diff --git a/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.test.ts b/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.test.ts
index 466452a7614..19d1d4dc835 100644
--- a/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.test.ts
+++ b/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.test.ts
@@ -96,6 +96,45 @@ describe('project header host context', () => {
     expect(getProjectHeaderHostContexts({ rows: [rows[0]!], hosts, repoMap }).size).toBe(0)
   })
 
+  it('leaves distinct project names unlabelled across machines', () => {
+    const unique = { ...paired, displayName: 'website' }
+    expect(
+      getProjectHeaderHostContexts({ rows: [header(local), header(unique)], hosts, repoMap }).size
+    ).toBe(0)
+  })
+
+  it('labels only the colliding names in a mixed sidebar', () => {
+    const unique = { ...local, id: 'website', displayName: 'website' }
+    const contexts = getProjectHeaderHostContexts({
+      rows: [...rows, header(unique)],
+      hosts,
+      repoMap: new Map([...repoMap, [unique.id, unique]])
+    })
+    expect([...contexts.keys()]).toEqual(rows.map((row) => row.key))
+  })
+
+  it('keeps same-name projects quiet when they share a machine', () => {
+    const sibling = { ...local, id: 'sibling' }
+    const unique = { ...paired, displayName: 'website' }
+    expect(
+      getProjectHeaderHostContexts({
+        rows: [header(local), header(sibling), header(unique)],
+        hosts,
+        repoMap: new Map([local, sibling, unique].map((value) => [value.id, value]))
+      }).size
+    ).toBe(0)
+  })
+
+  it('leaves unique folder-backed groups unlabelled across machines', () => {
+    expect(
+      getProjectHeaderHostContexts({
+        rows: [header(local), { ...folderHeader, label: 'documents' }],
+        hosts,
+        repoMap
+      }).size
+    ).toBe(0)
+  })
+
   it('omits redundant labels under actual enclosing host sections', () => {
     expect(getProjectHeaderHostContexts({ rows: [hostHeader, ...rows], hosts, repoMap }).size).toBe(
       0
@@ -214,7 +253,11 @@ describe('project header host context', () => {
 
   it('never labels a multi-host logical project with its representative repo owner', () => {
     const other = { ...paired, id: 'independent' }
-    const logical: GroupHeaderRow = { ...header(repo), key: `project:${project.id}` }
+    const logical: GroupHeaderRow = {
+      ...header(repo),
+      key: `project:${project.id}`,
+      label: project.displayName
+    }
     const contexts = getProjectHeaderHostContexts({
       rows: [logical, header(other)],
       hosts,
@@ -222,7 +265,7 @@ describe('project header host context', () => {
       projectGrouping: { projects: [project], projectHostSetups }
     })
     expect(contexts.has(logical.key)).toBe(false)
-    expect(contexts.get(`repo:${other.id}`)?.hostId).toBe('runtime:home')
+    expect(contexts.size).toBe(0)
   })
 
   describe.each([
@@ -249,7 +292,7 @@ describe('project header host context', () => {
     { name: 'empty local host scope', includeRemote: false, empty: true, hostFiltered: true }
   ])('$name', ({ includeRemote, empty, hostFiltered }) => {
     it.each([false, true])('counts only listed owners (collapsed: %s)', (collapsed) => {
-      const other = { ...local, id: 'independent-local' }
+      const other = { ...local, id: 'independent-local', displayName: project.displayName }
       const map = new Map([repo, remoteRepo, other].map((value) => [value.id, value]))
       const listedRepoIds = [repo.id, ...(includeRemote ? [remoteRepo.id] : []), other.id]
       const items = [
diff --git a/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.ts b/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.ts
index 88f4c26d8ba..8054270dc90 100644
--- a/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.ts
+++ b/src/renderer/src/components/sidebar/worktree-list/rows/project-header-host-context.ts
@@ -61,7 +61,8 @@ export function getProjectHeaderHostContexts(args: {
     hostsByProjectKey.set(key, projectHosts)
   }
   const candidates = new Map<string, ProjectHeaderHostContext>()
-  const visibleHostIds = new Set<ExecutionHostId>()
+  const sectionLabels = new Map<string, string>()
+  const hostsByLabel = new Map<string, Set<ExecutionHostId>>()
   for (const row of args.rows) {
     // Host sections already identify every following project header.
     if (row.type === 'host-header') {
@@ -70,6 +71,13 @@ export function getProjectHeaderHostContexts(args: {
     if (row.type !== 'header' || row.icon.kind !== 'project') {
       continue
     }
+    const label = row.label
+    if (!label) {
+      continue
+    }
+    sectionLabels.set(row.key, label)
+    const labelHosts = hostsByLabel.get(label) ?? new Set<ExecutionHostId>()
+    hostsByLabel.set(label, labelHosts)
     let ownerHostId: ExecutionHostId
     if (row.repo) {
       const projectHosts = hostsByProjectKey.get(row.key)
@@ -83,7 +91,7 @@ export function getProjectHeaderHostContexts(args: {
             })
           : projectHosts
         for (const hostId of visibleProjectHosts) {
-          visibleHostIds.add(hostId)
+          labelHosts.add(hostId)
         }
         continue
       }
@@ -99,7 +107,7 @@ export function getProjectHeaderHostContexts(args: {
       continue
     }
     const hostId = canonicalHostId(ownerHostId)
-    visibleHostIds.add(hostId)
+    labelHosts.add(hostId)
     const host = hostsById.get(hostId)
     candidates.set(row.key, {
       hostId,
@@ -107,6 +115,8 @@ export function getProjectHeaderHostContexts(args: {
       detail: host?.detail ?? getHostContextLabel(hostId)
     })
   }
-  // Keep single-host sidebars quiet, independently of workspace-card preferences.
-  return visibleHostIds.size > 1 ? candidates : new Map()
+  // Only colliding names across machines need a host label.
+  return new Map(
+    [...candidates].filter(([key]) => (hostsByLabel.get(sectionLabels.get(key)!)?.size ?? 0) > 1)
+  )
 }