diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..28a1ea7
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2023 Leon Mika
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1b45aa1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# scriptx - Extras for Script
+
+Utilities that extend [github.com/bitfield/script](https://github.com/bitfield/script).
+
+Currently a WIP. The API is subject to change.
\ No newline at end of file
diff --git a/fmt_test.go b/fmt_test.go
index 9a12a4f..efe7116 100644
--- a/fmt_test.go
+++ b/fmt_test.go
@@ -31,10 +31,3 @@ func verifyPipeLines(t *testing.T, fn func(p *script.Pipe) *script.Pipe, inLines
 	assert.NoError(t, err)
 	assert.Equal(t, expOut, outLines)
 }
-
-func verifyPipeErr(t *testing.T, fn func(p *script.Pipe) *script.Pipe, inLines []string) {
-	pipe := script.Slice(inLines)
-	_, err := fn(pipe).Slice()
-
-	assert.Error(t, err)
-}
diff --git a/scriptx.go b/json.go
similarity index 99%
rename from scriptx.go
rename to json.go
index 9c2fc9a..9428215 100644
--- a/scriptx.go
+++ b/json.go
@@ -19,4 +19,4 @@ func ToJSON(fn func(line string) any) func(r io.Reader, w io.Writer) error {
 			return err
 		})
 	}
-}
\ No newline at end of file
+}
diff --git a/json_test.go b/json_test.go
new file mode 100644
index 0000000..a8c08ca
--- /dev/null
+++ b/json_test.go
@@ -0,0 +1,45 @@
+package scriptx_test
+
+import (
+	"testing"
+
+	"github.com/bitfield/script"
+	"github.com/lmika/scriptx"
+)
+
+func TestToJSON(t *testing.T) {
+	t.Run("should convert a line to a JSON object", func(t *testing.T) {
+		verifyPipeLines(t, func(p *script.Pipe) *script.Pipe {
+			return p.Filter(scriptx.ToJSON(func(line string) any {
+				return map[string]any{
+					"line":        line,
+					"line_length": len(line),
+				}
+			}))
+		}, []string{
+			"Just three words",
+			"She sells sea shells by the \"sea shore\"",
+			"Another example of a line",
+		}, []string{
+			`{"line":"Just three words","line_length":16}`,
+			`{"line":"She sells sea shells by the \"sea shore\"","line_length":39}`,
+			`{"line":"Another example of a line","line_length":25}`,
+		})
+	})
+
+	t.Run("should convert a line to a JSON array", func(t *testing.T) {
+		verifyPipeLines(t, func(p *script.Pipe) *script.Pipe {
+			return p.Filter(scriptx.ToJSON(func(line string) any {
+				return []any{line, line}
+			}))
+		}, []string{
+			"line",
+			"words words",
+			"foobar",
+		}, []string{
+			`["line","line"]`,
+			`["words words","words words"]`,
+			`["foobar","foobar"]`,
+		})
+	})
+}
diff --git a/subpipe_test.go b/subpipe_test.go
new file mode 100644
index 0000000..d96fb8a
--- /dev/null
+++ b/subpipe_test.go
@@ -0,0 +1,26 @@
+package scriptx_test
+
+import (
+	"testing"
+
+	"github.com/bitfield/script"
+	"github.com/lmika/scriptx"
+)
+
+func TestSubPipe(t *testing.T) {
+	t.Run("should run the subpipe for each line in the parent pipe", func(t *testing.T) {
+		verifyPipeLines(t, func(p *script.Pipe) *script.Pipe {
+			return p.Filter(scriptx.SubPipe(func (src *script.Pipe) *script.Pipe {
+				return src.Replace("Line", "Subpipe")
+			}))
+		}, []string{
+			"Line 1",
+			"Line 2",
+			"Line 3",
+		}, []string{
+			"Subpipe 1",
+			"Subpipe 2",
+			"Subpipe 3",
+		})
+	})
+}
\ No newline at end of file