feat(core): add optionalModels field in AiPrompt and support the front-end modelId param (#12224)

Close [AI-116](https://linear.app/affine-design/issue/AI-116)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Added support for specifying alternative AI models in chat prompts, enabling users to select from multiple available models.
  - Expanded AI model options with new additions: 'gpt-4.1', 'o3', and 'claude-3-5-sonnet-20241022'.

- **Enhancements**
  - Users can now optionally choose a specific AI model during chat interactions.
  - Prompts and chat sessions reflect and support selection of alternative models where applicable.

- **Bug Fixes**
  - Improved handling of prompt configuration defaults for better reliability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/controller.ts

@@ -62,7 +62,7 @@ export interface ChatEvent {
 }
 
 type CheckResult = {
-  model: string | undefined;
+  model: string;
   hasAttachment?: boolean;
 };
 
@@ -94,7 +94,8 @@ export class CopilotController implements BeforeApplicationShutdown {
   private async checkRequest(
     userId: string,
     sessionId: string,
-    messageId?: string
+    messageId?: string,
+    modelId?: string
   ): Promise<CheckResult> {
     await this.chatSession.checkQuota(userId);
     const session = await this.chatSession.get(sessionId);
@@ -102,7 +103,13 @@ export class CopilotController implements BeforeApplicationShutdown {
       throw new CopilotSessionNotFound();
     }
 
-    const ret: CheckResult = { model: session.model };
+    const ret: CheckResult = {
+      model: session.model,
+    };
+
+    if (modelId && session.optionalModels.includes(modelId)) {
+      ret.model = modelId;
+    }
 
     if (messageId && typeof messageId === 'string') {
       const message = await session.getMessageById(messageId);
@@ -116,13 +123,16 @@ export class CopilotController implements BeforeApplicationShutdown {
   private async chooseTextProvider(
     userId: string,
     sessionId: string,
-    messageId?: string
-  ): Promise<CopilotTextProvider> {
+    messageId?: string,
+    modelId?: string
+  ): Promise<{ provider: CopilotTextProvider; model: string }> {
     const { hasAttachment, model } = await this.checkRequest(
       userId,
       sessionId,
-      messageId
+      messageId,
+      modelId
     );
+
     let provider = await this.provider.getProviderByCapability(
       CopilotCapability.TextToText,
       { model }
@@ -138,7 +148,7 @@ export class CopilotController implements BeforeApplicationShutdown {
       throw new NoCopilotProviderAvailable();
     }
 
-    return provider;
+    return { provider, model };
   }
 
   private async appendSessionMessage(
@@ -182,13 +192,17 @@ export class CopilotController implements BeforeApplicationShutdown {
     const webSearch = Array.isArray(params.webSearch)
       ? Boolean(params.webSearch[0])
       : Boolean(params.webSearch);
+    const modelId = Array.isArray(params.modelId)
+      ? params.modelId[0]
+      : params.modelId;
 
     delete params.messageId;
     delete params.retry;
     delete params.reasoning;
     delete params.webSearch;
+    delete params.modelId;
 
-    return { messageId, retry, reasoning, webSearch, params };
+    return { messageId, retry, reasoning, webSearch, modelId, params };
   }
 
   private getSignal(req: Request) {
@@ -236,13 +250,14 @@ export class CopilotController implements BeforeApplicationShutdown {
     const info: any = { sessionId, params };
 
     try {
-      const { messageId, retry, reasoning, webSearch } =
+      const { messageId, retry, reasoning, webSearch, modelId } =
         this.prepareParams(params);
 
-      const provider = await this.chooseTextProvider(
+      const { provider, model } = await this.chooseTextProvider(
         user.id,
         sessionId,
-        messageId
+        messageId,
+        modelId
       );
 
       const [latestMessage, session] = await this.appendSessionMessage(
@@ -251,8 +266,8 @@ export class CopilotController implements BeforeApplicationShutdown {
         retry
       );
 
