diff --git a/sort-cli/config.go b/cmd/sort-cli/config.go
similarity index 91%
rename from sort-cli/config.go
rename to cmd/sort-cli/config.go
index 0cd8c29..5edf70d 100644
--- a/sort-cli/config.go
+++ b/cmd/sort-cli/config.go
@@ -2,8 +2,6 @@ package main
 
 import "flag"
 
-const stdin = "-"
-
 type Config struct {
 	Key     int
 	Numeric bool
@@ -23,6 +21,6 @@ func (c *Config) ParseFlags() {
 	c.Sources = flag.Args()
 
 	if len(c.Sources) == 0 {
-		c.Sources = []string{stdin}
+		c.Sources = []string{"-"}
 	}
 }
diff --git a/sort-cli/main.go b/cmd/sort-cli/main.go
similarity index 72%
rename from sort-cli/main.go
rename to cmd/sort-cli/main.go
index 62b9d53..614321a 100644
--- a/sort-cli/main.go
+++ b/cmd/sort-cli/main.go
@@ -2,6 +2,8 @@ package main
 
 import (
 	"os"
+
+	sortcli "git.grachevko.ru/grachevko/h/sort-cli"
 )
 
 func main() {
@@ -18,8 +20,8 @@ func run() string {
 	cfg := &Config{}
 	cfg.ParseFlags()
 
-	lines := content{}
-	lines.Load(open(cfg.Sources))
+	lines := sortcli.Content{}
+	lines.Load(sortcli.Open(cfg.Sources))
 
 	if cfg.Unique {
 		lines.Uniques()
diff --git a/sort-cli/main_test.go b/cmd/sort-cli/main_test.go
similarity index 100%
rename from sort-cli/main_test.go
rename to cmd/sort-cli/main_test.go
diff --git a/sort-cli/testdata/first b/cmd/sort-cli/testdata/first
similarity index 100%
rename from sort-cli/testdata/first
rename to cmd/sort-cli/testdata/first
diff --git a/sort-cli/go.mod b/go.mod
similarity index 54%
rename from sort-cli/go.mod
rename to go.mod
index 3377927..d070bb3 100644
--- a/sort-cli/go.mod
+++ b/go.mod
@@ -1,10 +1,10 @@
-module sort-cli
+module git.grachevko.ru/grachevko/h
 
-go 1.21.6
+go 1.22.2
 
 require (
-	github.com/stretchr/testify v1.8.4
-	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3
+	github.com/stretchr/testify v1.9.0
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842
 )
 
 require (
diff --git a/merge-channel/go.sum b/go.sum
similarity index 65%
rename from merge-channel/go.sum
rename to go.sum
index fa4b6e6..bb8106c 100644
--- a/merge-channel/go.sum
+++ b/go.sum
@@ -2,8 +2,10 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 h1:vr/HnozRka3pE4EsMEg1lgkXJkTFJCVUX+S/ZT6wYzM=
+golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/lru/Makefile b/lru/Makefile
deleted file mode 100644
index 4543fa9..0000000
--- a/lru/Makefile
+++ /dev/null
@@ -1,48 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/lru/go.mod b/lru/go.mod
deleted file mode 100644
index 1c7dc42..0000000
--- a/lru/go.mod
+++ /dev/null
@@ -1,11 +0,0 @@
-module lru
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
diff --git a/lru/go.sum b/lru/go.sum
deleted file mode 100644
index fa4b6e6..0000000
--- a/lru/go.sum
+++ /dev/null
@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/merge-channel/Makefile b/merge-channel/Makefile
deleted file mode 100644
index 977c1c9..0000000
--- a/merge-channel/Makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/merge-channel/go.mod b/merge-channel/go.mod
deleted file mode 100644
index 3147e31..0000000
--- a/merge-channel/go.mod
+++ /dev/null
@@ -1,11 +0,0 @@
-module merge-channel
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
diff --git a/merge-channel/main.go b/merge-channel/main.go
index 6a581c5..5cd20b4 100644
--- a/merge-channel/main.go
+++ b/merge-channel/main.go
@@ -1,11 +1,11 @@
-package main
+package mergechannel
 
 import (
 	"errors"
 	"sync"
 )
 
