perf(deps): route Cohere & Mistral through OpenAI-compat to cut bundle by 1.8MB (#2402)

Replace ChatCohere / ChatMistralAI / CohereEmbeddings with ChatOpenAI /
OpenAIEmbeddings pointed at each provider's OpenAI-compatible endpoint:

- Cohere: https://api.cohere.ai/compatibility/v1
- Mistral: https://api.mistral.ai/v1 (already OpenAI-shaped)

Dropping @langchain/cohere, @langchain/mistralai, cohere-ai, and
@mistralai/mistralai also eliminates the @aws-sdk/* and @smithy/* chain
that cohere-ai dragged in for Bedrock auth (a path this plugin doesn't use).

Production bundle: 5.21MB -> 3.39MB.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -87,13 +87,11 @@
     "@koa/cors": "^5.0.0",
     "@langchain/anthropic": "^1.0.0",
     "@langchain/classic": "^1.0.9",
-    "@langchain/cohere": "^1.0.0",
     "@langchain/community": "^1.0.0",
     "@langchain/core": "^1.1.29",
     "@langchain/deepseek": "^1.0.0",
     "@langchain/google-genai": "^2.1.23",
     "@langchain/groq": "^1.0.0",
-    "@langchain/mistralai": "^1.0.0",
     "@langchain/openai": "^1.0.0",
     "@langchain/textsplitters": "^1.0.0",
     "@langchain/xai": "^1.0.0",
@@ -125,7 +123,6 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "codemirror-companion-extension": "^0.0.11",
-    "cohere-ai": "^7.13.0",
     "crypto-js": "^4.1.1",
     "diff": "^7.0.0",
     "esbuild-plugin-svg": "^0.1.0",

src/LLMProviders/chatModelManager.ts

@@ -27,13 +27,11 @@ import {
 } from "@/utils";
 import { HarmBlockThreshold, HarmCategory } from "@google/generative-ai";
 import { ChatAnthropic } from "@langchain/anthropic";
-import { ChatCohere } from "@langchain/cohere";
 import { BaseChatModel } from "@langchain/core/language_models/chat_models";
 import { BaseLanguageModel } from "@langchain/core/language_models/base";
 import { ChatDeepSeek } from "@langchain/deepseek";
 import { ChatGoogleGenerativeAI } from "@langchain/google-genai";
 import { ChatGroq } from "@langchain/groq";
-import { ChatMistralAI } from "@langchain/mistralai";
 import { ChatOllama } from "@langchain/ollama";
 import { ChatOpenAI } from "@langchain/openai";
 import { ChatXAI } from "@langchain/xai";
@@ -68,7 +66,7 @@ const CHAT_PROVIDER_CONSTRUCTORS = {
   [ChatModelProviders.OPENAI]: ChatOpenAI,
   [ChatModelProviders.AZURE_OPENAI]: ChatOpenAI,
   [ChatModelProviders.ANTHROPIC]: ChatAnthropic,
-  [ChatModelProviders.COHEREAI]: ChatCohere,
+  [ChatModelProviders.COHEREAI]: ChatOpenAI,
   [ChatModelProviders.GOOGLE]: ChatGoogleGenerativeAI,
   [ChatModelProviders.XAI]: ChatXAI,
   [ChatModelProviders.OPENROUTERAI]: ChatOpenRouter,
@@ -78,7 +76,7 @@ const CHAT_PROVIDER_CONSTRUCTORS = {
   [ChatModelProviders.OPENAI_FORMAT]: ChatOpenAI,
   [ChatModelProviders.SILICONFLOW]: ChatOpenAI,
   [ChatModelProviders.COPILOT_PLUS]: ChatOpenRouter,
-  [ChatModelProviders.MISTRAL]: ChatMistralAI,
+  [ChatModelProviders.MISTRAL]: ChatOpenAI,
   [ChatModelProviders.DEEPSEEK]: ChatDeepSeek,
   [ChatModelProviders.AMAZON_BEDROCK]: BedrockChatModel,
   [ChatModelProviders.GITHUB_COPILOT]: GitHubCopilotChatModel,
@@ -281,8 +279,12 @@ export default class ChatModelManager {
         };
       })(),
       [ChatModelProviders.COHEREAI]: {
+        modelName,
         apiKey: await getDecryptedKey(customModel.apiKey || settings.cohereApiKey),
-        model: modelName,
+        configuration: {
+          baseURL: customModel.baseUrl || ProviderInfo[ChatModelProviders.COHEREAI].host,
+          fetch: customModel.enableCors ? safeFetch : undefined,
+        },
       },
       [ChatModelProviders.GOOGLE]: {
         apiKey: await getDecryptedKey(customModel.apiKey || settings.googleApiKey),
@@ -412,9 +414,12 @@ export default class ChatModelManager {
         },
       },
       [ChatModelProviders.MISTRAL]: {
-        model: modelName,
+        modelName,
         apiKey: await getDecryptedKey(customModel.apiKey || settings.mistralApiKey),
-        serverURL: customModel.baseUrl,
+        configuration: {
+          baseURL: customModel.baseUrl || ProviderInfo[ChatModelProviders.MISTRAL].host,
+          fetch: customModel.enableCors ? safeFetch : undefined,
+        },
       },
       [ChatModelProviders.DEEPSEEK]: {
         modelName: modelName,

