feat(knowledge base): enhance knowledge base with rerank model

src/main/ipc.ts

@@ -189,6 +189,7 @@ export function registerIpc(mainWindow: BrowserWindow, app: Electron.App) {
   ipcMain.handle('knowledge-base:add', KnowledgeService.add)
   ipcMain.handle('knowledge-base:remove', KnowledgeService.remove)
   ipcMain.handle('knowledge-base:search', KnowledgeService.search)
+  ipcMain.handle('knowledge-base:rerank', KnowledgeService.rerank)
 
   // window
   ipcMain.handle('window:set-minimum-size', (_, width: number, height: number) => {

src/main/reranker/BaseReranker.ts

@@ -0,0 +1,20 @@
+import type { ExtractChunkData } from '@llm-tools/embedjs-interfaces'
+import { KnowledgeBaseParams } from '@types'
+
+export default abstract class BaseReranker {
+  protected base: KnowledgeBaseParams
+  constructor(base: KnowledgeBaseParams) {
+    if (!base.rerankModel) {
+      throw new Error('Rerank model is required')
+    }
+    this.base = base
+  }
+  abstract rerank(query: string, searchResults: ExtractChunkData[]): Promise<ExtractChunkData[]>
+
+  public defaultHeaders() {
+    return {
+      Authorization: `Bearer ${this.base.apiKey}`,
+      'Content-Type': 'application/json'
+    }
+  }
+}

src/main/reranker/DefaultReranker.ts

@@ -0,0 +1,13 @@
+import type { ExtractChunkData } from '@llm-tools/embedjs-interfaces'
+import { KnowledgeBaseParams } from '@types'
+
+import BaseReranker from './BaseReranker'
+
+export default class DefaultReranker extends BaseReranker {
+  constructor(base: KnowledgeBaseParams) {
+    super(base)
+  }
+  async rerank(): Promise<ExtractChunkData[]> {
+    throw new Error('Method not implemented.')
+  }
+}

src/main/reranker/Reranker.ts

@@ -0,0 +1,15 @@
+import type { ExtractChunkData } from '@llm-tools/embedjs-interfaces'
+import { KnowledgeBaseParams } from '@types'
+
+import BaseReranker from './BaseReranker'
+import RerankerFactory from './RerankerFactory'
+
+export default class Reranker {
+  private sdk: BaseReranker
+  constructor(base: KnowledgeBaseParams) {
+    this.sdk = RerankerFactory.create(base)
+  }
+  public async rerank(query: string, searchResults: ExtractChunkData[]): Promise<ExtractChunkData[]> {
+    return this.sdk.rerank(query, searchResults)
+  }
+}

src/main/reranker/RerankerFactory.ts

@@ -0,0 +1,14 @@
+import { KnowledgeBaseParams } from '@types'
+
+import BaseReranker from './BaseReranker'
+import DefaultReranker from './DefaultReranker'
+import SiliconFlowReranker from './SiliconFlowReranker'
+
+export default class RerankerFactory {
+  static create(base: KnowledgeBaseParams): BaseReranker {
+    if (base.rerankModelProvider === 'silicon') {
+      return new SiliconFlowReranker(base)
+    }
+    return new DefaultReranker(base)
+  }
+}

src/main/reranker/SiliconFlowReranker.ts

@@ -0,0 +1,46 @@
+import type { ExtractChunkData } from '@llm-tools/embedjs-interfaces'
+import { KnowledgeBaseParams } from '@types'
+import axios from 'axios'
+
+import BaseReranker from './BaseReranker'
+
+export default class SiliconFlowReranker extends BaseReranker {
+  constructor(base: KnowledgeBaseParams) {
+    super(base)
+  }
+
+  public rerank = async (query: string, searchResults: ExtractChunkData[]): Promise<ExtractChunkData[]> => {
+    const url = `${this.base.baseURL}/rerank`
+
+    const { data } = await axios.post(
+      url,
+      {
+        model: this.base.rerankModel,
+        query,
+        documents: searchResults.map((doc) => doc.pageContent),
+        top_n: this.base.topN,
+        max_chunks_per_doc: this.base.chunkSize,
+        overlap_tokens: this.base.chunkOverlap
+      },
+      {
+        headers: this.defaultHeaders()
+      }
+    )
+
+    const rerankResults = data.results
+    const resultMap = new Map(rerankResults.map((result: any) => [result.index, result.relevance_score || 0]))
+
+    return searchResults
+      .map((doc: ExtractChunkData, index: number) => {
+        const score = resultMap.get(index)
+        if (score === undefined) return undefined
+
+        return {
+          ...doc,
+          score
+        }
+      })
+      .filter((doc): doc is ExtractChunkData => doc !== undefined)
+      .sort((a, b) => b.score - a.score)
+  }
+}

