{"id":91726,"title":"Nuvi – The AI Agent Builder for Software 3.0","tagline":"Write specs in natural language. Get working agents. It’s that simple.","body":"![uploaded image](/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/7e12281e-7f3b-4f82-b803-dd815931d5c8)\n\n### **TL;DR**\n\nEveryone wants to build AI agents. But doing it right is still way too hard.\n\nYou can build a website with natural language in tools like Lovable. But if you want to build AI agents, you're stuck dragging blocks or writing code.\n\n[**Nuvi**](https://www.nuvi.dev) is the AI agent builder for Software 3.0: Write specs in plain English. Get testable, verifiable behavior — out of the box.\n\n---\n\n## **❌ The Problem**\n\nBuilding AI agents still means building behavior manually — whether you’re writing code, dragging blocks, or tweaking prompts.\n\n* **Tools like n8n** let you create agents without code, but you’re still wiring up logic step by step.\n* **Tools like Cursor** help you code faster, but you still need to know what code to write.\n\nAt the same time, **tools like Lovable have shown what’s possible with natural language** — you can build and launch a polished UI in minutes.\n\nKarpathy called it years ago: _“English is the hottest new programming language.”_ But while we’ve embraced it for websites and weekend projects, there’s still no reliable Lovable for building AI agents.\n\n**Intelligent software still lacks a way to go from natural language to tested, trusted behavior.**\n\nWe need a system where intent becomes implementation — with structure, simulation, and shared understanding built in.\n\n---\n\n## **🎯 The Solution: Nuvi**\n\nNuvi lets anyone define, build, and deploy intelligent agents using natural language — with the **structure and guarantees** of real software development.\n\nWhat makes us different:\n\n🧠 **All in Natural Language**\n\nIf you can explain what you want, Nuvi helps you build it. No coding, no frameworks, no LLM know-how required.\n\n![uploaded image](/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/e8536123-efac-4c99-8924-a3798a077a15)\n\n**🤝 Built for Collaboration**\n\nSpecifications are readable, editable, and versioned — so people across different teams stay aligned.\n\n![uploaded image](/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/2b0f6f88-9d1d-473b-8e76-6e8c3ad190eb)\n\n🧪 **Fully Tested by Default**\n\nUser stories become behavioral tests. You can simulate how your agent behaves _before_ launch — and continuously validate after. Using only language.\n\n![uploaded image](/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/d18df70f-0181-4ec0-83f0-208bab3379aa)\n\n⚙️ **One-Click Deployment**\n\nClick to deploy. Built-in access control and integrations mean you go from idea to agent in minutes.\n\n![uploaded image](/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/7c089cfe-87e5-44c6-9472-e81963a1431f)\n\n---\n\n## **✅ Nuvi Agents at Work**\n\nAgents built with Nuvi are already transforming how real work gets done — here are a few examples:\n\n* A legal SaaS company built a custom BDR agent that scans hundreds of court filings daily, flags high-complexity cases, and drafts tailored outreach directly in HubSpot.\n* A mortgage brokerage built a fulfillment agent that processes messy loan documents, checks them against underwriting rules, and saves hours of manual review on every application.\n* An international nonprofit built an AI coach that interviews underserved small business owners, generates detailed financial forecasts, and dramatically scales personalized support.\n\n---\n\n## **💡Our Secret sauce: Specification-as-Source**\n\nIn his recent AI Startup School keynote, Andrej Karpathy revamped the idea of **Software 3.0** — where we write software using English instead of code.\n\nBut English alone isn’t a programming language. If it were, we wouldn’t have invented C or Python. For English to work as code, it needs structure (but we can now relax how much structure we need). That’s what Nuvi provides.\n\n**🧠 1. AI Specification Assistant**\n\nDescribe the agent in plain English. Nuvi helps you clarify goals, cover edge cases, and remove ambiguity — like a linter for intent.\n\n**🧾 2. Specification-as-Source**\n\nThe spec _is_ the agent’s source code. It’s structured, complete, and readable by both humans and machines.\n\n**⚙️ 3. One-Click Agent Compilation**\n\nWe compile your spec into a live agent. Just like devs once implemented PRDs — but this time, the AI does it.\n\n**🧪 4. Simulation \u0026 Continuous Testing**\n\nUser stories become test cases. You can simulate the agent’s behavior before launch — and verify it keeps working after.\n\nNuvi is the behavioral compiler for Software 3.0. Not another prompt wrapper. Not another no-code toy. Real behavior. From real specs. Written in plain English.\n\n---\n\n## **🙌 Our Ask**\n\n* Try Nuvi and build your first agent — all in plain English.\n* Want to join the mission, collaborate, or write about us? Reach out at [nuvi.dev](https://www.nuvi.dev/)","slug":"NrS-nuvi-the-ai-agent-builder-for-software-3-0","created_at":"2025-06-30T16:10:38.865Z","updated_at":"2026-09-18T18:20:00.890Z","total_vote_count":17,"url":"https://www.ycombinator.com/launches/NrS-nuvi-the-ai-agent-builder-for-software-3-0","share_image_url":"https://www.ycombinator.com/media/?type=post\u0026id=91726\u0026key=user_uploads/983988/7e12281e-7f3b-4f82-b803-dd815931d5c8","company":{"id":29185,"name":"Relari","slug":"relari","url":"https://www.relari.ai/","logo":"https://bookface-images.s3.amazonaws.com/small_logos/d8724ca6da40d81a8aadbd3cf9cf5fbaa58ac997.png","batch":"Winter 2024","industry":"Industrials","tags":["Robotics"],"search_path":"https://bookface.ycombinator.com/company/29185"}}