diff --git a/config/main-layout-writer-baseline.txt b/config/main-layout-writer-baseline.txt
index de058e072da..78eb307baba 100644
--- a/config/main-layout-writer-baseline.txt
+++ b/config/main-layout-writer-baseline.txt
@@ -42,6 +42,7 @@
 4 src/main/persistence/migrating-orcad-catalog/orcad-source-workspace-session-subtraction.ts
 1 src/main/persistence/migrating-orcad-catalog/orcad-source-workspace-session.ts
 1 src/main/persistence/restoring-sessions/folder-workspace-operations.ts
+1 src/main/persistence/restoring-sessions/invalid-workspace-layout-purge.ts
 5 src/main/persistence/restoring-sessions/session-owner-fields.ts
 12 src/main/persistence/restoring-sessions/session-owner-removal.ts
 2 src/main/persistence/restoring-sessions/workspace-pane-normalization.ts
diff --git a/src/main/ipc/worktrees/listing/host-qualified-worktree-listing.ts b/src/main/ipc/worktrees/listing/host-qualified-worktree-listing.ts
index 3e1798fda2d..905e6b2378d 100644
--- a/src/main/ipc/worktrees/listing/host-qualified-worktree-listing.ts
+++ b/src/main/ipc/worktrees/listing/host-qualified-worktree-listing.ts
@@ -21,6 +21,8 @@ import {
   isCapturedRepoCurrent,
   resolveRepoOwnershipEvidence
 } from './worktree-host-ownership'
+import { ORCA_LAYOUT_OWNER_IS_MAIN } from '../../../../shared/layout-owner-switch'
+import { dropWorkspacesTheListingInvalidates } from '../../../persistence/restoring-sessions/invalid-workspace-layout-purge'
 
 export async function listHostQualifiedDetectedWorktrees(
   store: Store,
@@ -90,6 +92,9 @@ export async function listHostQualifiedDetectedWorktrees(
     return capturedAuthority !== null && isCurrentSshProviderAuthority(capturedAuthority)
   }
   const result = await listDetectedWorktreesForCapturedRepo(store, repo, isCurrent, providerAbort)
+  if (ORCA_LAYOUT_OWNER_IS_MAIN) {
+    dropWorkspacesTheListingInvalidates(store, result)
+  }
   if (!result) {
     return rejected('stale')
   }
diff --git a/src/main/ipc/worktrees/listing/register-detected-worktree-handlers.ts b/src/main/ipc/worktrees/listing/register-detected-worktree-handlers.ts
index ed9ca41aed3..87e0ee899f7 100644
--- a/src/main/ipc/worktrees/listing/register-detected-worktree-handlers.ts
+++ b/src/main/ipc/worktrees/listing/register-detected-worktree-handlers.ts
@@ -23,6 +23,8 @@ import {
 import { listHostQualifiedDetectedWorktrees } from './host-qualified-worktree-listing'
 import { findExactRepoOwner, isCapturedRepoCurrent } from './worktree-host-ownership'
 import type { WorktreeIpcContext } from '../worktree-ipc-context'
+import { ORCA_LAYOUT_OWNER_IS_MAIN } from '../../../../shared/layout-owner-switch'
+import { dropWorkspacesTheListingInvalidates } from '../../../persistence/restoring-sessions/invalid-workspace-layout-purge'
 
 export const DETECTED_WORKTREE_PROVIDER_TIMEOUT_MS = 30_000
 
@@ -113,6 +115,9 @@ export function registerDetectedWorktreeHandlers(context: WorktreeIpcContext): v
           isCapturedRepoCurrent(store, repo) &&
           (!connectionId || (authority !== undefined && isCurrentSshProviderAuthority(authority)))
       )