src/main/services/KnowledgeService.ts

@@ -23,6 +23,7 @@ import { SitemapLoader } from '@llm-tools/embedjs-loader-sitemap'
 import { WebLoader } from '@llm-tools/embedjs-loader-web'
 import { AzureOpenAiEmbeddings, OpenAiEmbeddings } from '@llm-tools/embedjs-openai'
 import { addFileLoader } from '@main/loader'
+import Reranker from '@main/reranker/Reranker'
 import { proxyManager } from '@main/services/ProxyManager'
 import { windowService } from '@main/services/WindowService'
 import { getInstanceName } from '@main/utils'
@@ -482,6 +483,13 @@ class KnowledgeService {
     const ragApplication = await this.getRagApplication(base)
     return await ragApplication.search(search)
   }
+
+  public rerank = async (
+    _: Electron.IpcMainInvokeEvent,
+    { search, base, results }: { search: string; base: KnowledgeBaseParams; results: ExtractChunkData[] }
+  ): Promise<ExtractChunkData[]> => {
+    return await new Reranker(base).rerank(search, results)
+  }
 }
 
 export default new KnowledgeService()

src/preload/index.d.ts

@@ -90,6 +90,15 @@ declare global {
           base: KnowledgeBaseParams
         }) => Promise<void>
         search: ({ search, base }: { search: string; base: KnowledgeBaseParams }) => Promise<ExtractChunkData[]>
+        rerank: ({
+          search,
+          base,
+          results
+        }: {
+          search: string
+          base: KnowledgeBaseParams
+          results: ExtractChunkData[]
+        }) => Promise<ExtractChunkData[]>
       }
       window: {
         setMinimumSize: (width: number, height: number) => Promise<void>

src/preload/index.ts

@@ -1,4 +1,5 @@
 import { electronAPI } from '@electron-toolkit/preload'
+import type { ExtractChunkData } from '@llm-tools/embedjs-interfaces'
 import { FileType, KnowledgeBaseParams, KnowledgeItem, MCPServer, Shortcut, WebDavConfig } from '@types'
 import { contextBridge, ipcRenderer, OpenDialogOptions, shell } from 'electron'
 
@@ -75,7 +76,9 @@ const api = {
     remove: ({ uniqueId, uniqueIds, base }: { uniqueId: string; uniqueIds: string[]; base: KnowledgeBaseParams }) =>
       ipcRenderer.invoke('knowledge-base:remove', { uniqueId, uniqueIds, base }),
     search: ({ search, base }: { search: string; base: KnowledgeBaseParams }) =>
-      ipcRenderer.invoke('knowledge-base:search', { search, base })
+      ipcRenderer.invoke('knowledge-base:search', { search, base }),
+    rerank: ({ search, base, results }: { search: string; base: KnowledgeBaseParams; results: ExtractChunkData[] }) =>
+      ipcRenderer.invoke('knowledge-base:rerank', { search, base, results })
   },
   window: {
     setMinimumSize: (width: number, height: number) => ipcRenderer.invoke('window:set-minimum-size', width, height),

src/renderer/src/config/models.ts

@@ -176,6 +176,10 @@ export const REASONING_REGEX =
 
 // Embedding models
 export const EMBEDDING_REGEX = /(?:^text-|embed|bge-|e5-|LLM2Vec|retrieval|uae-|gte-|jina-clip|jina-embeddings)/i
+
+// Rerank models
+export const RERANKING_REGEX = /(?:rerank|re-rank|re-ranker|re-ranking|retrieval|retriever)/i
+
 export const NOT_SUPPORTED_REGEX = /(?:^tts|rerank|whisper|speech)/i
 