-      info.model = session.model;
-      metrics.ai.counter('chat_calls').add(1, { model: session.model });
+      info.model = model;
+      metrics.ai.counter('chat_calls').add(1, { model });
 
       if (latestMessage) {
         params = Object.assign({}, params, latestMessage.params, {
@@ -264,7 +279,7 @@ export class CopilotController implements BeforeApplicationShutdown {
       const finalMessage = session.finish(params);
       info.finalMessage = finalMessage.filter(m => m.role !== 'system');
 
-      const content = await provider.generateText(finalMessage, session.model, {
+      const content = await provider.generateText(finalMessage, model, {
         ...session.config.promptConfig,
         signal: this.getSignal(req),
         user: user.id,
@@ -302,13 +317,14 @@ export class CopilotController implements BeforeApplicationShutdown {
     const info: any = { sessionId, params, throwInStream: false };
 
     try {
-      const { messageId, retry, reasoning, webSearch } =
+      const { messageId, retry, reasoning, webSearch, modelId } =
         this.prepareParams(params);
 
-      const provider = await this.chooseTextProvider(
+      const { provider, model } = await this.chooseTextProvider(
         user.id,
         sessionId,
-        messageId
+        messageId,
+        modelId
       );
 
       const [latestMessage, session] = await this.appendSessionMessage(
@@ -317,8 +333,8 @@ export class CopilotController implements BeforeApplicationShutdown {
         retry
       );
 
-      info.model = session.model;
-      metrics.ai.counter('chat_stream_calls').add(1, { model: session.model });
+      info.model = model;
+      metrics.ai.counter('chat_stream_calls').add(1, { model });
 
       if (latestMessage) {
         params = Object.assign({}, params, latestMessage.params, {
@@ -332,7 +348,7 @@ export class CopilotController implements BeforeApplicationShutdown {
       info.finalMessage = finalMessage.filter(m => m.role !== 'system');
 
       const source$ = from(
-        provider.generateTextStream(finalMessage, session.model, {
+        provider.generateTextStream(finalMessage, model, {
           ...session.config.promptConfig,
           signal: this.getSignal(req),
           user: user.id,

packages/backend/server/src/plugins/copilot/prompt/chat-prompt.ts

@@ -41,6 +41,7 @@ export class ChatPrompt {
       options.name,
       options.action || undefined,
       options.model,
+      options.optionalModels,
       options.config,
       options.messages
     );
@@ -50,6 +51,7 @@ export class ChatPrompt {
     public readonly name: string,
     public readonly action: string | undefined,
     public readonly model: string,
+    public readonly optionalModels: string[],
     public readonly config: PromptConfig | undefined,
     private readonly messages: PromptMessage[]
   ) {

packages/backend/server/src/plugins/copilot/prompt/prompts.ts

@@ -5,8 +5,15 @@ import { PromptConfig, PromptMessage } from '../providers';
 
 type Prompt = Omit<
   AiPrompt,
-  'id' | 'createdAt' | 'updatedAt' | 'modified' | 'action' | 'config'
+  | 'id'
+  | 'createdAt'
+  | 'updatedAt'
+  | 'modified'
+  | 'action'
+  | 'config'
+  | 'optionalModels'
 > & {
+  optionalModels?: string[];
   action?: string;
   messages: PromptMessage[];
   config?: PromptConfig;
@@ -1037,7 +1044,13 @@ Finally, please only send us the content of your continuation in Markdown Format
 const chat: Prompt[] = [
   {
     name: 'Chat With AFFiNE AI',
-    model: 'o4-mini',
+    model: 'gpt-4.1',
+    optionalModels: [
+      'o3',
+      'o4-mini',
+      'claude-3-7-sonnet-20250219',
+      'claude-3-5-sonnet-20241022',
+    ],
     messages: [
       {
         role: 'system',
@@ -1161,14 +1174,15 @@ export async function refreshPrompts(db: PrismaClient) {
       create: {
         name: prompt.name,
         action: prompt.action,
-        config: prompt.config || undefined,
+        config: prompt.config ?? undefined,
         model: prompt.model,
+        optionalModels: prompt.optionalModels,
         messages: {
           create: prompt.messages.map((message, idx) => ({
             idx,
             role: message.role,
             content: message.content,
-            params: message.params || undefined,
+            params: message.params ?? undefined,
           })),
         },
       },
@@ -1177,6 +1191,7 @@ export async function refreshPrompts(db: PrismaClient) {
         action: prompt.action,
         config: prompt.config ?? undefined,
         model: prompt.model,
+        optionalModels: prompt.optionalModels,
         updatedAt: new Date(),
         messages: {
           deleteMany: {},
@@ -1184,7 +1199,7 @@ export async function refreshPrompts(db: PrismaClient) {
             idx,
             role: message.role,
             content: message.content,
-            params: message.params || undefined,
+            params: message.params ?? undefined,
           })),
         },
       },

