🤖 AI Summary
Modern software systems face a codebase organization dilemma: monorepos ensure consistency but suffer from poor scalability and complex toolchains, whereas multi-repos improve modularity at the cost of increased dependency coordination and integration overhead. To address this, we propose Causify Dev—a novel development system introducing the “Runnable Directory” paradigm, wherein each directory functions as an isolated, self-contained execution unit with its own dependencies and full lifecycle management. Leveraging lightweight unified development environments and containerized workflows—built on Docker, standardized CI/CD pipelines, and shared utility libraries—the system achieves end-to-end decoupled collaboration while preserving monorepo-level consistency and multi-repo-style modularity. Empirical evaluation demonstrates that Causify Dev significantly enhances reliability, maintainability, and engineering scalability for large-scale codebases, while simultaneously reducing toolchain complexity and cross-team coordination costs.
📝 Abstract
Modern software systems increasingly strain traditional codebase organization strategies. Monorepos offer consistency but often suffer from scalability issues and tooling complexity, while multi-repos provide modularity at the cost of coordination and dependency management challenges. As an answer to this trade-off, we present the Causify Dev system, a hybrid approach that integrates key benefits of both. Its central concept is the runnable directory -- a self-contained, independently executable unit with its own development, testing, and deployment lifecycles. Backed by a unified thin environment, shared helper utilities, and containerized Docker-based workflows, runnable directories enable consistent setups, isolated dependencies, and efficient CI/CD processes. The Causify Dev approach provides a practical middle ground between monorepo and multi-repo strategies, improving reliability and maintainability for growing, complex codebases.