src/LLMProviders/embeddingManager.ts

@@ -5,7 +5,6 @@ import { getDecryptedKey } from "@/encryptionService";
 import { CustomError } from "@/error";
 import { getModelKeyFromModel, getSettings, subscribeToSettingsChange } from "@/settings/model";
 import { err2String, safeFetch } from "@/utils";
-import { CohereEmbeddings } from "@langchain/cohere";
 import { Embeddings } from "@langchain/core/embeddings";
 import { GoogleGenerativeAIEmbeddings } from "@langchain/google-genai";
 import { OllamaEmbeddings } from "@langchain/ollama";
@@ -21,7 +20,7 @@ const EMBEDDING_PROVIDER_CONSTRUCTORS = {
   [EmbeddingModelProviders.COPILOT_PLUS]: CustomOpenAIEmbeddings,
   [EmbeddingModelProviders.COPILOT_PLUS_JINA]: CustomJinaEmbeddings,
   [EmbeddingModelProviders.OPENAI]: OpenAIEmbeddings,
-  [EmbeddingModelProviders.COHEREAI]: CohereEmbeddings,
+  [EmbeddingModelProviders.COHEREAI]: OpenAIEmbeddings,
   [EmbeddingModelProviders.GOOGLE]: GoogleGenerativeAIEmbeddings,
   [EmbeddingModelProviders.AZURE_OPENAI]: AzureOpenAIEmbeddings,
   [EmbeddingModelProviders.OLLAMA]: OllamaEmbeddings,
@@ -241,8 +240,14 @@ export default class EmbeddingManager {
         },
       },
       [EmbeddingModelProviders.COHEREAI]: {
-        model: modelName,
+        modelName,
         apiKey: await getDecryptedKey(customModel.apiKey || settings.cohereApiKey),
+        timeout: 10000,
+        batchSize: getSettings().embeddingBatchSize,
+        configuration: {
+          baseURL: customModel.baseUrl || ProviderInfo[EmbeddingModelProviders.COHEREAI].host,
+          fetch: customModel.enableCors ? safeFetch : undefined,
+        },
       },
       [EmbeddingModelProviders.GOOGLE]: {
         modelName: modelName,

src/constants.ts

@@ -662,8 +662,8 @@ export const ProviderInfo: Record<Provider, ProviderMetadata> = {
   },
   [ChatModelProviders.COHEREAI]: {
     label: "Cohere",
-    host: "https://api.cohere.com",
-    curlBaseURL: "https://api.cohere.com/v1",
+    host: "https://api.cohere.ai/compatibility/v1",
+    curlBaseURL: "https://api.cohere.ai/compatibility/v1",
     keyManagementURL: "https://dashboard.cohere.ai/api-keys",
     listModelURL: "https://api.cohere.com/v1/models",
     testModel: ChatModels.COMMAND_R,