-var InsufficientChannelsErr = errors.New("channels count must be >2")
+var ErrInsufficientChannels = errors.New("channels count must be >2")
 
 func merge[T any](channels ...<-chan T) (<-chan T, error) {
 	out := make(chan T)
@@ -13,7 +13,7 @@ func merge[T any](channels ...<-chan T) (<-chan T, error) {
 	if len(channels) < 2 {
 		close(out)
 
-		return out, InsufficientChannelsErr
+		return out, ErrInsufficientChannels
 	}
 
 	var wg sync.WaitGroup
diff --git a/merge-channel/main_test.go b/merge-channel/main_test.go
index 622c4c4..6ca591a 100644
--- a/merge-channel/main_test.go
+++ b/merge-channel/main_test.go
@@ -1,4 +1,4 @@
-package main
+package mergechannel
 
 import (
 	"testing"
@@ -32,5 +32,5 @@ func TestInsufficient(t *testing.T) {
 	a := make(chan int)
 
 	_, err := merge(a)
-	assert.Equal(t, err, InsufficientChannelsErr)
+	assert.Equal(t, err, ErrInsufficientChannels)
 }
diff --git a/pipeline/Makefile b/pipeline/Makefile
deleted file mode 100644
index 977c1c9..0000000
--- a/pipeline/Makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/pipeline/go.mod b/pipeline/go.mod
deleted file mode 100644
index 0c38406..0000000
--- a/pipeline/go.mod
+++ /dev/null
@@ -1,11 +0,0 @@
-module pipeline
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
diff --git a/pipeline/go.sum b/pipeline/go.sum
deleted file mode 100644
index fa4b6e6..0000000
--- a/pipeline/go.sum
+++ /dev/null
@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/pipeline/main.go b/pipeline/pipeline.go
similarity index 91%
rename from pipeline/main.go
rename to pipeline/pipeline.go
index adce226..0dc07e3 100644
--- a/pipeline/main.go
+++ b/pipeline/pipeline.go
@@ -1,4 +1,4 @@
-package main
+package pipeline
 
 func Pipe[In any, Out any](in <-chan In, pipe func(In) Out) <-chan Out {
 	out := make(chan Out)
diff --git a/pipeline/main_test.go b/pipeline/pipeline_test.go
similarity index 93%
rename from pipeline/main_test.go
rename to pipeline/pipeline_test.go
index 54aeabd..6a2f69b 100644
--- a/pipeline/main_test.go
+++ b/pipeline/pipeline_test.go
@@ -1,4 +1,4 @@
-package main
+package pipeline
 
 import (
 	"testing"
diff --git a/semaphore/Makefile b/semaphore/Makefile
deleted file mode 100644
index 977c1c9..0000000
--- a/semaphore/Makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/semaphore/go.mod b/semaphore/go.mod
deleted file mode 100644
index 5d89c1e..0000000
--- a/semaphore/go.mod
+++ /dev/null
@@ -1,3 +0,0 @@
-module semaphore
-
-go 1.21.6
diff --git a/semaphore/main.go b/semaphore/semaphore.go
similarity index 98%
rename from semaphore/main.go
rename to semaphore/semaphore.go
index e3ba151..6225e29 100644
--- a/semaphore/main.go
+++ b/semaphore/semaphore.go
@@ -1,4 +1,4 @@
-package main
+package semaphore
 
 import (
 	"context"
diff --git a/semaphore/main_test.go b/semaphore/semaphore_test.go
similarity index 75%
rename from semaphore/main_test.go
rename to semaphore/semaphore_test.go
index f53da0c..4a1c4ea 100644
--- a/semaphore/main_test.go
+++ b/semaphore/semaphore_test.go
@@ -1,4 +1,4 @@
-package main
+package semaphore
 
