golang

Simplicity is the highest Go virtue. Three biases decide most calls:

• Resist abstraction until the cost of not abstracting is proven. An interface, a type parameter, or a layer added in anticipation of a second caller is a defect.
• Reach for the standard library first. A dependency earns its place by doing what the standard library does not.
• The go directive decides what may be written, not the installed toolchain.

Language Version

The go directive in go.mod sets the language version a module may use. Read it before writing code and never reach for a feature above it. The stdversion analyzer reports a standard-library symbol newer than the directive: Go 1.27 and later fail go test on it, earlier toolchains report it under go vet.

Floor version per feature. Anything older than 1.21 is available in every supported module.