feat(demo): reduce example sessions

packages/node-runtime/src/services/demo-import.test.ts

@@ -40,11 +40,10 @@ describe('importDemoSessions', () => {
     const sourceLatest = sourceTimestamp('2000-12-10', '22:30:00')
     const documents = [
       createDemoDocument('group', [sourceTimestamp('2000-02-01', '09:00:00'), sourceLatest]),
-      createDemoDocument('private-a', [sourceTimestamp('2000-02-01', '08:30:00')]),
-      createDemoDocument('private-b', [sourceTimestamp('2000-06-01', '10:00:00')]),
-      createDemoDocument('private-c', [sourceTimestamp('2000-12-09', '21:00:00')]),
+      createDemoDocument('private-wukong', [sourceTimestamp('2000-06-01', '10:00:00')]),
     ]
     let downloadIndex = 0
+    const requestedUrls: string[] = []
     const imported: Array<{ name: string; document: any }> = []
     const progress: DemoImportProgress[] = []
     const now = new Date('2026-07-25T04:00:00.000Z')
@@ -53,8 +52,9 @@ describe('importDemoSessions', () => {
       locale: 'cn',
       tempPrefix: 'demo-service-test-',
       targetTimeZone: 'America/Los_Angeles',
-      fetchImpl: async function (this: unknown) {
+      fetchImpl: async function (this: unknown, input) {
         assert.equal(this, globalThis)
+        requestedUrls.push(String(input))
         return new Response(documents[downloadIndex++], { status: 200 })
       },
       now: () => now,
@@ -73,25 +73,19 @@ describe('importDemoSessions', () => {
     assert.deepEqual(result, {
       success: true,
       groupSessionId: 'session-1',
-      privateSessionIds: ['session-2', 'session-3', 'session-4'],
+      privateSessionIds: ['session-2'],
     })
-    assert.equal(imported.length, 4)
+    assert.deepEqual(requestedUrls, [
+      'https://chatlab.fun/assets/demo/cn/demo-group.json',
+      'https://chatlab.fun/assets/demo/cn/demo-private-B-wukong.json',
+    ])
+    assert.equal(imported.length, 2)
     assert.equal(imported[0].document.messages[1].timestamp, latestTimestamp)
-    assert.equal(imported[1].document.messages[0].timestamp, sourceTimestamp('2000-02-01', '08:30:00') + offset)
+    assert.equal(imported[1].document.messages[0].timestamp, sourceTimestamp('2000-06-01', '10:00:00') + offset)
     assert.ok(imported.every(({ document }) => document.chatlab.exportedAt === Math.floor(now.getTime() / 1000)))
     assert.deepEqual(
       progress.map(({ stage, current }) => `${stage}:${current}`),
-      [
-        'downloading:1',
-        'downloading:2',
-        'downloading:3',
-        'downloading:4',
-        'importing:1',
-        'importing:2',
-        'importing:3',
-        'importing:4',
-        'done:4',
-      ]
+      ['downloading:1', 'downloading:2', 'importing:1', 'importing:2', 'done:2']
     )
     assert.ok(imported.every(({ name }) => !fs.existsSync(name)))
   })
@@ -100,12 +94,7 @@ describe('importDemoSessions', () => {
     let importCount = 0
     let downloadIndex = 0
     const progress: DemoImportProgress[] = []
-    const responses = [
-      createDemoDocument('group', [sourceTimestamp('2000-12-10', '22:30:00')]),
-      'x'.repeat(128),
-      createDemoDocument('private-b', [sourceTimestamp('2000-12-09', '21:00:00')]),
-      createDemoDocument('private-c', [sourceTimestamp('2000-12-08', '21:00:00')]),
-    ]
+    const responses = [createDemoDocument('group', [sourceTimestamp('2000-12-10', '22:30:00')]), 'x'.repeat(128)]
 