 // Tool calling models
@@ -1880,6 +1884,13 @@ export function isEmbeddingModel(model: Model): boolean {
   return EMBEDDING_REGEX.test(model.id) || model.type?.includes('embedding') || false
 }
 
+export function isRerankModel(model: Model): boolean {
+  if (!model) {
+    return false
+  }
+  return RERANKING_REGEX.test(model.id) || false
+}
+
 export function isVisionModel(model: Model): boolean {
   if (!model) {
     return false

src/renderer/src/i18n/locales/en-us.json

@@ -362,7 +362,11 @@
       "title": "Knowledge Base",
       "url_added": "URL added",
       "url_placeholder": "Enter URL, multiple URLs separated by Enter",
-      "urls": "URLs"
+      "urls": "URLs",
+      "topN": "Number of results returned",
+      "topN_placeholder": "Not set",
+      "topN__too_large_or_small": "The number of results returned cannot be greater than 100 or less than 1.",
+      "topN_tooltip": "The number of matching results returned; the larger the value, the more matching results, but also the more tokens consumed."
     },
     "languages": {
       "arabic": "Arabic",
@@ -533,7 +537,9 @@
         "function_calling": "Function Calling"
       },
       "vision": "Vision",
-      "websearch": "WebSearch"
+      "websearch": "WebSearch",
+      "rerank_model": "Reordering Model",
+      "rerank_model_tooltip": "Click the Manage button in Settings -> Model Services to add."
     },
     "navbar": {
       "expand": "Expand Dialog",

src/renderer/src/i18n/locales/ja-jp.json

@@ -362,7 +362,11 @@
       "title": "ナレッジベース",
       "url_added": "URLが追加されました",
       "url_placeholder": "URLを入力, 複数のURLはEnterで区切る",
-      "urls": "URL"
+      "urls": "URL",
+      "topN": "返却される結果の数",
+      "topN_placeholder": "未設定",
+      "topN__too_large_or_small": "結果の数は100より大きくてはならず、1より小さくてはなりません。",
+      "topN_tooltip": "返されるマッチ結果の数は、数値が大きいほどマッチ結果が多くなりますが、消費されるトークンも増えます。"
     },
     "languages": {
       "arabic": "アラビア語",
@@ -533,7 +537,9 @@
         "function_calling": "関数呼び出し"
       },
       "vision": "画像",
-      "websearch": "ウェブ検索"
+      "websearch": "ウェブ検索",
+      "rerank_model": "再順序付けモデル",
+      "rerank_model_tooltip": "設定->モデルサービスに移動し、管理ボタンをクリックして追加します。"
     },
     "navbar": {
       "expand": "ダイアログを展開",

src/renderer/src/i18n/locales/ru-ru.json

@@ -362,7 +362,11 @@
       "title": "База знаний",
       "url_added": "URL добавлен",
       "url_placeholder": "Введите URL, несколько URL через Enter",
-      "urls": "URL-адреса"
+      "urls": "URL-адреса",
+      "topN": "Количество возвращаемых результатов",
+      "topN_placeholder": "Не установлено",
+      "topN__too_large_or_small": "Количество возвращаемых результатов не может быть больше 100 или меньше 1.",
+      "topN_tooltip": "Количество возвращаемых совпадений; чем больше значение, тем больше совпадений, но и потребление токенов тоже возрастает."
     },
     "languages": {
       "arabic": "Арабский",
@@ -539,7 +543,9 @@
         "function_calling": "Вызов функции"
       },
       "vision": "Визуальные",
-      "websearch": "Веб-поисковые"
+      "websearch": "Веб-поисковые",
+      "rerank_model": "Модель переупорядочивания",
+      "rerank_model_tooltip": "В настройках -> Служба модели нажмите кнопку \"Управление\", чтобы добавить."
     },
     "navbar": {
       "expand": "Развернуть диалоговое окно",

