Episode Details

Welcome to another episode of Knowledge Nuggets with Mirko Peters. In this episode, we're tackling one of the biggest misconceptions in software architecture: the Monorepo Myth. For years, engineering teams have debated whether a monorepo or a multirepo is the "correct" repository strategy. Discussions usually focus on Git performance, build speed, repository size, or tooling. But these technical arguments miss the real issue. Your repository strategy isn't primarily a Git decision—it's an organizational decision. The structure of your repositories shapes how teams collaborate, communicate, make decisions, and ultimately how quickly your organization can deliver software.

THE BIGGEST MISCONCEPTION
Most organizations evaluate repository strategies using technical criteria. Questions like:

• Can Git handle millions of files?
• How fast are clone operations?
• How quickly does CI complete?
• Which strategy scales better?

These are valid engineering concerns, but they aren't the questions that determine long-term success. The real question is: Where does your organization pay its coordination cost? A repository strategy doesn't eliminate coordination—it simply determines where that coordination happens. Whether you choose a monorepo or a multirepo, your teams still need to collaborate. The only difference is how visible that collaboration becomes.

UNDERSTANDING MONOREPOS
A monorepo stores multiple applications, services, libraries, infrastructure code, and shared components inside a single repository. This creates several important advantages:

• Shared tooling
• Consistent standards
• Easier large-scale refactoring
• Unified dependency management
• Atomic cross-project changes
• Complete visibility across the entire system

When teams are closely aligned, a monorepo enables rapid cross-cutting changes because everything lives together under one build system and one source of truth. However, as organizations grow, coordination becomes increasingly centralized. Shared libraries require approval from multiple teams, dependency updates affect everyone simultaneously, and build systems become more complex as additional teams join the repository. The technical challenges often blamed on monorepos are actually symptoms of growing organizational complexity rather than limitations of Git itself.

THE HIDDEN COST OF MONOREPOS
Large monorepos rarely fail because of technology. Git itself can manage repositories containing millions of files. Companies like Google successfully operate enormous monorepos. Instead, organizations encounter problems such as:

• Slow code reviews
• Long build pipelines
• Complex branching strategies
• Frozen dependencies
• Endless coordination meetings
• Difficult release planning

These issues arise because every significant architectural decision requires agreement across more teams. As organizations grow, the repository doesn't become technically unmanageable—it becomes organizationally expensive. The true scaling challenge is coordination, not source control.

HOW MULTIREPOS WORK
A multirepo architecture separates services, products, or components into independent repositories. Each team owns its own repository, deployment pipeline, testing strategy, and release schedule. The benefits include:

• Independent deployments
• Clear ownership
• Team autonomy
• Smaller repositories
• Faster local builds
• Flexible release cycles

However, the coordination burden doesn't disappear. Instead of coordinating through code reviews and shared repositories, teams coordinate through:

• APIs
• Versioning
• Release notes
• Contracts
• Documentation
• Governance processes

The coordination simply moves from c