Notes

Memory that survives a reload: three tools over localStorage.

Try it live → — load a model once in the demo, then ask one of the questions below.

What it shows

save_note, list_notes and read_note give the model a small persistent store. Save a note, reload the page, and ask for it back — the model forgot the conversation, the tools did not.

The tools file

Saved in this browser only. Save a note, reload the page, and ask for it back.

// Notes kept in localStorage: the model's memory outlives the page.

const KEY = 'nexus-demo-notes';
const load = () => JSON.parse(localStorage.getItem(KEY) || '{}');
const store = (notes) => localStorage.setItem(KEY, JSON.stringify(notes));

tool('save_note', 'Save a note under a title. A note with the same title is replaced.',
  { title: 'string', text: 'string' },
  async ({ title, text }) => {
    const notes = load();
    notes[String(title).toLowerCase()] = String(text);
    store(notes);
    return { saved: title };
  });

tool('list_notes', 'List the titles of all saved notes.',
  {},
  async () => ({ titles: Object.keys(load()) }));

tool('read_note', 'Read a saved note by its title.',
  { title: 'string' },
  async ({ title }) => {
    const text = load()[String(title).toLowerCase()];
    return text == null ? { error: 'no note titled ' + title } : { title, text };
  });

Each tool(name, description, params, handler) is one callable. The file is plain JavaScript, not a module — no imports, no build step, and the demo lets you edit it and apply it live.

Wire it up

import { NexusChat } from 'toolnexus-web';

// loadForTools checks the model can really call a tool before handing it over.
const chat = await NexusChat.loadForTools({ hub: 'onnx-community/Qwen3-0.6B-ONNX' });
await chat.loadTools('./tools.js');   // the file above, saved as tools.js

chat.on('token', (t) => render(t));
chat.on('toolCall', (call, result) => console.log(call.name, result));

const answer = await chat.chat("Save a note titled groceries: milk, eggs, rice.");

Questions to try

• Save a note titled groceries: milk, eggs, rice.
• What notes have I saved?
• What is in my groceries note?

What to expect

Not measured by the harness yet. Saving works best with the title and text spelled out in the question (“Save a note titled groceries: milk, eggs, rice”).

Going further

Swap localStorage for IndexedDB for larger data, or for your own API to sync across devices. Notes stay in this browser only; “Delete everything” in the demo removes them.