+      if (ORCA_LAYOUT_OWNER_IS_MAIN) {
+        dropWorkspacesTheListingInvalidates(store, result)
+      }
       return result && !('providerAbortStatus' in result)
         ? result
         : {
diff --git a/src/main/persistence-invalid-workspace-layout-purge.test.ts b/src/main/persistence-invalid-workspace-layout-purge.test.ts
new file mode 100644
index 00000000000..dbc62314021
--- /dev/null
+++ b/src/main/persistence-invalid-workspace-layout-purge.test.ts
@@ -0,0 +1,242 @@
+import {
+  closeTestStores,
+  testState,
+  createStore,
+  writeDataFile,
+  makeRepo,
+  makeTerminalTab
+} from './persistence-test-harness'
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
+import { rmSync, mkdtempSync } from 'node:fs'
+import { join } from 'node:path'
+import { tmpdir } from 'node:os'
+import { FLOATING_TERMINAL_WORKTREE_ID, getDefaultWorkspaceSession } from '../shared/constants'
+import { folderWorkspaceKey } from '../shared/workspace-scope'
+import type { WorkspaceSessionState } from '../shared/workspace-session-state-types'
+import type { DetectedWorktreeListResult } from '../shared/worktree/types'
+import type { WorkspaceLayoutEvent } from '../shared/workspace-layout/workspace-layout-stream-frames'
+import {
+  bumpLocalWorktreeScanGeneration,
+  getLocalWorktreeCatalogVersion
+} from './local-worktree-scan-generation'
+import { dropWorkspacesTheListingInvalidates } from './persistence/restoring-sessions/invalid-workspace-layout-purge'
+import { WorkspaceLayoutStream } from './runtime/workspace-layout-stream'
+
+vi.mock('../shared/layout-owner-switch', () => ({ ORCA_LAYOUT_OWNER_IS_MAIN: true }))
+vi.mock('./ssh/ssh-config-parser', () => ({
+  loadUserSshConfig: vi.fn(),
+  sshConfigHostsToTargets: vi.fn()
+}))
+vi.mock('electron', () => ({
+  app: { getPath: () => testState.dir },
+  safeStorage: { isEncryptionAvailable: () => false }
+}))
+vi.mock('./telemetry/client', () => ({ track: vi.fn() }))
+vi.mock('./telemetry/cohort-classifier', () => ({ getCohortAtEmit: vi.fn().mockReturnValue({}) }))
+
+const REPO = 'repo-a'
+const KEPT = `${REPO}::/work/kept`
+const DELETED = `${REPO}::/work/deleted`
+const SSH_REPO = 'ssh-repo'
+const SSH_WORKTREE = `${SSH_REPO}::/home/me/app`
+const SSH_HOST = 'ssh:target-1'
+const RUNTIME_HOST = 'runtime:env-a'
+const PAIRED_WORKTREE = 'paired-repo::/srv/app'
+
+function sessionWith(...worktreeIds: string[]): WorkspaceSessionState {
+  return {
+    ...getDefaultWorkspaceSession(),
+    tabsByWorktree: Object.fromEntries(
+      worktreeIds.map((worktreeId, index) => [
+        worktreeId,
+        [makeTerminalTab({ id: `tab-${index}`, ptyId: `pty-${index}`, worktreeId })]
+      ])
+    )
+  }
+}
+
+function listing(
+  worktreeIds: string[],
+  overrides: Partial<DetectedWorktreeListResult> = {}
+): DetectedWorktreeListResult {
+  return {
+    repoId: REPO,
+    authoritative: true,
+    source: 'git',
+    catalogVersion: getLocalWorktreeCatalogVersion(REPO),
+    // oxlint-disable-next-line typescript/consistent-type-assertions -- SAFETY: the purge reads only each row's id.
