feat: turbostarter boilerplate

Production-ready Next.js boilerplate with:
- Runtime env validation (fail-fast on missing vars)
- Feature-gated config (S3, Stripe, email, OAuth)
- Docker + Coolify deployment pipeline
- PostgreSQL + pgvector, MinIO S3, Better Auth
- TypeScript strict mode (no ignoreBuildErrors)
- i18n (en/es), AI modules, billing, monitoring

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/ai/src/modules/chat/strategies.ts

@@ -0,0 +1,27 @@
+import { anthropic } from "@ai-sdk/anthropic";
+import { deepseek } from "@ai-sdk/deepseek";
+import { google } from "@ai-sdk/google";
+import { openai } from "@ai-sdk/openai";
+import { xai } from "@ai-sdk/xai";
+import { customProvider } from "ai";
+
+import { cached } from "../../utils/llm";
+
+import { Model } from "./types";
+
+export const modelStrategies = customProvider({
+  languageModels: {
+    [Model.GPT_5_1]: cached(openai.responses("gpt-5.1-chat-latest")),
+    [Model.GPT_4O]: cached(openai.responses("gpt-4o")),
+    [Model.O3]: cached(openai.responses("o3-mini")),
+    [Model.O4_MINI]: cached(openai.responses("o4-mini")),
+    [Model.GEMINI_2_5_PRO]: cached(google("gemini-2.5-pro")),
+    [Model.GEMINI_2_5_FLASH]: cached(google("gemini-2.5-flash")),
+    [Model.CLAUDE_4_SONNET]: cached(anthropic("claude-sonnet-4-5")),
+    [Model.CLAUDE_3_7_SONNET]: cached(anthropic("claude-3-7-sonnet-latest")),
+    [Model.GROK_4]: cached(xai("grok-4")),
+    [Model.GROK_3]: cached(xai("grok-3-mini-fast")),
+    [Model.DEEPSEEK_V3]: cached(deepseek("deepseek-chat")),
+    [Model.DEEPSEEK_R1]: cached(deepseek("deepseek-reasoner")),
+  },
+});