Developer Joachim Z. revisits his 2018 post on code cleanliness, reflecting on the evolution of his thinking over five years. His original focus was on readability and maintainability, which he saw as key to managing complexity. The article emphasized clear naming, simple control flow, and small, focused units of logic, principles that still hold strong today. These practices are rooted in communication and help future developers, including one's own future self, understand the code better.

The post also discusses the Boy Scout Rule, which advocates for leaving code slightly better than you found it. This mindset promotes continuous improvement and prevents codebases from deteriorating over time. However, Z. now recognizes that these rules alone are insufficient. Cleanup is not always the top priority, especially when considering the context, ownership, and constraints of the code. Refactoring without understanding the original intent can lead to unintended consequences, such as introducing bugs or undoing deliberate decisions.

Z.'s experience with larger, older systems has taught him that understanding the code's context and purpose is more valuable than immediate aesthetic improvements. He now sees cleanup as a shared responsibility within a team, where changes can have unexpected ripple effects. This perspective shift underscores the importance of judgment in applying cleaning rules, as sometimes the best choice is to document intent or leave the code as is for later revision.

The reflection concludes that clean code is a byproduct of understanding, not a rigid checklist. Z. emphasizes stewardship and delivering value to customers over perfection. This evolution in thinking highlights the ongoing learning process in software development, where reframing old ideas can be as valuable as discovering new ones.