+    worktrees: worktreeIds.map((id) => ({ id }) as DetectedWorktreeListResult['worktrees'][number]),
+    ...overrides
+  }
+}
+
+const storedKeys = (store: ReturnType<typeof createStore>, hostId?: string): string[] =>
+  Object.keys(store.getWorkspaceSession(hostId).tabsByWorktree).sort()
+
+describe('main drops the layout of workspaces the catalog no longer validates', () => {
+  beforeEach(() => {
+    testState.dir = mkdtempSync(join(tmpdir(), 'orca-invalid-layout-purge-'))
+  })
+
+  afterEach(async () => {
+    await closeTestStores()
+    rmSync(testState.dir, { recursive: true, force: true })
+  })
+
+  describe('at load', () => {
+    it('drops a stored workspace of a deregistered repo', () => {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [makeRepo({ id: REPO, path: '/work/kept' })],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, 'gone-repo::/work/gone')
+      })
+
+      expect(storedKeys(createStore())).toEqual([KEPT])
+    })
+
+    it('drops a stored workspace whose key names no registered repo, as the window does', () => {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [makeRepo({ id: REPO, path: '/work/kept' })],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, 'legacy-bare-key')
+      })
+
+      expect(storedKeys(createStore())).toEqual([KEPT])
+    })
+
+    it('keeps a degraded but registered repo, a disconnected SSH repo, folders and the floating workspace', () => {
+      const folderKey = folderWorkspaceKey('folder-never-listed')
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [
+          makeRepo({ id: REPO, path: '/work/kept' }),
+          makeRepo({ id: SSH_REPO, path: '/home/me/app', connectionId: 'target-1' })
+        ],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, DELETED, folderKey, FLOATING_TERMINAL_WORKTREE_ID),
+        workspaceSessionsByHostId: { [SSH_HOST]: sessionWith(SSH_WORKTREE) }
+      })
+
+      const store = createStore()
+
+      expect(storedKeys(store)).toEqual(
+        [KEPT, DELETED, folderKey, FLOATING_TERMINAL_WORKTREE_ID].sort()
+      )
+      expect(storedKeys(store, SSH_HOST)).toEqual([SSH_WORKTREE])
+    })
+
+    it("keeps a paired host's workspaces, whose catalog lives on that host", () => {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [],
+        worktreeMeta: { [PAIRED_WORKTREE]: { hostId: RUNTIME_HOST, status: 'active' } },
+        workspaceSession: sessionWith(PAIRED_WORKTREE),
+        workspaceSessionsByHostId: { [RUNTIME_HOST]: sessionWith(PAIRED_WORKTREE, 'bare-paired') }
+      })
+
+      const store = createStore()
+
+      expect(storedKeys(store)).toEqual([PAIRED_WORKTREE])
+      expect(storedKeys(store, RUNTIME_HOST)).toEqual(['bare-paired', PAIRED_WORKTREE].sort())
+    })
+  })
+
+  describe('when a listing changes the catalog', () => {
+    function seededStore(): ReturnType<typeof createStore> {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [
+          makeRepo({ id: REPO, path: '/work/kept' }),
+          makeRepo({ id: 'other-repo', path: '/x' })
+        ],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, DELETED, 'other-repo::/x')
+      })
+      return createStore()
+    }
+
+    it("drops the workspace an authoritative scan no longer finds, and the window's frames lose it", async () => {
+      const store = seededStore()
+      const stream = new WorkspaceLayoutStream({
+        store: () => store,
+        homeHostId: () => 'local',
+        liveTitle: () => null
+      })
+      const events: WorkspaceLayoutEvent[] = []
+      const { snapshot } = stream.subscribe((event) => events.push(event))
+      expect(snapshot.map((entry) => entry.key)).toContain(DELETED)
+
+      dropWorkspacesTheListingInvalidates(store, listing([KEPT]))
+      await Promise.resolve()
+
+      // Other repos have no listing in this catalog, so they are untouched.
