kongruity app

kongruity employs Large Language Model ("LLM") semantic grouping functionality to cluster large volumes of "to dos" or issue tags in development (or other) settings, according to thematic or topical similarity.

(To learn more about this topic, see, e.g., Kozlowski A., Boutyline A., Semantic Structure in Large Language Model Embeddings Aug. 2025, arXiv:2508.10003v1:04 Aug 2025).

In the world of kongruity, these "to dos" are called "sticky notes." kongruity's React/Vite UI views a board of seemingly chaotic "sticky notes". But with one click, they are transformed into manageable, actionable groups, each with a header that explains the group semantic interrelation.

The backend is an Express API that serves "sticky note" data and proxies semantic grouping requests to Antrhopic Claude.

Developers may feel free to install other LLM SDKs and alter the syntax at backend/services/clustering.service.js to experiment with any LLM model/platform they prefer.

Prerequisites

• Node.js (v18 or later recommended)
• An Anthropic API key

Setup

1. Unzip the project

unzip kongruity.zip
cd kongruity

2. Create a secrets file

The backend expects a .secrets.js file containing an Anthropic API key in the root backend/ directory. This file is git-ignored and must be created manually:

echo 'export const anthropicApiKey = "<your Anthropic API key>"' > backend/.secrets.js

Replace <your Anthropic API key> with your actual key.

3. Install dependencies

cd backend
npm install

cd frontend
npm install

Run the app

Start the backend - Production Mode

From the backend/ directory:

npm run start

The API server starts on http://localhost:3001 (configurable via the PORT environment variable).

Start the backend - Development mode

To start using Nodemon for "hot reloads," if developing your own features:

npm run dev

Build the frontend - Production mode

From the frontend/ directory:

npm run build

Start the frontend - Development mode

From the frontend/ directory:

npm run dev

The Vite dev server starts on http://localhost:5173 by default. Open that URL in a browser.

Running tests

Backend tests

From the backend/ directory:

npm test

Backend tests use Supertest for HTTP assertions.

Frontend tests

From the frontend/ directory:

npm test

This runs vitest run with jsdom. For watch mode, during development:

npm run test:watch