In the v1 documentation, the following tutorials:

• Creating an application in Go
• Creating a built-in application in Go

Include instructions and references to v0.38x e.g.:
go get github.com/cometbft/cometbft@v0.38.0

All these references should be upgraded to v1.0 since there are breaking API changes (type renames) that are incompatible with older releases.