+      expect(storedKeys(store)).toEqual([KEPT, 'other-repo::/x'].sort())
+      expect(events).toContainEqual(expect.objectContaining({ type: 'removed', key: DELETED }))
+    })
+
+    it('keeps every workspace after a scan that could not prove deletion', () => {
+      const store = seededStore()
+
+      dropWorkspacesTheListingInvalidates(
+        store,
+        listing([], { authoritative: false, source: 'metadata-fallback' })
+      )
+      dropWorkspacesTheListingInvalidates(
+        store,
+        listing([KEPT], { authoritative: false, source: 'metadata-fallback' })
+      )
+      dropWorkspacesTheListingInvalidates(store, null)
+      dropWorkspacesTheListingInvalidates(store, { providerAbortStatus: 'timed-out' })
+
+      expect(storedKeys(store)).toEqual([KEPT, DELETED, 'other-repo::/x'].sort())
+    })
+
+    it('keeps every workspace when a create or remove landed after the scan began', () => {
+      const store = seededStore()
+      const stale = listing([KEPT])
+      bumpLocalWorktreeScanGeneration(REPO)
+
+      dropWorkspacesTheListingInvalidates(store, stale)
+      dropWorkspacesTheListingInvalidates(store, listing([KEPT], { catalogVersion: undefined }))
+
+      expect(storedKeys(store)).toEqual([KEPT, DELETED, 'other-repo::/x'].sort())
+    })
+
+    it('keeps every workspace of a repo id another host also registers', () => {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [
+          makeRepo({ id: REPO, path: '/work/kept' }),
+          makeRepo({ id: REPO, path: '/home/me/kept', connectionId: 'target-1' })
+        ],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, DELETED)
+      })
+      const store = createStore()
+
+      dropWorkspacesTheListingInvalidates(store, listing([KEPT]))
+
+      expect(storedKeys(store)).toEqual([KEPT, DELETED].sort())
+    })
+  })
+
+  // Pending until Core-A: today a window save still carries structure, so it can restore the key.
+  it.skip('a later window save that still names a dropped workspace does not bring it back', () => {
+    const store = (() => {
+      writeDataFile({
+        schemaVersion: 1,
+        repos: [makeRepo({ id: REPO, path: '/work/kept' })],
+        worktreeMeta: {},
+        workspaceSession: sessionWith(KEPT, DELETED)
+      })
+      return createStore()
+    })()
+    dropWorkspacesTheListingInvalidates(store, listing([KEPT]))
+
+    store.setWorkspaceSession(sessionWith(KEPT, DELETED), 'local')
+
+    expect(storedKeys(store)).toEqual([KEPT])
+  })
+})
diff --git a/src/main/persistence/loading-store/store.ts b/src/main/persistence/loading-store/store.ts
index 9a231075311..21c89b80641 100644
--- a/src/main/persistence/loading-store/store.ts
+++ b/src/main/persistence/loading-store/store.ts
@@ -17,6 +17,8 @@ import {
   type StoreDomainOperations
 } from './store-domain-composition'
 import type { PersistedState } from '../../../shared/persisted-state-types'
+import { ORCA_LAYOUT_OWNER_IS_MAIN } from '../../../shared/layout-owner-switch'
+import { dropInvalidWorkspaceLayoutsAtLoad } from '../restoring-sessions/invalid-workspace-layout-purge'
 import { scheduleSave } from './write-scheduling'
 import {
   migrateLegacyOpenCodeGoApiKey,
@@ -124,6 +126,9 @@ export class Store {
     // Load is the only place an orphaned repo id can be swept: every removal path needs the repo to
     // still be registered, so rows outlive their owner without one (#17776).
     const sweptRepoIds = this.domains.repos.sweepDeregisteredRepoResidue()
+    if (ORCA_LAYOUT_OWNER_IS_MAIN) {
+      dropInvalidWorkspaceLayoutsAtLoad(this, this.state)
+    }
     // Imported snapshots cannot own the live hook server or write their source file.
     if (!imported) {
       // A committed migration whose blob install failed or was cut short is finished here; shell
diff --git a/src/main/persistence/restoring-sessions/invalid-workspace-layout-purge.ts b/src/main/persistence/restoring-sessions/invalid-workspace-layout-purge.ts
new file mode 100644
index 00000000000..f292b6aff47
--- /dev/null
+++ b/src/main/persistence/restoring-sessions/invalid-workspace-layout-purge.ts
@@ -0,0 +1,123 @@
+// Layout-owner build only: main drops the stored layout of workspaces the catalog no longer
+// validates, by the same rule the window applies when it hydrates, so neither keeps what the other dropped.
