@neboai/app-sdk

SDK for building Nebo apps. Mirrors native browser APIs (fetch, WebSocket, localStorage) while adding agent invocation, LLM completions, and real-time state management.

Install

pnpm add @neboai/app-sdk

Or use the global build via CDN:

<script src="https://unpkg.com/@neboai/app-sdk/dist/nebo.global.js"></script>

Quick Start

import { nebo } from '@neboai/app-sdk';

// Fetch from your sidecar (relative) or external APIs (absolute, CORS-free)
const data = await nebo.fetch('/deals').then(r => r.json());
const weather = await nebo.fetch('https://api.weather.gov/points/40,-74').then(r => r.json());

// Persistent key-value storage
await nebo.storage.setItem('lastSync', Date.now());
const val = await nebo.storage.getItem('lastSync');

// Invoke the agent
const { text } = await nebo.agents.invoke('Summarize my deals');

// Stream agent responses
for await (const chunk of nebo.agents.stream('Analyze this quarter')) {
  console.log(chunk.text);
}

// Direct LLM call (no persona)
const answer = await nebo.janus.complete({
  messages: [{ role: 'user', content: 'What is 2+2?' }],
});

// Embed chat panel
nebo.chat.mount(document.getElementById('chat'), {
  placeholder: 'Ask about your deals...',
  theme: 'dark',
});

// Listen for agent-pushed state
nebo.surfaces.connect();
nebo.surfaces.on('state_snapshot', (e) => {
  appState = e.snapshot;
  render();
});

API Reference

nebo.fetch(input, init?)

Auto-routed fetch. Relative URLs go to your sidecar. Absolute URLs go through Nebo's CORS-free proxy.

nebo.WebSocket(path?)

Auto-reconnecting WebSocket with exponential backoff (1s–30s).

nebo.storage

Server-persisted async key-value store: getItem, setItem, removeItem, clear, keys.

nebo.agents

• invoke(message, options?) — One-shot agent call, returns { text, tools? }
• stream(message, options?) — Streaming agent call, yields { text, done }

nebo.janus

• complete(options) — Direct LLM completion
• stream(options) — Streaming LLM completion

nebo.chat

• mount(element, options?) — Embed chat UI
• unmount() — Remove chat UI
• send(message) — Programmatically send a message
• onMessage(handler) — Listen for chat events
• setContext(context) — Update app context for the agent
• newThread() — Start a new conversation

nebo.surfaces

Real-time agent-to-app event system with typed events:

• connect() / disconnect()
• on(type, handler) — Subscribe to events (returns unsubscribe fn)
• send(name, payload?) — Send action to agent
• requestState() — Request full state snapshot

Events: run_started, run_finished, run_error, text_start, text_content, text_end, tool_call_start, tool_call_end, state_snapshot, state_delta, surface_create, surface_update, surface_delete, data_update, custom.

nebo.identity

• get() — Returns agent metadata (id, name, skills, model, etc.)
• invalidate() — Clear cached identity

nebo.a2ui

A2UI v0.9 message bridge for agent-driven UI components.

• init(processor) — Initialize with @a2ui/web_core MessageProcessor
• sendAction(surfaceId, action) — Send UI action to agent
• sendError(surfaceId, code, message) — Report error to agent

nebo.configure(options)

Set appId and baseUrl manually (auto-detected by default).

Formats

Format	File	Use
ESM	dist/index.js	import { nebo } from '@neboai/app-sdk'
CJS	dist/index.cjs	const { nebo } = require('@neboai/app-sdk')
IIFE	dist/nebo.global.js	<script> tag — exposes window.NeboAppSDK

License

MIT