See exported functions in src or in nice published page on JSR.
In repo you want to import package in:
bunx jsr add @nikiv/utils
Other import options can be seen on JSR page.
Can also clone repo and bun link it.
bun link
Then in repo you want to link package from:
bun link @nikiv/ts-utils
bun i
Currently I write functions in src and test them by running:
bun sr
Which runs a gitignored scripts/private-run.ts file. Or I test functions through tests with bun.