+
+import { FLOATING_TERMINAL_WORKTREE_ID } from '../../../shared/constants'
+import { parseExecutionHostId, type ExecutionHostId } from '../../../shared/execution-host'
+import type { PersistedState } from '../../../shared/persisted-state-types'
+import type { WorkspaceSessionState } from '../../../shared/workspace-session-state-types'
+import { parseWorkspaceKey } from '../../../shared/workspace-scope'
+import { isWorktreeCatalogVersionBefore } from '../../../shared/worktree/catalog-version'
+import {
+  buildValidWorktreeIdsForSessionHydration,
+  collectPersistedWorktreeIdsForSessionHydration
+} from '../../../shared/worktree/degraded-repo-worktree-validity'
+import { getRepoIdFromWorktreeId } from '../../../shared/worktree/id'
+import type { DetectedWorktreeListResult } from '../../../shared/worktree/types'
+import { getLocalWorktreeCatalogVersion } from '../../local-worktree-scan-generation'
+
+type WorkspaceValidityCatalog = Parameters<typeof buildValidWorktreeIdsForSessionHydration>[0]
+
+type PurgeStore = {
+  getRepos(): readonly { id: string }[]
+  getWorkspaceSession(hostId?: string | null): WorkspaceSessionState
+  getWorkspaceSessionHostIds(): ExecutionHostId[]
+  removeWorkspaceSessionStateForWorktree(worktreeId: string, hostId?: ExecutionHostId | null): void
+}
+
+const ownedByPairedHost = (hostId: string | null | undefined): boolean =>
+  parseExecutionHostId(hostId)?.kind === 'runtime'
+
+/** The window's hydration rule: floating and every folder key always stay (the window adds them). */
+function invalidWorkspaceKeys(
+  session: WorkspaceSessionState,
+  catalog: WorkspaceValidityCatalog,
+  inScope: (key: string) => boolean
+): string[] {
+  const persisted = [...collectPersistedWorktreeIdsForSessionHydration(session)].filter(
+    (key) =>
+      inScope(key) &&
+      key !== FLOATING_TERMINAL_WORKTREE_ID &&
+      parseWorkspaceKey(key)?.type !== 'folder'
+  )
+  const valid = buildValidWorktreeIdsForSessionHydration(catalog, persisted)
+  return persisted.filter((key) => !valid.has(key))
+}
+
+function dropInvalidWorkspaces(
+  store: PurgeStore,
+  catalog: WorkspaceValidityCatalog,
+  inScope: (key: string) => boolean = () => true
+): void {
+  for (const hostId of store.getWorkspaceSessionHostIds()) {
+    // A paired host's catalog lives on that host; not seeing it here proves nothing.
+    if (ownedByPairedHost(hostId)) {
+      continue
+    }
+    for (const key of invalidWorkspaceKeys(store.getWorkspaceSession(hostId), catalog, inScope)) {
+      store.removeWorkspaceSessionStateForWorktree(key, hostId)
+    }
+  }
+}
+
+/**
+ * At load no listing has run, so only an unregistered repo is invalid. Repos a paired host still
+ * names, and a staged migration's repos, count as registered, exactly as the load sweep keeps them.