 import (
 	"testing"
diff --git a/sort-cli/Makefile b/sort-cli/Makefile
deleted file mode 100644
index 19ff9ab..0000000
--- a/sort-cli/Makefile
+++ /dev/null
@@ -1,50 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: tidy audit test/cover
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/sort-cli/content.go b/sort-cli/content.go
index aa36569..f552317 100644
--- a/sort-cli/content.go
+++ b/sort-cli/content.go
@@ -1,4 +1,4 @@
-package main
+package sortcli
 
 import (
 	"bufio"
@@ -13,9 +13,9 @@ import (
 // NL New line constant
 const NL = "\n"
 
-type content [][]byte
+type Content [][]byte
 
-func (c *content) Sort(reverse bool) {
+func (c *Content) Sort(reverse bool) {
 	slices.SortFunc(*c, func(a, b []byte) int {
 		if reverse {
 			a, b = b, a
@@ -25,10 +25,10 @@ func (c *content) Sort(reverse bool) {
 	})
 }
 
-func (c *content) Uniques() {
+func (c *Content) Uniques() {
 	m := make(map[string]struct{}, len(*c))
 
-	*c = slices.DeleteFunc[content, []byte](*c, func(line []byte) bool {
+	*c = slices.DeleteFunc[Content, []byte](*c, func(line []byte) bool {
 		if _, ok := m[string(line)]; !ok {
 			m[string(line)] = struct{}{}
 
@@ -39,7 +39,7 @@ func (c *content) Uniques() {
 	})
 }
 
-func (c *content) String() string {
+func (c *Content) String() string {
 	lines := *c
 
 	var n int
@@ -64,7 +64,7 @@ func (c *content) String() string {
 	return sb.String()
 }
 
-func (c *content) Load(r io.Reader) {
+func (c *Content) Load(r io.Reader) {
 	br := bufio.NewReader(r)
 
 	for {
diff --git a/sort-cli/content_test.go b/sort-cli/content_test.go
index 5929c13..6d8e548 100644
--- a/sort-cli/content_test.go
+++ b/sort-cli/content_test.go
@@ -1,4 +1,4 @@
-package main
+package sortcli
 
 import (
 	"strings"
@@ -16,7 +16,7 @@ Africa
 `
 
 func TestLoad(t *testing.T) {
-	c := &content{}
+	c := &Content{}
 	c.Load(strings.NewReader(input))
 
 	assert.Equal(t, input, c.String())
@@ -42,7 +42,7 @@ America`,
 		tc := tc
 
 		t.Run(tc.Name, func(t *testing.T) {
-			c := &content{}
+			c := &Content{}
 			c.Load(strings.NewReader(tc.Content))
 
 			c.Uniques()
diff --git a/sort-cli/go.sum b/sort-cli/go.sum
deleted file mode 100644
index 2939b8f..0000000
--- a/sort-cli/go.sum
+++ /dev/null
@@ -1,12 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3 h1:hNQpMuAJe5CtcUqCXaWga3FHu+kQvCqcsoVaQgSV60o=
-golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3/go.mod h1:idGWGoKP1toJGkd5/ig9ZLuPcZBC3ewk7SzmH0uou08=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/sort-cli/loader.go b/sort-cli/loader.go
index d9d336d..4c0654d 100644
--- a/sort-cli/loader.go
+++ b/sort-cli/loader.go
@@ -1,4 +1,4 @@
-package main
+package sortcli
 
 import (
 	"io"
@@ -6,13 +6,13 @@ import (
 	"os"
 )
 
