diff --git a/package-lock.json b/package-lock.json
index 7c3f5e3..c4e85d3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2748,9 +2748,9 @@
       "license": "MIT"
     },
     "node_modules/@lvce-editor/api": {
-      "version": "9.36.0",
-      "resolved": "https://registry.npmjs.org/@lvce-editor/api/-/api-9.36.0.tgz",
-      "integrity": "sha512-uu/Nya4K0GFPCgn/htuS5A5KV2Tm1RGY0mNFctjbmUqss/mLYvmrzSBYEOdpJwgkVYO03FHxybEk6k1bv3N97w==",
+      "version": "9.43.1",
+      "resolved": "https://registry.npmjs.org/@lvce-editor/api/-/api-9.43.1.tgz",
+      "integrity": "sha512-8ddaby7RRwvw98mD33sagF9ZKLbV6xT1r+LQx5AI3dCDX4SF6VLPBoh1ee8XL6Oea1RIfUgdwvewep7vkIUi7w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -14971,7 +14971,7 @@
       "version": "0.0.0-dev",
       "license": "MIT",
       "devDependencies": {
-        "@lvce-editor/api": "^9.36.0"
+        "@lvce-editor/api": "^9.43.1"
       }
     },
     "packages/memory": {
diff --git a/packages/extension/package.json b/packages/extension/package.json
index b558783..18d6085 100644
--- a/packages/extension/package.json
+++ b/packages/extension/package.json
@@ -4,7 +4,7 @@
   "license": "MIT",
   "type": "module",
   "devDependencies": {
-    "@lvce-editor/api": "^9.36.0"
+    "@lvce-editor/api": "^9.43.1"
   },
   "scripts": {
     "test": "node --experimental-test-module-mocks --test test/*.test.ts"
diff --git a/packages/extension/src/devcontainerMain.ts b/packages/extension/src/devcontainerMain.ts
index 6068317..2fbe9c6 100644
--- a/packages/extension/src/devcontainerMain.ts
+++ b/packages/extension/src/devcontainerMain.ts
@@ -5,6 +5,7 @@ import {
 } from '@lvce-editor/api'
 import * as BuildError from './parts/BuildError/BuildError.ts'
 import { fileSystem } from './parts/FileSystem/FileSystem.ts'
+import * as Progress from './parts/Progress/Progress.ts'
 import * as RegisterCommands from './parts/RegisterCommands/RegisterCommands.ts'
 
 const state = {
@@ -17,11 +18,14 @@ export const activate = async (): Promise<void> => {
   }
   state.isActivated = true
   await activateExtensionApi()
+  Progress.registerWorkspaceProgress()
   registerFileSystemProvider(fileSystem)
   registerFileSystemProvider(BuildError.fileSystem)
   RegisterCommands.registerCommands()
 }
 
-export const deactivate = (): void => {}
+export const deactivate = (): void => {
+  void Progress.deactivateWorkspaceProgress()
+}
 
 await activate()
diff --git a/packages/extension/src/parts/Progress/Progress.ts b/packages/extension/src/parts/Progress/Progress.ts
index c10d3d6..81f70f9 100644
--- a/packages/extension/src/parts/Progress/Progress.ts
+++ b/packages/extension/src/parts/Progress/Progress.ts
@@ -1,7 +1,12 @@
+import type {
+  WorkspaceProgressData,
+  WorkspaceProgressProviderHandle,
+} from '@lvce-editor/api'
 import {
   createOutputChannel,
   executeCommand,
   openOutputView,
+  registerWorkspaceProgressProvider,
   showNotification,
 } from '@lvce-editor/api'
 import * as Rpc from '../Rpc/Rpc.ts'
@@ -9,6 +14,39 @@ import * as Rpc from '../Rpc/Rpc.ts'
 let output: ReturnType<typeof createOutputChannel> | undefined
 let busy = false
 let monitorGeneration = 0
+const workspaceProgressState: {
+  data: WorkspaceProgressData
+  operationId: number | undefined
+  registration: WorkspaceProgressProviderHandle | undefined
+} = {
+  data: { message: '', status: 'idle' },
+  operationId: undefined,
+  registration: undefined,
+}
+
+export const registerWorkspaceProgress = (): void => {
+  workspaceProgressState.registration = registerWorkspaceProgressProvider({
+    getProgressData: () => workspaceProgressState.data,
+    id: 'devcontainer.setup',
+  })
+}
+
+export const deactivateWorkspaceProgress = async (): Promise<void> => {
+  workspaceProgressState.data = { message: '', status: 'idle' }
+  await workspaceProgressState.registration?.dispose()
+  workspaceProgressState.registration = undefined
+}
+
+const setWorkspaceProgressData = async (
+  data: WorkspaceProgressData,
+): Promise<void> => {
+  workspaceProgressState.data = data
+  try {
+    await workspaceProgressState.registration?.refresh(workspaceProgressState.operationId)
+  } catch {
+    // Workspace progress is optional and cannot interrupt container setup.
+  }
+}
 