+ */
+export function dropInvalidWorkspaceLayoutsAtLoad(store: PurgeStore, state: PersistedState): void {
+  const repoIds = new Set(store.getRepos().map((repo) => repo.id))
+  for (const staged of state.orcadMigrationStagedCatalogs ?? []) {
+    for (const repo of staged.manifest.payload.repositories) {
+      repoIds.add(repo.id)
+    }
+  }
+  for (const [worktreeId, meta] of Object.entries(state.worktreeMeta)) {
+    if (ownedByPairedHost(meta.hostId)) {
+      repoIds.add(getRepoIdFromWorktreeId(worktreeId))
+    }
+  }
+  for (const [hostId, session] of Object.entries(state.workspaceSessionsByHostId ?? {})) {
+    if (session && ownedByPairedHost(hostId)) {
+      for (const key of collectPersistedWorktreeIdsForSessionHydration(session)) {
+        repoIds.add(getRepoIdFromWorktreeId(key))
+      }
+    }
+  }
+  dropInvalidWorkspaces(store, {
+    repos: [...repoIds].map((id) => ({ id })),
+    worktreesByRepo: {}
+  })
+}
+
+/**
+ * After a listing main serves: drops that repo's workspaces an authoritative scan no longer finds.
+ * Hidden rows still count as found: hiding a worktree must not close its tabs.
+ */
+export function dropWorkspacesTheListingInvalidates(
+  store: PurgeStore,
+  result: DetectedWorktreeListResult | { providerAbortStatus: unknown } | null
+): void {
+  if (!result || 'providerAbortStatus' in result) {
+    return
+  }
+  const { repoId, catalogVersion } = result
+  // A create or remove since the scan began leaves its rows short of live worktrees.
+  if (
+    !catalogVersion ||
+    isWorktreeCatalogVersionBefore(catalogVersion, getLocalWorktreeCatalogVersion(repoId))
+  ) {
+    return
+  }
+  // A repo id registered on two hosts shares its keys; one host's scan cannot speak for the other.
+  if (store.getRepos().filter((repo) => repo.id === repoId).length !== 1) {
+    return
+  }
+  dropInvalidWorkspaces(
+    store,
+    {
+      repos: store.getRepos(),
+      worktreesByRepo: { [repoId]: result.worktrees },
+      detectedWorktreesByRepo: { [repoId]: result }
+    },
+    (key) => getRepoIdFromWorktreeId(key) === repoId
+  )
+}
diff --git a/src/renderer/src/store/slices/browser/browser-hydration-actions.ts b/src/renderer/src/store/slices/browser/browser-hydration-actions.ts
index 22e50b29db6..e3b32623c18 100644
--- a/src/renderer/src/store/slices/browser/browser-hydration-actions.ts
+++ b/src/renderer/src/store/slices/browser/browser-hydration-actions.ts
@@ -2,7 +2,7 @@ import { FLOATING_TERMINAL_WORKTREE_ID } from '../../../../../shared/constants'
 import { folderWorkspaceKey } from '../../../../../shared/workspace-scope'
 import type { BrowserSlice, BrowserSliceGet, BrowserSliceSet } from './browser-slice-contract'
 import { addAdditionalValidWorkspaceKeys } from '@/lib/workspace-session-hydration-keys'
-import { buildValidWorktreeIdsForSessionHydration } from '../degraded-repo-worktree-validity'
+import { buildValidWorktreeIdsForSessionHydration } from '../../../../../shared/worktree/degraded-repo-worktree-validity'
 import { destroyWorkspaceWebviews } from '../browser-webview-cleanup'
 import { projectHydratedBrowserSession } from './browser-hydration-state'
 import { ensureBrowserClientHostsForRestoredPages } from '@/runtime/restored-client-hosted-browser-host-attach'
diff --git a/src/renderer/src/store/slices/editor/actions/hydrate-editor-session.ts b/src/renderer/src/store/slices/editor/actions/hydrate-editor-session.ts
index 894908c889b..75c94fb5e96 100644
--- a/src/renderer/src/store/slices/editor/actions/hydrate-editor-session.ts
+++ b/src/renderer/src/store/slices/editor/actions/hydrate-editor-session.ts
