
+    blocking
+  }
+}
+
 function getRepoBackedTaskSourceSummary(args: {
   providerLabel: string
   repoContexts?: readonly TaskSourceContext[]