Lightspeed core stack

About The Project

Lightspeed Core Stack (LCS) is an AI-powered assistant that provides answers to product questions using backend LLM services, agents, and RAG databases.

Overview

Architecture

Architecture diagram

Getting started

Authentication and Authorization

Installation and configuration

Deployment Guide

Linux

MacOS

Configuration

Status of Lightspeed Core Stack versions

Status of Lightspeed Core Stack versions

Supported versions

Unsupported versions

Info for developers

Contributing guide

API

OpenAPI specification

Conversations API

A2A [Agent-to-Agent] Protocol

RAG and BYOK

RAG Configuration Guide

BYOK guide

Other features

Providers

Sentry error tracking

User data collection

Database structure

Design documents

Conversation compaction

Supporting backport changes for releases

Testing

Testing

End-to-End Tests Guide

List of e2e scenarios

Releasing

Releasing

Demos

LCORE introduction

CodeRabbitAI

Lunch and Learn 2026

LCORE weak points for AI-driven agentic flow