src/renderer/src/i18n/locales/zh-cn.json

@@ -359,6 +359,10 @@
       "threshold_placeholder": "未设置",
       "threshold_too_large_or_small": "阈值不能大于1或小于0",
       "threshold_tooltip": "用于衡量用户问题与知识库内容之间的相关性（0-1）",
+      "topN": "返回结果数量",
+      "topN_placeholder": "未设置",
+      "topN__too_large_or_small": "返回结果数量不能大于100或小于1",
+      "topN_tooltip": "返回的匹配结果数量，数值越大，匹配结果越多，但消耗的 Token 也越多",
       "title": "知识库",
       "url_added": "网址已添加",
       "url_placeholder": "请输入网址, 多个网址用回车分隔",
@@ -510,6 +514,8 @@
       "embedding": "嵌入",
       "embedding_model": "嵌入模型",
       "embedding_model_tooltip": "在设置->模型服务中点击管理按钮添加",
+      "rerank_model": "重排序模型",
+      "rerank_model_tooltip": "在设置->模型服务中点击管理按钮添加",
       "free": "免费",
       "no_matches": "无可用模型",
       "parameter_name": "参数名称",

src/renderer/src/i18n/locales/zh-tw.json

@@ -362,7 +362,11 @@
       "title": "知識庫",
       "url_added": "網址已新增",
       "url_placeholder": "請輸入網址，多個網址用換行符號分隔",
-      "urls": "網址"
+      "urls": "網址",
+      "topN": "返回結果數量",
+      "topN_placeholder": "未設定",
+      "topN__too_large_or_small": "返回結果數量不能大於100或小於1",
+      "topN_tooltip": "返回的匹配結果數量，數值越大，匹配結果越多，但消耗的 Token 也越多"
     },
     "languages": {
       "arabic": "阿拉伯文",
@@ -533,7 +537,9 @@
         "function_calling": "函數調用"
       },
       "vision": "視覺",
-      "websearch": "網路搜尋"
+      "websearch": "網路搜尋",
+      "rerank_model": "重排序模型",
+      "rerank_model_tooltip": "在設定->模型服務中點擊管理按鈕添加"
     },
     "navbar": {
       "expand": "伸縮對話框",

src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx

@@ -1,5 +1,5 @@
 import { TopView } from '@renderer/components/TopView'
-import { isEmbeddingModel } from '@renderer/config/models'
+import { isEmbeddingModel, isRerankModel } from '@renderer/config/models'
 import { useKnowledgeBases } from '@renderer/hooks/useKnowledge'
 import { useProviders } from '@renderer/hooks/useProvider'
 import AiProvider from '@renderer/providers/AiProvider'
@@ -20,6 +20,7 @@ interface ShowParams {
 interface FormData {
   name: string
   model: string
+  rerankModel: string
 }
 
 interface Props extends ShowParams {
@@ -37,6 +38,11 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
     .map((p) => p.models)
     .flat()
     .filter((model) => isEmbeddingModel(model))
+  const rerankModels = providers
+    .map((p) => p.models)
+    .flat()
+    .filter((model) => isRerankModel(model))
+  console.log('rerankModels', rerankModels)
   const nameInputRef = useRef<any>(null)
 
   const selectOptions = providers
@@ -53,10 +59,25 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
     }))
     .filter((group) => group.options.length > 0)
 
