LUCI

What it does

Access controls

LUCI configuration supports role based access controls for permissions such as reading project configurations, logs, and build information.checked 11 Oct 2026

Build foundation

LUCI is designed to provide a robust foundation for distributed computation on which teams can layer their own build scripts.checked 11 Oct 2026

Build scheduling

Buildbucket tracks builds, queues them into builders, and can translate a scheduled build into a Swarming task.checked 11 Oct 2026

Build UI

Milo displays information from Buildbucket and ResultDB about builders, builds, and test results, and can show custom consoles.checked 11 Oct 2026

Configuration

LUCI service configuration can specify access controls, Swarming dimensions, recipe names, and properties for builders.checked 11 Oct 2026

Design

LUCI is a fleet of complementary, independent, scalable services designed to provide distributed computation for build scripts.checked 5 Oct 2026

Distributed execution

Swarming runs arbitrary tasks across a fleet of workers called Swarming bots.checked 11 Oct 2026

File distribution

Isolate server distributes tens of thousands of files per task.checked 5 Oct 2026

Hosting

LUCI runs primarily on Google Cloud Platform and is designed to scale for large projects.checked 5 Oct 2026

Infrastructure

The toolkit includes automatic Google Compute Engine virtual machine recycling.checked 5 Oct 2026

Integrations

Buildbucket has native integration with Swarming and recipes, allowing builds to be scheduled on Swarming to run a configured recipe.checked 11 Oct 2026

License

The luci-py project is licensed under Apache v2.0.checked 5 Oct 2026

Operating systems

The documentation lists Windows, OSX, and Linux (Ubuntu), with Android, iOS, and ChromeOS use.checked 5 Oct 2026

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.checked 11 Oct 2026

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.checked 5 Oct 2026

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.checked 11 Oct 2026

Supported environments

The LUCI overview lists Windows, OSX, and Linux (Ubuntu) environments used with Android, iOS, and ChromeOS.checked 11 Oct 2026

Task distribution

Swarming distributes tasks across thousands of Swarming bots.checked 5 Oct 2026

Test results

Milo displays test result information from ResultDB alongside builder and build information.checked 11 Oct 2026

UI integration

Recipes can display subprocesses as steps, with step colors, descriptive text, and debugging logs in the LUCI UI.checked 5 Oct 2026

Use

LUCI is used by the Chromium project.checked 5 Oct 2026

Users

LUCI is used by the Chromium project and other teams, according to the LUCI repository overview.checked 11 Oct 2026