Happy Code tells you why

Perspective is worth 80 IQ points.

You open an old part of the system.

The code is clear.
You can work out what it does.
The only thing you can’t tell:
why was it built this way?

It is good at showing what.
It is bad at preserving why.

Code constantly changes.
Requirements shift.
Constraints fade.
The people who decided move on.

What once was an obvious choice
now looks like a mistake.
The reasons are gone.
Only the result remains.

This is why we explain our decisions.

What problem were we solving?
What options did we reject?
Why was the simple version not enough?

The form does not matter.
An Architecture Decision Record.
A careful commit history.
A doc left where the next person will look.

Just write it down.
It says: this was deliberate.
Here is what you cannot see.

Happy Code does not just work.
It remembers why.

And the why outlasts the what.