-func open(sources []string) io.Reader {
+func Open(sources []string) io.Reader {
 	rs := make([]io.Reader, 0, len(sources))
 
 	for _, source := range sources {
 		var r io.Reader
 
-		if source == stdin {
+		if source == "-" {
 			r = os.Stdin
 		} else {
 			if _, err := os.Stat(source); err != nil {
diff --git a/tmp/.gitkeep b/tmp/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/unique-chars/Makefile b/unique-chars/Makefile
deleted file mode 100644
index 4543fa9..0000000
--- a/unique-chars/Makefile
+++ /dev/null
@@ -1,48 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: audit
-audit:
-	go mod verify
-	go vet ./...
-	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000 ./...
-	go run golang.org/x/vuln/cmd/govulncheck@latest ./...
-	go test -race -buildvcs -vet=off ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -v -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -v -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/unique-chars/go.mod b/unique-chars/go.mod
deleted file mode 100644
index e0e56d6..0000000
--- a/unique-chars/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module uniqueschars
-
-go 1.21.6
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
diff --git a/unique-chars/go.sum b/unique-chars/go.sum
deleted file mode 100644
index 8cf6655..0000000
--- a/unique-chars/go.sum
+++ /dev/null
@@ -1,9 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/unique-chars/main.go b/unique-chars/uniquechars.go
similarity index 100%
rename from unique-chars/main.go
rename to unique-chars/uniquechars.go
diff --git a/unique-chars/main_test.go b/unique-chars/uniquechars_test.go
similarity index 100%
rename from unique-chars/main_test.go
rename to unique-chars/uniquechars_test.go
diff --git a/worker-pool/Makefile b/worker-pool/Makefile
deleted file mode 100644
index 977c1c9..0000000
--- a/worker-pool/Makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-.DEFAULT_GOAL := help
-
-# ==================================================================================== #
-# HELPERS
-# ==================================================================================== #
-
-## help: print this help message
-.PHONY: help
-help:
-	@echo 'Usage:'
-	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
-
-## all: tidy + audit + test/cover
-all: generate tidy test lint test/cover
-
-
-# ==================================================================================== #
-# QUALITY CONTROL
-# ==================================================================================== #
-
-## tidy: format code and tidy modfile
-.PHONY: tidy
-tidy:
-	go fmt ./...
-	goimports -local=$(shell cat go.mod | grep module | awk '{print $$2}')/ -w .
-	go mod tidy -v
-
-## audit: run quality control checks
-.PHONY: lint
-lint:
-	go mod verify
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run -v ./...
-
-
-# ==================================================================================== #
-# DEVELOPMENT
-# ==================================================================================== #
-
-## generate: run all generators
-.PHONY: generate
-generate:
-	go generate ./...
-
-## test: run all tests
-.PHONY: test
-test:
-	go test -race -buildvcs ./...
-
-## test/cover: run all tests and display coverage
-.PHONY: test/cover
-test/cover:
-	go test -race -buildvcs -coverprofile=/tmp/coverage.out ./...
-	go tool cover -html=/tmp/coverage.out
diff --git a/worker-pool/go.mod b/worker-pool/go.mod
deleted file mode 100644
index a01eea9..0000000
--- a/worker-pool/go.mod
+++ /dev/null
@@ -1,11 +0,0 @@
-module worker-pool
-
-go 1.21.6
-
-require github.com/stretchr/testify v1.8.4
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)
diff --git a/worker-pool/main.go b/worker-pool/workerpool.go
similarity index 93%
rename from worker-pool/main.go
rename to worker-pool/workerpool.go
index 1abe752..b57f366 100644
--- a/worker-pool/main.go
+++ b/worker-pool/workerpool.go
@@ -1,4 +1,4 @@
-package main
+package workerpool
 
 import (
 	"fmt"
diff --git a/worker-pool/main_test.go b/worker-pool/workerpool_test.go
similarity index 96%
rename from worker-pool/main_test.go
rename to worker-pool/workerpool_test.go
index 1511387..8639a9a 100644
--- a/worker-pool/main_test.go
+++ b/worker-pool/workerpool_test.go
@@ -1,4 +1,4 @@
-package main
+package workerpool
 
 import (
 	"fmt"