 const refreshOutput = async (): Promise<void> => {
   try {
@@ -40,6 +78,21 @@ export const run = async (
     const header = `Starting Dev Containers for ${workspaceFolder}…\n`
     await channel.replace(header)
     await openOutputView({ channel: 'dev-containers' })
+    let workspaceProgressId: unknown
+    try {
+      workspaceProgressId = await executeCommand(
+        'Workspace.startProgress',
+        header.trim(),
+      )
+    } catch {
+      // Workspace progress is optional and cannot interrupt container setup.
+    }
+    workspaceProgressState.operationId =
+      typeof workspaceProgressId === 'number' ? workspaceProgressId : undefined
+    await setWorkspaceProgressData({
+      message: header.trim(),
+      status: 'in-progress',
+    })
     const progressId = crypto.randomUUID()
     const completed = Promise.withResolvers<void>()
     let finished = false
@@ -49,6 +102,9 @@ export const run = async (
       if (typeof text === 'string' && text !== previous) {
         previous = text
         await channel.replace(header + text)
+        const message = text.trim().split('\n').findLast(Boolean)
+        if (message)
+          await setWorkspaceProgressData({ message, status: 'in-progress' })
         // Extension output storage currently has no change notifications. Refresh
         // the visible channel without reopening the panel or changing selection.
         await refreshOutput()
@@ -81,6 +137,24 @@ export const run = async (
         progressId,
         workspaceFolder,
       })
+      if (result && typeof result === 'object' && 'ok' in result && result.ok) {
+        await setWorkspaceProgressData({
+          message: 'Dev Container is ready',
+          status: 'finished',
+        })
+      } else {
+        const errorMessage =
+          result &&
+          typeof result === 'object' &&
+          'errorMessage' in result &&
+          typeof result.errorMessage === 'string'
+            ? result.errorMessage
+            : 'Dev Container setup failed'
+        await setWorkspaceProgressData({
+          message: errorMessage,
+          status: 'error',
+        })
+      }
       if (result && typeof result === 'object' && 'ok' in result && result.ok) {
         // Lifecycle commands have their own lifetime; they do not hold the
         // startup guard while the editor is connected to the container.
@@ -93,6 +167,15 @@ export const run = async (
       finished = true
       completed.resolve()
       await polling
+      await setWorkspaceProgressData({ message: '', status: 'idle' })
+      workspaceProgressState.operationId = undefined
+      if (typeof workspaceProgressId === 'number') {
+        try {
+          await executeCommand('Workspace.endProgress', workspaceProgressId)
+        } catch {
+          // The workspace operation may have been cancelled or superseded.
+        }
+      }
       try {
         await refresh()
       } catch {
diff --git a/packages/extension/test/DevContainerProgress.test.ts b/packages/extension/test/DevContainerProgress.test.ts
index fe64d14..ac27e16 100644
--- a/packages/extension/test/DevContainerProgress.test.ts
+++ b/packages/extension/test/DevContainerProgress.test.ts
@@ -4,6 +4,8 @@ import { mock, test } from 'node:test'
 const events: string[] = []
 const pending = Promise.withResolvers<unknown>()
 let startupResult: unknown = pending.promise
+let workspaceProgressProvider:
+  { getProgressData: () => { message: string; status: string } } | undefined
 let lifecycle = {
   errorMessage: undefined as string | undefined,
   output: '',
@@ -26,6 +28,12 @@ mock.module('@lvce-editor/api', {
       events.push('output opened')
     },
     openUri: async () => {},
+    registerWorkspaceProgressProvider: (provider: {
+      getProgressData: () => { message: string; status: string }
+    }) => {
+      workspaceProgressProvider = provider
+      return { dispose: async () => {}, refresh: async () => {} }
+    },
     showNotification: async (_type: string, message: string) => {
       events.push(message)
     },
@@ -46,8 +54,10 @@ mock.module('../src/parts/Rpc/Rpc.ts', {
 })
 const { openWorkspace } =
   await import('../src/parts/DevContainerCommands/DevContainerCommands.ts')
+const Progress = await import('../src/parts/Progress/Progress.ts')
 
 await test('reopen opens output and displays logs before the build finishes', async () => {
+  Progress.registerWorkspaceProgress()
   const operation = openWorkspace()
   try {
     await new Promise((resolve) => setTimeout(resolve, 600))
@@ -60,6 +70,10 @@ await test('reopen opens output and displays logs before the build finishes', as
       events.some((text) => text.includes('Building layer 1')),
       'Build output must appear before completion',
     )
+    assert.deepEqual(workspaceProgressProvider?.getProgressData(), {
+      message: 'Building layer 1',
+      status: 'in-progress',
+    })
   } finally {
     pending.resolve({ errorMessage: 'build failed', ok: false })
     await operation
@@ -68,6 +82,11 @@ await test('reopen opens output and displays logs before the build finishes', as
         text.includes('Failed to open devcontainer workspace: build failed'),
       ),
     )
+    assert.deepEqual(workspaceProgressProvider?.getProgressData(), {
+      message: '',
+      status: 'idle',
+    })
+    await Progress.deactivateWorkspaceProgress()
   }
 })