williammartin/concourse

Concourse is a tool that automates your team's build, test, and deployment workflows. Think of it as a visual pipeline builder: you define a series of steps (fetch code, run tests, build a container, deploy to production), and Concourse runs them in order, showing you exactly what's happening at each stage. It's built for teams that need reliable, repeatable automation without having to wrestle with complex configuration files. The system is broken into several specialized pieces that work together. The main brain is ATC, which handles the pipeline logic, provides a web interface to watch your builds, and serves an API so other tools can talk to it. Fly is a command-line tool you use to define and manage those pipelines. Garden handles actually running your code in containers (think isolated sandboxes). TSA is a security layer that ensures only authorized worker machines can connect to run jobs. Baggageclaim manages the temporary files and caches that your builds create. This repository acts as the hub, it packages all these pieces together using BOSH, a deployment tool, so teams can spin up a working Concourse instance in their infrastructure. You'd use Concourse if you're tired of clicking buttons in Jenkins, if you need your CI system to scale across multiple machines, or if you want a clean, code-first way to define your build pipelines. It's especially popular in DevOps teams and organizations running cloud infrastructure, since it integrates well with container platforms and handles complex multi-stage deployments naturally. The project is open source and community-driven. The README points to documentation on how to set it up, and contributors can file issues or check the roadmap to see what's being worked on. The actual code lives in separate repositories for each component, so developers working on different parts can move independently while this central repository keeps everything coordinated.