🌊 Lowdeep

The fluent, resilient, and 100% Type-Safe AI SDK.

Lowdeep is a minimalist library designed for developers who are tired of dealing with unpredictable LLM responses. It transforms chaotic text into structured, validated data using a Self-Healing mechanism that learns from validation errors in real-time.

✨ Key Features

• Fluent API: Configure your model with a natural, chainable writing experience.
• Type-Level State Machine: Our builder pattern uses advanced TypeScript generics to guide you. You physically cannot call .chat() until the API key, provider, and model are correctly configured.
• Native Zod Integration: Define your response contract once and let Lowdeep handle the validation.
• Self-Healing Logic: If the AI fails to follow your schema, Lowdeep injects the specific validation error back into the conversation history and intelligently retries.

🚀 Installation

bun add lowdeep zod openai
# or
npm install lowdeep zod openai

🛠️ Usage

The Basics

Simple text-based completion with state validation.

import lowdeep from "lowdeep";

const res = await lowdeep()
  .key(process.env.API_KEY)
  .provider("groq")
  .model("llama3-70b-8192")
  .chat("What is the capital of Japan?");

console.log(res.content); // "Tokyo"

Structured Output with Self-Healing

Lowdeep uses your Zod schema to guide the AI. If the validation fails, it performs automatic retries by explaining exactly what went wrong to the model.

import { z } from "zod";
import lowdeep from "lowdeep";

const CharacterSchema = z.object({
  name: z.string(),
  class: z.enum(["Warrior", "Mage", "Rogue"]),
  stats: z.object({
    strength: z.number(),
    intelligence: z.number(),
  }),
});

const ai = lowdeep().key("your_api_key").provider("openai").model("gpt-4o");

const hero = await ai
  .schema(CharacterSchema) // Enables automatic typing & JSON Mode
  .retry(3) // Auto-corrects up to 3 times on validation failure
  .chat("Generate a random RPG character.");

// Full Autocomplete support!
console.log(hero.name, hero.class, hero.stats.strength);

🧠 Under the Hood

1. The Type Guardian

Lowdeep implements a Type-Level State Machine. The chat() method only becomes available in your IDE's autocomplete once the internal state confirms that all mandatory requirements (Key, Provider, Model) are met.

2. The Feedback Loop

When a schema is provided, Lowdeep initiates a resilience cycle:

1. Injection: It injects the JSON Schema into the System Prompt.
2. Validation: It parses the response and validates it against Zod.
3. Correction: On failure, it captures the detailed Zod error and tells the AI: "Your last response was invalid: [Specific Error]. Please fix it."
4. Persistence: It repeats until success or the retry limit is reached.

🛠️ Supported Providers

Lowdeep works with any provider compatible with the OpenAI API specification:

• OpenAI
• Groq
• DeepInfra

📄 License

MIT. Build something amazing.