Naming

Choosing what to call things so a reader can guess what they do without opening them. unpaidInvoices tells you something. data tells you almost nothing.

An agent finds its way round a codebase largely by searching for words. If the thing it needs has a vague name, the search misses, and it may write a second copy of something that already exists. A name is also the cheapest context there is, since it arrives at every place the thing is used.