+  const rerankSelectOptions = providers
+    .filter((p) => p.models.length > 0)
+    .map((p) => ({
+      label: p.isSystem ? t(`provider.${p.id}`) : p.name,
+      title: p.name,
+      options: sortBy(p.models, 'name')
+        .filter((model) => isRerankModel(model))
+        .map((m) => ({
+          label: m.name,
+          value: getModelUniqId(m)
+        }))
+    }))
+    .filter((group) => group.options.length > 0)
+
   const onOk = async () => {
     try {
       const values = await form.validateFields()
       const selectedModel = find(allModels, JSON.parse(values.model)) as Model
+      const selectedRerankModel = find(rerankModels, JSON.parse(values.rerankModel)) as Model
 
       if (selectedModel) {
         setLoading(true)
@@ -82,6 +103,7 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
           id: nanoid(),
           name: values.name,
           model: selectedModel,
+          rerankModel: selectedRerankModel,
           dimensions,
           items: [],
           created_at: Date.now(),
@@ -134,6 +156,14 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
           rules={[{ required: true, message: t('message.error.enter.model') }]}>
           <Select style={{ width: '100%' }} options={selectOptions} placeholder={t('settings.models.empty')} />
         </Form.Item>
+
+        <Form.Item
+          name="rerankModel"
+          label={t('models.rerank_model')}
+          tooltip={{ title: t('models.rerank_model_tooltip'), placement: 'right' }}
+          rules={[{ required: false, message: t('message.error.enter.model') }]}>
+          <Select style={{ width: '100%' }} options={rerankSelectOptions} placeholder={t('settings.models.empty')} />
+        </Form.Item>
       </Form>
     </Modal>
   )

src/renderer/src/pages/knowledge/components/KnowledgeSearchPopup.tsx

@@ -41,8 +41,16 @@ const PopupContainer: React.FC<Props> = ({ base, resolve }) => {
         search: value,
         base: getKnowledgeBaseParams(base)
       })
+      let rerankResult = searchResults
+      if (base.rerankModel) {
+        rerankResult = await window.api.knowledgeBase.rerank({
+          search: value,
+          base: getKnowledgeBaseParams(base),
+          results: searchResults
+        })
+      }
       const results = await Promise.all(
-        searchResults.map(async (item) => {
+        rerankResult.map(async (item) => {
           const file = await getFileFromUrl(item.metadata.source)
           return { ...item, file }
         })

src/renderer/src/pages/knowledge/components/KnowledgeSettingsPopup.tsx

@@ -2,7 +2,7 @@ import { WarningOutlined } from '@ant-design/icons'
 import { TopView } from '@renderer/components/TopView'
 import { DEFAULT_KNOWLEDGE_DOCUMENT_COUNT } from '@renderer/config/constant'
 import { getEmbeddingMaxContext } from '@renderer/config/embedings'
-import { isEmbeddingModel } from '@renderer/config/models'
+import { isEmbeddingModel, isRerankModel } from '@renderer/config/models'
 import { useKnowledge } from '@renderer/hooks/useKnowledge'
 import { useProviders } from '@renderer/hooks/useProvider'
 import { getModelUniqId } from '@renderer/services/ModelService'
@@ -23,6 +23,8 @@ interface FormData {
   chunkSize?: number
   chunkOverlap?: number
   threshold?: number
+  rerankModel?: string
+  topN?: number
 }
 
 interface Props extends ShowParams {
@@ -59,6 +61,20 @@ const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
     }))
     .filter((group) => group.options.length > 0)
 
+  const rerankSelectOptions = providers
+    .filter((p) => p.models.length > 0)
+    .map((p) => ({
+      label: p.isSystem ? t(`provider.${p.id}`) : p.name,
+      title: p.name,
+      options: sortBy(p.models, 'name')
+        .filter((model) => isRerankModel(model))
+        .map((m) => ({
+          label: m.name,
+          value: getModelUniqId(m)
+        }))
+    }))
+    .filter((group) => group.options.length > 0)
+
   const onOk = async () => {
     try {
       const values = await form.validateFields()
@@ -68,7 +84,11 @@ const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
         documentCount: values.documentCount || DEFAULT_KNOWLEDGE_DOCUMENT_COUNT,
         chunkSize: values.chunkSize,
         chunkOverlap: values.chunkOverlap,
-        threshold: values.threshold ?? undefined
+        threshold: values.threshold ?? undefined,
+        rerankModel: values.rerankModel
+          ? providers.flatMap((p) => p.models).find((m) => getModelUniqId(m) === values.rerankModel)
+          : undefined,
+        topN: values.topN
       }
       updateKnowledgeBase(newBase)
       setOpen(false)
@@ -116,6 +136,20 @@ const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
           <Select style={{ width: '100%' }} options={selectOptions} placeholder={t('settings.models.empty')} disabled />
         </Form.Item>
 
