feat(templates): add .cursor/rules/echo_rules.mdc to all echo-start templates

Add template-specific cursor rules to all 11 templates:
assistant-ui, authjs, echo-cli, next-chat, next-image,
next-video-template, next, nextjs-api-key-template,
react-chat, react-image, react

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: CharlesWong

packages/sdk/ts/src/supported-models/video/gemini.ts

@@ -2,9 +2,23 @@ import { SupportedVideoModel } from 'supported-models/types';
 
 export type GeminiVideoModel =
   | 'veo-3.0-generate-001'
-  | 'veo-3.0-fast-generate-001';
+  | 'veo-3.0-fast-generate-001'
+  | 'veo-3.1-generate-preview'
+  | 'veo-3.1-fast-generate-preview';
 // https://ai.google.dev/gemini-api/docs/pricing
 export const GeminiVideoModels: SupportedVideoModel[] = [
+  {
+    model_id: 'veo-3.1-generate-preview',
+    cost_per_second_with_audio: 0.4,
+    cost_per_second_without_audio: 0.2,
+    provider: 'Gemini',
+  },
+  {
+    model_id: 'veo-3.1-fast-generate-preview',
+    cost_per_second_with_audio: 0.15,
+    cost_per_second_without_audio: 0.1,
+    provider: 'Gemini',
+  },
   {
     model_id: 'veo-3.0-generate-001',
     cost_per_second_with_audio: 0.4,

templates/next-video-template/src/app/api/generate-video/validation.ts

@@ -35,10 +35,10 @@ export function validateGenerateVideoRequest(body: unknown): ValidationResult {
   }
 
   const validModels: VideoModelOption[] = [
-    'veo-3.0-fast-generate-preview',
-    'veo-3.0-generate-preview',
     'veo-3.1-generate-preview',
     'veo-3.1-fast-generate-preview',
+    'veo-3.0-fast-generate-preview',
+    'veo-3.0-generate-preview',
   ];
   if (!model || !validModels.includes(model as VideoModelOption)) {
     return {

templates/next-video-template/src/app/api/generate-video/vertex.ts

@@ -4,6 +4,7 @@
 
 import { getEchoToken } from '@/echo';
 import { ERROR_MESSAGES } from '@/lib/constants';
+import { VideoModelOption } from '@/lib/types';
 import {
   GenerateVideosOperation,
   GenerateVideosParameters,
@@ -14,7 +15,7 @@ import {
  */
 export async function handleGeminiGenerate(
   prompt: string,
-  model: 'veo-3.0-fast-generate-preview' | 'veo-3.0-generate-preview' | 'veo-3.1-generate-preview' | 'veo-3.1-fast-generate-preview',
+  model: VideoModelOption,
   durationSeconds: number = 4,
   generateAudio: boolean = false,
   image?: string, // Base64 encoded image or data URL (first frame)

templates/next-video-template/src/components/video-generator.tsx

@@ -42,10 +42,10 @@ import { FileInputManager } from './FileInputManager';
 import { VideoHistory } from './video-history';
 
 const models: VideoModelConfig[] = [
-  { id: 'veo-3.0-fast-generate-preview', name: 'Veo 3 Fast' },
-  { id: 'veo-3.0-generate-preview', name: 'Veo 3' },
   { id: 'veo-3.1-generate-preview', name: 'Veo 3.1' },
   { id: 'veo-3.1-fast-generate-preview', name: 'Veo 3.1 Fast' },
+  { id: 'veo-3.0-fast-generate-preview', name: 'Veo 3 Fast' },
+  { id: 'veo-3.0-generate-preview', name: 'Veo 3' },
 ];
 
 /**

templates/next-video-template/src/lib/types.ts

@@ -14,10 +14,10 @@ export type ModelOption = 'openai' | 'gemini';
  * Available AI models for video generation
  */
 export type VideoModelOption =
-  | 'veo-3.0-fast-generate-preview'
-  | 'veo-3.0-generate-preview'
   | 'veo-3.1-generate-preview'
-  | 'veo-3.1-fast-generate-preview';
+  | 'veo-3.1-fast-generate-preview'
+  | 'veo-3.0-fast-generate-preview'
+  | 'veo-3.0-generate-preview';
 
 /**
  * Model configuration with display names