     const result = await importDemoSessions({
       locale: 'en',
@@ -131,9 +120,7 @@ describe('importDemoSessions', () => {
     const rolledBackSessionIds: string[] = []
     const documents = [
       createDemoDocument('group', [sourceTimestamp('2000-12-10', '22:30:00')]),
-      createDemoDocument('private-a', [sourceTimestamp('2000-12-09', '21:00:00')]),
-      createDemoDocument('private-b', [sourceTimestamp('2000-12-08', '21:00:00')]),
-      createDemoDocument('private-c', [sourceTimestamp('2000-12-07', '21:00:00')]),
+      createDemoDocument('private-wukong', [sourceTimestamp('2000-12-08', '21:00:00')]),
     ]
 
     const result = await importDemoSessions({
@@ -142,7 +129,7 @@ describe('importDemoSessions', () => {
       fetchImpl: async () => new Response(documents[downloadIndex++], { status: 200 }),
       importFile: async () => {
         importCount += 1
-        if (importCount === 3) return { success: false, error: 'third import failed' }
+        if (importCount === 2) return { success: false, error: 'second import failed' }
         return { success: true, sessionId: `session-${importCount}` }
       },
       deleteSession: async (sessionId) => {
@@ -151,7 +138,7 @@ describe('importDemoSessions', () => {
     })
 
     assert.equal(result.success, false)
-    assert.match(result.error ?? '', /third import failed/)
-    assert.deepEqual(rolledBackSessionIds, ['session-2', 'session-1'])
+    assert.match(result.error ?? '', /second import failed/)
+    assert.deepEqual(rolledBackSessionIds, ['session-1'])
   })
 })

packages/node-runtime/src/services/demo-import.ts

@@ -5,12 +5,7 @@ import { appLogger } from '../logging/app-logger'
 import { createChatLabTempDir, removeChatLabTempDir } from '../temp-workspace'
 
 const DEMO_BASE_URL = 'https://chatlab.fun/assets/demo'
-const DEMO_FILES = [
-  'demo-group.json',
-  'demo-private-A-cuilan.json',
-  'demo-private-B-wukong.json',
-  'demo-private-C-spider.json',
-] as const
+const DEMO_FILES = ['demo-group.json', 'demo-private-B-wukong.json'] as const
 
 export interface DemoImportProgress {
   stage: 'downloading' | 'importing' | 'done' | 'error'

src/services/import/browser.test.ts

@@ -125,16 +125,14 @@ describe('BrowserImportAdapter', () => {
     await assert.rejects(adapter.incrementalImport('session-one', createFile()), /not available in Web WASM/i)
   })
 
-  it('downloads and imports the four localized demo files through the browser runtime', async () => {
+  it('downloads and imports the group and Wukong demo files through the browser runtime', async () => {
     const requestedUrls: string[] = []
     const importedFiles: string[] = []
     const importedDocuments: any[] = []
     const sourceLatest = demoTimestamp('2000-12-10', '22:30:00')
     const documents = [
       createDemoDocument('group', [demoTimestamp('2000-02-01', '09:00:00'), sourceLatest]),
-      createDemoDocument('private-a', [demoTimestamp('2000-02-01', '08:30:00')]),
-      createDemoDocument('private-b', [demoTimestamp('2000-06-01', '10:00:00')]),
-      createDemoDocument('private-c', [demoTimestamp('2000-12-09', '21:00:00')]),
+      createDemoDocument('private-wukong', [demoTimestamp('2000-06-01', '10:00:00')]),
     ]
     const now = new Date('2026-07-25T04:00:00.000Z')
     let downloadIndex = 0
@@ -170,40 +168,21 @@ describe('BrowserImportAdapter', () => {
 
     const result = await adapter.importDemo('cn', (event) => progress.push(event.stage))
 
