LUCI

What the maker publishes

Access controls

The toolkit includes federated authentication and access control lists. source

Access controls

LUCI configuration supports role based access controls for permissions such as reading project configurations, logs, and build information. source

Build foundation

LUCI is designed to provide a robust foundation for distributed computation on which teams can layer their own build scripts. source

Build scheduling

Buildbucket tracks builds, queues them into builders, and can translate a scheduled build into a Swarming task. source

Build UI

Milo displays information from Buildbucket and ResultDB about builders, builds, and test results, and can show custom consoles. source

Configuration

LUCI includes git-based configuration data propagation. source

Configuration

LUCI service configuration can specify access controls, Swarming dimensions, recipe names, and properties for builders. source

Design

LUCI is a fleet of complementary, independent, scalable services designed to provide distributed computation for build scripts. source

Distributed execution

Swarming runs arbitrary tasks across a fleet of workers called Swarming bots. source

File distribution

Isolate server distributes tens of thousands of files per task. source

Hosting

LUCI runs primarily on Google Cloud Platform and is designed to scale for large projects. source

Infrastructure

The toolkit includes automatic Google Compute Engine virtual machine recycling. source

Integrations

Buildbucket has native integration with Swarming and recipes, allowing builds to be scheduled on Swarming to run a configured recipe. source

License

The luci-py project is licensed under Apache v2.0. source

Operating systems

The documentation lists Windows, OSX, and Linux (Ubuntu), with Android, iOS, and ChromeOS use. source

Purpose

LUCI is an ensemble of services for large-scale continuous integration. source

Purpose

LUCI stands for Layered “Universal” Continuous Integration and is a fleet of complementary, independent, scalable services for CI needs ranging from small to huge. source

Recipe framework

LUCI Recipes are a Python 3 framework for CI scripts designed to be testable, cross-platform, shareable, locally runnable, and integrated with the LUCI UI. source

Scale

The LUCI overview describes Swarming as distributing tasks across thousands of bots and Isolate server as distributing tens of thousands of files per task. source

Supported environments

The LUCI overview lists Windows, OSX, and Linux (Ubuntu) environments used with Android, iOS, and ChromeOS. source

Task distribution

Swarming distributes tasks across thousands of Swarming bots. source

Test results

Milo displays test result information from ResultDB alongside builder and build information. source

UI integration

Recipes can display subprocesses as steps, with step colors, descriptive text, and debugging logs in the LUCI UI. source

Use

LUCI is used by the Chromium project. source

Checked against the maker's pages on 11 Oct 2026.