LesliSystem provides shared system-level utilities for applications built with the Lesli Framework.

It exposes installed engine and gem metadata and provides helpers for resolving engine-specific models from application objects.

• Installed engine discovery
• Engine metadata and version introspection
• Installed Lesli gem discovery
• Lookup by engine name or code
• Engine-specific model resolution
• Shared system utilities for the Lesli ecosystem

Add LesliSystem to the application:

bundle add lesli_system

LesliSystem.engines
LesliSystem.engine("Lesli")
LesliSystem.engine(:lesli)
LesliSystem.engine("Lesli", "path")

Engine metadata includes its code, name, route path, version, build, description, and installation directory when available.

List the installed Lesli gems:

LesliSystem.gems

LesliSystem::Klass derives the engine namespace from an object or accepts it explicitly:

builder = LesliSystem::Klass.new(self)

builder.engine_name
builder.model.account
builder.model.dashboard

builder = LesliSystem::Klass.new(engine: "LesliBell")
builder.model.dashboard

Clone the repository and install its dependencies:

git clone https://github.com/LesliTech/LesliSystem.git
cd LesliSystem
bundle install

To use local source from a Lesli development workspace, reference it from the host application's Gemfile:

gem "lesli_system", path: "gems/LesliSystem"

Run the default test task from the LesliSystem directory:

bundle exec rake

• Lesli website
• Documentation
• Release notes
• Issue tracker
• Source code

• X: @LesliTech
• hello@lesli.tech
• https://www.lesli.tech

Copyright (c) 2026, Lesli Technologies, S. A.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.

The complete license text is available in the license file.

The Open-Source SaaS Development Framework for Ruby on Rails.