-    assert.deepEqual(requestedUrls, [
-      '/api/demo/cn/demo-group.json',
-      '/api/demo/cn/demo-private-A-cuilan.json',
-      '/api/demo/cn/demo-private-B-wukong.json',
-      '/api/demo/cn/demo-private-C-spider.json',
-    ])
-    assert.deepEqual(importedFiles, [
-      'demo-group.json',
-      'demo-private-A-cuilan.json',
-      'demo-private-B-wukong.json',
-      'demo-private-C-spider.json',
-    ])
+    assert.deepEqual(requestedUrls, ['/api/demo/cn/demo-group.json', '/api/demo/cn/demo-private-B-wukong.json'])
+    assert.deepEqual(importedFiles, ['demo-group.json', 'demo-private-B-wukong.json'])
     const expectedLatest = new Date(now)
     expectedLatest.setDate(expectedLatest.getDate() - 1)
     expectedLatest.setHours(22, 30, 0, 0)
     const latestTimestamp = Math.floor(expectedLatest.getTime() / 1000)
     const offset = latestTimestamp - sourceLatest
     assert.equal(importedDocuments[0].messages[1].timestamp, latestTimestamp)
-    assert.equal(importedDocuments[1].messages[0].timestamp, demoTimestamp('2000-02-01', '08:30:00') + offset)
+    assert.equal(importedDocuments[1].messages[0].timestamp, demoTimestamp('2000-06-01', '10:00:00') + offset)
     assert.ok(importedDocuments.every((document) => document.chatlab.exportedAt === Math.floor(now.getTime() / 1000)))
-    assert.deepEqual(progress, [
-      'downloading',
-      'downloading',
-      'downloading',
-      'downloading',
-      'importing',
-      'importing',
-      'importing',
-      'importing',
-    ])
+    assert.deepEqual(progress, ['downloading', 'downloading', 'importing', 'importing'])
     assert.deepEqual(result, {
       success: true,
       groupSessionId: 'session-1',
-      privateSessionIds: ['session-2', 'session-3', 'session-4'],
+      privateSessionIds: ['session-2'],
     })
   })
 
@@ -272,13 +251,11 @@ describe('BrowserImportAdapter', () => {
 
   it('deletes sessions created earlier in the batch when a later demo import fails', async () => {
     const deletedSessionIds: string[] = []
-    const importError = new Error('third import failed')
+    const importError = new Error('second import failed')
     let importCount = 0
     const documents = [
       createDemoDocument('group', [demoTimestamp('2000-12-10', '22:30:00')]),
-      createDemoDocument('private-a', [demoTimestamp('2000-12-09', '21:00:00')]),
-      createDemoDocument('private-b', [demoTimestamp('2000-12-08', '20:00:00')]),
-      createDemoDocument('private-c', [demoTimestamp('2000-12-07', '19:00:00')]),
+      createDemoDocument('private-wukong', [demoTimestamp('2000-12-08', '20:00:00')]),
     ]
     let downloadIndex = 0
     const rpc = {
@@ -288,7 +265,7 @@ describe('BrowserImportAdapter', () => {
       ): Promise<WebRuntimeTaskResult<T>> {
         if (type === 'import.start') {
           importCount += 1
-          if (importCount === 3) throw importError
+          if (importCount === 2) throw importError
           return {
             sessionId: `session-${importCount}`,
             formatId: 'chatlab',
@@ -314,8 +291,8 @@ describe('BrowserImportAdapter', () => {
     const result = await adapter.importDemo('en')
 
     assert.equal(result.success, false)
-    assert.match(result.error ?? '', /third import failed/)
-    assert.deepEqual(deletedSessionIds, ['session-2', 'session-1'])
+    assert.match(result.error ?? '', /second import failed/)
+    assert.deepEqual(deletedSessionIds, ['session-1'])
   })
 
   it('forwards browser-safe format identifiers to the worker runtime', async () => {

src/services/import/browser.ts

@@ -18,12 +18,7 @@ import type {
 
 const DEMO_BASE_URL = '/api/demo'
 const DEMO_DOWNLOAD_TIMEOUT_MS = 60_000
-const DEMO_FILES = [
-  'demo-group.json',
-  'demo-private-A-cuilan.json',
-  'demo-private-B-wukong.json',
-  'demo-private-C-spider.json',
-] as const
+const DEMO_FILES = ['demo-group.json', 'demo-private-B-wukong.json'] as const
 
 export class BrowserImportAdapter implements ImportAdapter {
   private activeImport: AbortController | undefined