@@ -3,7 +3,7 @@ import type { EditorSlice } from '../types/editor-slice'
 import { addAdditionalValidWorkspaceKeys } from '@/lib/workspace-session-hydration-keys'
 import { FLOATING_TERMINAL_WORKTREE_ID } from '../../../../../../shared/constants'
 import { folderWorkspaceKey } from '../../../../../../shared/workspace-scope'
-import { buildValidWorktreeIdsForSessionHydration } from '../../degraded-repo-worktree-validity'
+import { buildValidWorktreeIdsForSessionHydration } from '../../../../../../shared/worktree/degraded-repo-worktree-validity'
 import { migrateHydratedEditorTabsAndGroups } from '../file-ids/hydrated-editor-file-ids'
 import { buildHydratedEditorSessionState } from './hydrated-editor-session-state'
 
diff --git a/src/renderer/src/store/slices/tabs/tabs-session-actions.ts b/src/renderer/src/store/slices/tabs/tabs-session-actions.ts
index e33f1f533cd..43955147687 100644
--- a/src/renderer/src/store/slices/tabs/tabs-session-actions.ts
+++ b/src/renderer/src/store/slices/tabs/tabs-session-actions.ts
@@ -5,7 +5,7 @@ import { addAdditionalValidWorkspaceKeys } from '@/lib/workspace-session-hydrati
 import {
   buildValidWorktreeIdsForSessionHydration,
   collectPersistedWorktreeIdsForSessionHydration
-} from '../degraded-repo-worktree-validity'
+} from '../../../../../shared/worktree/degraded-repo-worktree-validity'
 import { buildHydratedTabState } from '../tabs-hydration'
 import { projectWorktreeTabModelReconciliation } from './tabs-reconciliation'
 import { createWorktreeTabModelReconciliationBatch } from './tabs-reconciliation-batch'
diff --git a/src/renderer/src/store/terminals/workspace-terminal-hydration.ts b/src/renderer/src/store/terminals/workspace-terminal-hydration.ts
index 2f049441f61..00856998b6d 100644
--- a/src/renderer/src/store/terminals/workspace-terminal-hydration.ts
+++ b/src/renderer/src/store/terminals/workspace-terminal-hydration.ts
@@ -10,7 +10,7 @@ import { addAdditionalValidWorkspaceKeys } from '@/lib/workspace-session-hydrati
 import {
   buildValidWorktreeIdsForSessionHydration,
   collectPersistedWorktreeIdsForSessionHydration
-} from '../slices/degraded-repo-worktree-validity'
+} from '../../../../shared/worktree/degraded-repo-worktree-validity'
 import type { TerminalSlice, TerminalStoreGet, TerminalStoreSet } from './terminal-state'
 import { buildRuntimeSessionPlaceholders } from './workspace-terminal-placeholders'
 import {
diff --git a/src/renderer/src/store/slices/degraded-repo-worktree-validity.ts b/src/shared/worktree/degraded-repo-worktree-validity.ts
similarity index 87%
rename from src/renderer/src/store/slices/degraded-repo-worktree-validity.ts
rename to src/shared/worktree/degraded-repo-worktree-validity.ts
index 16b97061df1..97cc48aea06 100644
--- a/src/renderer/src/store/slices/degraded-repo-worktree-validity.ts
+++ b/src/shared/worktree/degraded-repo-worktree-validity.ts
@@ -1,8 +1,8 @@
-import type { Repo } from '../../../../shared/repo-types'
-import type { WorkspaceSessionState } from '../../../../shared/workspace-session-state-types'
-import type { DetectedWorktreeListResult, Worktree } from '../../../../shared/worktree/types'
-import { parseWorkspaceKey } from '../../../../shared/workspace-scope'
-import { getRepoIdFromWorktreeId } from '../../../../shared/worktree/id'
+import type { Repo } from '../repo-types'
+import type { WorkspaceSessionState } from '../workspace-session-state-types'
+import type { DetectedWorktreeListResult, Worktree } from './types'
+import { parseWorkspaceKey } from '../workspace-scope'
+import { getRepoIdFromWorktreeId } from './id'
 
 type WorktreeValidityCatalog = {
   repos: readonly Pick<Repo, 'id'>[]