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>

.context/turbostarter-framework-context/sections/ai/docs/anthropic.md

@@ -0,0 +1,104 @@
+---
+title: Anthropic
+description: Setup Anthropic provider and learn how to use it in the starter kit.
+url: /ai/docs/anthropic
+---
+
+# Anthropic
+
+The [Anthropic](https://www.anthropic.com) provider integrates Anthropic's powerful Claude models into your application through the AI SDK, with an emphasis on safety, helpfulness, and natural interactions.
+
+![Anthropic](/images/docs/ai/providers/anthropic.png)
+
+## Setup
+
+<Steps>
+  <Step>
+    ### Generate API Key
+
+    Visit the [Anthropic Console](https://console.anthropic.com/) to create an account and generate a new API key for your project.
+  </Step>
+
+  <Step>
+    ### Add API Key to Environment
+
+    Add your generated API key to your project's `.env` file (e.g., in `apps/web`):
+
+    ```bash title=".env"
+    ANTHROPIC_API_KEY=your-api-key
+    ```
+  </Step>
+
+  <Step>
+    ### Configure Provider (Optional)
+
+    The starter kit automatically uses the `ANTHROPIC_API_KEY` environment variable. For advanced configurations (such as proxies or custom headers), refer to the [AI SDK Anthropic documentation](https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#provider-instance).
+  </Step>
+</Steps>
+
+## Features
+
+<Cards>
+  <Card title="Language Models" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#language-models">
+    Leverage Anthropic's state-of-the-art Claude models for sophisticated
+    conversational AI, creative text generation, in-depth analysis, and more
+    through the intuitive Messages API.
+  </Card>
+
+  <Card title="Image Input / Vision" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#image-input">
+    Enable models to understand and process image inputs alongside text for
+    multimodal applications.
+  </Card>
+
+  <Card title="Tool Usage / Function Calling" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#tool-usage">
+    Allow models to interact with external tools and APIs to perform actions and
+    retrieve real-time information.
+  </Card>
+
+  <Card title="Object Generation" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#object-generation">
+    Create structured data outputs (like JSON) from natural language prompts,
+    streamlining the integration of AI capabilities with your existing systems.
+  </Card>
+
+  <Card title="Reasoning" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#reasoning">
+    Access detailed insights into the model's thought process, enhancing
+    transparency, debuggability, and trust in AI-generated responses.
+  </Card>
+
+  <Card title="Computer Use" href="https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic#computer-use">
+    (Experimental) Allow models to directly interact with computer desktop
+    environments to complete complex, multi-step tasks autonomously.
+  </Card>
+</Cards>
+
+## Use Cases
+
+<Cards>
+  <Card title="AI Chatbot">
+    Craft intelligent, context-aware chatbots capable of nuanced conversations
+    and sophisticated task completion. Experience this capability in our [Chat
+    Demo](/ai/docs/chat).
+  </Card>
+
+  <Card title="Content Generation & Summarization">
+    Generate high-quality text for various purposes, or summarize long documents
+    and conversations accurately.
+  </Card>
+
+  <Card title="Data Extraction & Analysis">
+    Extract structured information from unstructured text or analyze complex
+    data sets combined with visual inputs for comprehensive insights.
+  </Card>
+
+  <Card title="Automated Workflows">
+    Seamlessly integrate Claude models with your existing tools via function
+    calling to automate complex business processes and tasks. Explore
+    [Agents](/ai/docs/agents) for advanced implementation options.
+  </Card>
+</Cards>
+
+## Links
+
+* [Anthropic Website](https://www.anthropic.com)
+* [Anthropic Documentation](https://docs.anthropic.com)
+* [AI SDK - Anthropic Provider Docs](https://sdk.vercel.ai/providers/ai-sdk-providers/anthropic)