feat: first implementation

README.md

Taskfile.yml

dedup.go

error.go

go.mod

go.sum

hash.go

hash_api.go

hash_api_test.go

hash_test.go

hash_watcher.go

hash_watcher_test.go

lighthouse.go

lighthouse_test.go

watch.go

watch_test.go

watching.go

watching_test.go