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Explore a conference talk introducing MeshCI, a workflow orchestration system that revolutionizes how automated workflows like CI pipelines, deployment scripts, and cron jobs are written and maintained. Learn how this innovative system addresses common pain points in workflow development by eliminating the need for ad-hoc domain-specific languages, bash-in-YAML configurations, or monolithic build scripts that plague traditional solutions like Jenkins and GitHub Actions. Discover how MeshCI leverages the fundamental insight that workflows are simply directed acyclic graphs (DAGs) of tasks, enabling developers to define these graphs using plain direct-style Scala code. Understand the local-first approach that allows testing workflows on developer machines before deployment, eliminating platform lock-in and reducing error-prone development cycles. Gain insights into how this system provides all the benefits of type safety, reusable abstractions, and familiar language syntax while maintaining compatibility with existing infrastructure like GitHub Action runners. The presentation covers two main areas: first, a comprehensive overview of the system architecture and how Scala (including ScalaJS components) powers the entire solution, and second, a detailed technical deep-dive into how Scala 3's advanced metaprogramming capabilities and contextual abstractions automatically derive task graph structures from regular Scala files that represent the actual workflows.