packages/backend/server/src/plugins/copilot/prompt/service.ts

@@ -64,6 +64,7 @@ export class PromptService implements OnApplicationBootstrap {
         name: true,
         action: true,
         model: true,
+        optionalModels: true,
         config: true,
         messages: {
           select: {

packages/backend/server/src/plugins/copilot/providers/anthropic.ts

@@ -34,7 +34,10 @@ export class AnthropicProvider
 {
   override readonly type = CopilotProviderType.Anthropic;
   override readonly capabilities = [CopilotCapability.TextToText];
-  override readonly models = ['claude-3-7-sonnet-20250219'];
+  override readonly models = [
+    'claude-3-7-sonnet-20250219',
+    'claude-3-5-sonnet-20241022',
+  ];
 
   private readonly MAX_STEPS = 20;
 

packages/backend/server/src/plugins/copilot/providers/openai.ts

@@ -74,6 +74,7 @@ export class OpenAIProvider
     'gpt-4.1-2025-04-14',
     'gpt-4.1-mini',
     'o1',
+    'o3',
     'o4-mini',
     // embeddings
     'text-embedding-3-large',

packages/backend/server/src/plugins/copilot/providers/types.ts

@@ -110,12 +110,12 @@ export type CopilotImageOptions = z.infer<typeof CopilotImageOptionsSchema>;
 export interface CopilotTextToTextProvider extends CopilotProvider {
   generateText(
     messages: PromptMessage[],
-    model?: string,
+    model: string,
     options?: CopilotChatOptions
   ): Promise<string>;
   generateTextStream(
     messages: PromptMessage[],
-    model?: string,
+    model: string,
     options?: CopilotChatOptions
   ): AsyncIterable<string>;
 }
@@ -136,7 +136,7 @@ export interface CopilotTextToImageProvider extends CopilotProvider {
   ): Promise<Array<string>>;
   generateImagesStream(
     messages: PromptMessage[],
-    model?: string,
+    model: string,
     options?: CopilotImageOptions
   ): AsyncIterable<string>;
 }
@@ -145,12 +145,12 @@ export interface CopilotImageToTextProvider extends CopilotProvider {
   generateText(
     messages: PromptMessage[],
     model: string,
-    options?: CopilotChatOptions
+    options: CopilotChatOptions
   ): Promise<string>;
   generateTextStream(
     messages: PromptMessage[],
     model: string,
-    options?: CopilotChatOptions
+    options: CopilotChatOptions
   ): AsyncIterable<string>;
 }
 
@@ -162,7 +162,7 @@ export interface CopilotImageToImageProvider extends CopilotProvider {
   ): Promise<Array<string>>;
   generateImagesStream(
     messages: PromptMessage[],
-    model?: string,
+    model: string,
     options?: CopilotImageOptions
   ): AsyncIterable<string>;
 }

packages/backend/server/src/plugins/copilot/session.ts

@@ -45,6 +45,10 @@ export class ChatSession implements AsyncDisposable {
     return this.state.prompt.model;
   }
 
+  get optionalModels() {
+    return this.state.prompt.optionalModels;
+  }
+
   get config() {
     const {
       sessionId,