+        <Form.Item
+          name="rerankModel"
+          label={t('models.rerank_model')}
+          initialValue={getModelUniqId(base.rerankModel)}
+          tooltip={{ title: t('models.rerank_model_tooltip'), placement: 'right' }}
+          rules={[{ required: false, message: t('message.error.enter.model') }]}>
+          <Select
+            style={{ width: '100%' }}
+            options={rerankSelectOptions}
+            placeholder={t('settings.models.empty')}
+            allowClear
+          />
+        </Form.Item>
+
         <Form.Item
           name="documentCount"
           label={t('knowledge.document_count')}
@@ -193,6 +227,22 @@ const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
           ]}>
           <InputNumber placeholder={t('knowledge.threshold_placeholder')} step={0.1} style={{ width: '100%' }} />
         </Form.Item>
+        <Form.Item
+          name="topN"
+          label={t('knowledge.topN')}
+          initialValue={base.topN}
+          rules={[
+            {
+              validator(_, value) {
+                if (value && (value < 0 || value > 10)) {
+                  return Promise.reject(new Error(t('knowledge.topN_too_large_or_small')))
+                }
+                return Promise.resolve()
+              }
+            }
+          ]}>
+          <InputNumber placeholder={t('knowledge.topN_placeholder')} style={{ width: '100%' }} />
+        </Form.Item>
       </Form>
       <Alert message={t('knowledge.chunk_size_change_warning')} type="warning" showIcon icon={<WarningOutlined />} />
     </Modal>

src/renderer/src/services/KnowledgeService.ts

@@ -39,7 +39,10 @@ export const getKnowledgeBaseParams = (base: KnowledgeBase): KnowledgeBaseParams
     apiVersion: provider.apiVersion,
     baseURL: host,
     chunkSize,
-    chunkOverlap: base.chunkOverlap
+    chunkOverlap: base.chunkOverlap,
+    rerankModel: base.rerankModel?.id,
+    rerankModelProvider: base.rerankModel?.provider,
+    topN: base.topN
   }
 }
 
@@ -92,8 +95,17 @@ export const getKnowledgeBaseReference = async (base: KnowledgeBase, message: Me
       })
     )
 
-  const _searchResults = await Promise.all(
-    searchResults.map(async (item) => {
+  let rerankResults = searchResults
+  if (base.rerankModel) {
+    rerankResults = await window.api.knowledgeBase.rerank({
+      search: message.content,
+      base: getKnowledgeBaseParams(base),
+      results: searchResults
+    })
+  }
+
+  const processdResults = await Promise.all(
+    rerankResults.map(async (item) => {
       const file = await getFileFromUrl(item.metadata.source)
       return { ...item, file }
     })
@@ -102,7 +114,7 @@ export const getKnowledgeBaseReference = async (base: KnowledgeBase, message: Me
   const documentCount = base.documentCount || DEFAULT_KNOWLEDGE_DOCUMENT_COUNT
 
   const references = await Promise.all(
-    take(_searchResults, documentCount).map(async (item, index) => {
+    take(processdResults, documentCount).map(async (item, index) => {
       const baseItem = base.items.find((i) => i.uniqueId === item.metadata.uniqueLoaderId)
       return {
         id: index + 1,

src/renderer/src/types/index.ts

@@ -254,6 +254,8 @@ export interface KnowledgeBase {
   chunkSize?: number
   chunkOverlap?: number
   threshold?: number
+  rerankModel?: Model
+  topN?: number
 }
 
 export type KnowledgeBaseParams = {
@@ -265,6 +267,9 @@ export type KnowledgeBaseParams = {
   baseURL: string
   chunkSize?: number
   chunkOverlap?: number
+  rerankModel?: string
+  rerankModelProvider?: string
+  topN?: number
 }
 
 export type GenerateImageParams = {