@neta-art/generation

A lightweight multimodal generation SDK with built-in model presets, model declaration files, and adapter-based provider calls.

Install

npm install @neta-art/generation

Quick start

import { createGenerationClient } from "@neta-art/generation";

const client = createGenerationClient({
  apiKey: process.env.NETA_ROUTER_API_KEY!,
});

const output = await client.generate({
  model: "gpt-image-2",
  content: [
    { type: "text", text: "a cinematic portrait of a robot florist, 35mm film" },
  ],
  parameters: {
    size: "1024x1024",
    quality: "high",
  },
});

console.log(output);

baseUrl defaults to https://router.neta.art. Pass a different endpoint when needed:

const client = createGenerationClient({
  apiKey: process.env.NETA_ROUTER_API_KEY!,
  baseUrl: "https://router.neta.art",
});

Local testing with .env

.env is ignored by Git. Copy .env.example to .env and fill in your router key:

cp .env.example .env

NETA_ROUTER_API_KEY=your_api_key_here

Node.js does not load .env automatically for library code. The example scripts use Node's native --env-file flag through npm scripts:

pnpm example:basic-image
pnpm example:image-editing
pnpm example:text-to-video

You can also call providers through the CLI:

node --env-file=.env ./dist/cli/index.js generate gemini-3.1-flash-image-preview \
  --prompt "a simple abstract geometric app icon" \
  --param aspect_ratio=1:1 \
  --param image_size=512 \
  --debug

Use --image-url for reference images, --out to write base64 outputs to files, and json: for non-string parameter values, for example --param duration=json:5.

Debug provider requests

Pass debug: true to print the final provider request and response metadata to stderr. Sensitive fields such as Authorization and base64 image data are redacted by default.

const client = createGenerationClient({
  apiKey: process.env.NETA_ROUTER_API_KEY!,
  debug: true,
});

For a custom logger or full unredacted payloads:

const client = createGenerationClient({
  apiKey: process.env.NETA_ROUTER_API_KEY!,
  debug: {
    enabled: true,
    includeSensitive: true,
    logger: (event) => console.error(JSON.stringify(event, null, 2)),
  },
});

Built-in models

• gpt-image-2
• gemini-3.1-flash-image-preview
• seedance-2-0
• seedance-2-0-fast

Built-in model declarations share the same client-level apiKey and baseUrl.

Image editing with a reference image

const output = await client.generate({
  model: "gemini-3.1-flash-image-preview",
  content: [
    { type: "text", text: "turn this portrait into a watercolor illustration" },
    { type: "image", source: { type: "url", url: "https://example.com/portrait.jpg" } },
  ],
  parameters: {
    aspect_ratio: "3:4",
    image_size: "2K",
  },
});

Video generation

const output = await client.generate({
  model: "seedance-2-0-fast",
  content: [
    { type: "text", text: "a cat playing piano in a cozy jazz club, cinematic lighting" },
  ],
  parameters: {
    duration: 5,
    resolution: "720p",
    aspect_ratio: "16:9",
  },
});

Frame and reference-image video modes use meta.role:

await client.generate({
  model: "seedance-2-0",
  content: [
    { type: "text", text: "create a smooth dramatic transition" },
    { type: "image", source: { type: "url", url: "https://example.com/start.jpg" }, meta: { role: "first_frame" } },
    { type: "image", source: { type: "url", url: "https://example.com/end.jpg" }, meta: { role: "last_frame" } },
  ],
});

Load model declarations from files

import { createGenerationClientFromDirectory } from "@neta-art/generation";

const client = await createGenerationClientFromDirectory("./models", {
  apiKey: process.env.NETA_ROUTER_API_KEY!,
});

Supported declaration formats:

• .yaml
• .yml
• .json

Custom declarations are merged with built-in models by default. If the same model exists, the custom declaration wins.

Export model declarations

import { exportBuiltinModelConfig } from "@neta-art/generation";

await exportBuiltinModelConfig("gpt-image-2", "./gpt-image-2.yaml");

CLI:

neta-generation models list
neta-generation models export gpt-image-2 --out ./gpt-image-2.yaml
neta-generation models export-all --out ./models

Model declaration schema

schema: neta.generation.model.v1
model: gpt-image-2
title: GPT Image 2
adapter:
  type: openai.images
content:
  input:
    - type: text
      required: true
      min: 1
      max: 16
      merge: newline
    - type: image
      required: false
      max: 16
      sources:
        - url
        - base64
parameters:
  size:
    type: string
    optional: true
    default: 1024x1024

Adapter credentials are intentionally not stored in model declarations. Use client-level or request-level apiKey and baseUrl instead.

Content sources

type GenerationSource =
  | { type: "url"; url: string }
  | { type: "base64"; mediaType: string; data: string };

Adapter types

Built-in adapters:

• openai.images
• gemini.generateContent
• ark.videoGenerations

You can register custom adapters:

const client = createGenerationClient({
  apiKey,
  adapters: {
    "custom.adapter": async (input) => {
      return [];
    },
  },
});

Validation without provider calls

const resolved = client.validate({
  model: "gpt-image-2",
  content: [{ type: "text", text: "hello" }],
});

console.log(resolved.parameters);

Error handling

import { GenerationValidationError, GenerationProviderError } from "@neta-art/generation";

try {
  await client.generate(request);
} catch (error) {
  if (error instanceof GenerationValidationError) {
    console.error("Invalid request", error.message);
  } else if (error instanceof GenerationProviderError) {
    console.error("Provider failed", error.message);
  }
}