Programming July 21, 2026

Code Documentation: The Honest Habits That Make It Useful (and Not a Chore)

Developer writing code documentation at desk
Senior software engineer
We say documentation matters, but let’s define what that means in practice. In this interview, we dig into the real habits that separate useful docs from dead weight, and the candid trade-offs of keeping documentation up to date.

Why does documentation so often fall short, and what makes it work?

Lars F. Jensen

Documentation is supposed to be the map for every journey through a codebase. But let’s get real: most docs are either outdated, too vague, or written in a hurry just before a deadline. The truth is, writing good documentation takes discipline, and it rarely feels urgent compared to launching features or fixing bugs. I remember a project where the README was longer than the source code—helpful, until you realized half the sections were lies. The first step toward improvement is honesty. If you’re not going to update docs, don’t pretend you will. Start with the basics: cover what’s different, what’s confusing, and what future-you would want to know. That alone raises the bar above most teams.


How can teams prevent documentation from going stale?

Lars F. Jensen

The biggest trap is believing documentation is a one-and-done job. It ages fast, especially when teams move quickly. I’ve seen whole sections left to rot because everyone was afraid to admit they didn’t know if the instructions were still true. The antidote is routine: schedule time to review and refresh docs, ideally as part of every sprint. Another tip: keep docs as close to the code as possible. If your instructions live in a separate tool, they’ll be ignored. The more friction you remove from updating, the better the odds your docs will survive.


What practical habits make documentation easier and more useful?

Lars F. Jensen

Start small. Don’t aim for a perfect manual—just focus on what changes and what breaks. A checklist of gotchas, a list of non-obvious dependencies, or a simple diagram can save hours. I’ve found that even a single page explaining where to start builds confidence for new team members. Over time, these bite-sized docs grow into a resource that actually gets used. Remember: the perfect is the enemy of the useful. A little context is worth more than a hundred generic pages.


Does documentation have to be formal to be valuable?

Lars F. Jensen

Absolutely. Sometimes, the best docs are just candid comments in the code—quick explanations of why something exists or how a workaround came to be. The value isn’t in formality; it’s in clarity and honesty. Teams that allow for rough edges and admit what they don’t know build better docs. You don’t need fancy tools; you need the habit of writing things down when they’re fresh. And, just as important, the humility to revisit and revise when reality changes.