From e812e3a4115c6629718f38f7a19bc4bc58442a1f Mon Sep 17 00:00:00 2001
From: Byron Guina <byron.guina@gmail.com>
Date: Sun, 15 Mar 2026 22:45:13 -0500
Subject: [PATCH 1/2] feat: add hello command that prints hello world

Adds a simple 'af hello' subcommand that prints "hello world" to stdout.
Includes a unit test verifying the output.
---
 cmd/af/cmd/hello.go      | 19 +++++++++++++++++++
 cmd/af/cmd/hello_test.go | 19 +++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 cmd/af/cmd/hello.go
 create mode 100644 cmd/af/cmd/hello_test.go

diff --git a/cmd/af/cmd/hello.go b/cmd/af/cmd/hello.go
new file mode 100644
index 0000000..6a1b6ab
--- /dev/null
+++ b/cmd/af/cmd/hello.go
@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var helloCmd = &cobra.Command{
+	Use:   "hello",
+	Short: "Print a greeting",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Fprintln(cmd.OutOrStdout(), "hello world")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(helloCmd)
+}
diff --git a/cmd/af/cmd/hello_test.go b/cmd/af/cmd/hello_test.go
new file mode 100644
index 0000000..b97976f
--- /dev/null
+++ b/cmd/af/cmd/hello_test.go
@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestHelloCmdPrintsHelloWorld(t *testing.T) {
+	var buf bytes.Buffer
+	helloCmd.SetOut(&buf)
+
+	helloCmd.Run(helloCmd, nil)
+
+	got := buf.String()
+	want := "hello world\n"
+	if got != want {
+		t.Fatalf("hello output = %q, want %q", got, want)
+	}
+}

From 3dffa82167a1534ec41d5f34f2680f4ec02b131a Mon Sep 17 00:00:00 2001
From: Byron Guina <byron.guina@gmail.com>
Date: Sun, 15 Mar 2026 22:46:18 -0500
Subject: [PATCH 2/2] chore: add test cleanup for helloCmd output buffer

Review finding: SetOut on package-level command should be reset
after test to prevent state leakage between tests.
---
 cmd/af/cmd/hello_test.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cmd/af/cmd/hello_test.go b/cmd/af/cmd/hello_test.go
index b97976f..c8afa93 100644
--- a/cmd/af/cmd/hello_test.go
+++ b/cmd/af/cmd/hello_test.go
@@ -8,6 +8,7 @@ import (
 func TestHelloCmdPrintsHelloWorld(t *testing.T) {
 	var buf bytes.Buffer
 	helloCmd.SetOut(&buf)
+	t.Cleanup(func() { helloCmd.SetOut(nil) })
 
 	helloCmd.Run(helloCmd, nil)