legacy code

The Config File

A configuration file grew over the years to two thousand lines. A developer asked the senior, “Why are all of these settings here?” The senior answered, “Each one was once a question someone could not answer.” “And now?” “Now they are questions no one remembers asking.” Unpacking the Teaching Every line in that file started […]

The New Framework

A developer announced excitedly that they had rewritten the project in the newest framework. The senior developer asked, “What does it do now that it did not do before?” “The same things.” “And what does it not do that it did before?” The developer paused for a long time. What Are We Really Asking? The […]

The TODO Comment

A developer added a comment: // TODO: fix this later. Five years later, the comment was still there. The developer had left the company. The code worked. The senior developer asked the team, “Whose TODO is this now?” No one answered. The senior added, “And what does it mean to fix something that does not […]

The Rewrite

A team declared the old system unmaintainable and began a complete rewrite. Two years later, they shipped. Within months, developers were calling the new system unmaintainable. The senior developer mused, “If the disease followed us, perhaps we did not leave it behind.” Then: “What did we rewrite, the code or ourselves?” The Teaching Unfolds There […]