diff --git a/cmd/api/cmd_spec.go b/cmd/api/cmd_spec.go
index 7ad145e..49f6477 100644
--- a/cmd/api/cmd_spec.go
+++ b/cmd/api/cmd_spec.go
@@ -13,10 +13,11 @@ import (
 
 func addSpecCommand(parent *cli.Command) {
 	var (
-		output  string
-		format  string
-		title   string
-		version string
+		output      string
+		format      string
+		title       string
+		description string
+		version     string
 	)
 
 	cmd := cli.NewCommand("spec", "Generate OpenAPI specification", "", func(cmd *cli.Command, args []string) error {
@@ -24,7 +25,7 @@ func addSpecCommand(parent *cli.Command) {
 		// Additional groups can be added here as the platform grows.
 		builder := &goapi.SpecBuilder{
 			Title:       title,
-			Description: "Lethean Core API",
+			Description: description,
 			Version:     version,
 		}
 
@@ -48,6 +49,7 @@ func addSpecCommand(parent *cli.Command) {
 	cli.StringFlag(cmd, &output, "output", "o", "", "Write spec to file instead of stdout")
 	cli.StringFlag(cmd, &format, "format", "f", "json", "Output format: json or yaml")
 	cli.StringFlag(cmd, &title, "title", "t", "Lethean Core API", "API title in spec")
+	cli.StringFlag(cmd, &description, "description", "d", "Lethean Core API", "API description in spec")
 	cli.StringFlag(cmd, &version, "version", "V", "1.0.0", "API version in spec")
 
 	parent.AddCommand(cmd)
diff --git a/cmd/api/cmd_test.go b/cmd/api/cmd_test.go
index b24c723..4d9130e 100644
--- a/cmd/api/cmd_test.go
+++ b/cmd/api/cmd_test.go
@@ -4,6 +4,8 @@ package api
 
 import (
 	"bytes"
+	"encoding/json"
+	"os"
 	"testing"
 
 	"forge.lthn.ai/core/cli/pkg/cli"
@@ -51,11 +53,44 @@ func TestAPISpecCmd_Good_JSON(t *testing.T) {
 	if specCmd.Flag("title") == nil {
 		t.Fatal("expected --title flag on spec command")
 	}
+	if specCmd.Flag("description") == nil {
+		t.Fatal("expected --description flag on spec command")
+	}
 	if specCmd.Flag("version") == nil {
 		t.Fatal("expected --version flag on spec command")
 	}
 }
 
+func TestAPISpecCmd_Good_CustomDescription(t *testing.T) {
+	root := &cli.Command{Use: "root"}
+	AddAPICommands(root)
+
+	outputFile := t.TempDir() + "/spec.json"
+	root.SetArgs([]string{"api", "spec", "--description", "Custom API description", "--output", outputFile})
+	root.SetErr(new(bytes.Buffer))
+
+	if err := root.Execute(); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	var spec map[string]any
+	data, err := os.ReadFile(outputFile)
+	if err != nil {
+		t.Fatalf("expected spec file to be written: %v", err)
+	}
+	if err := json.Unmarshal(data, &spec); err != nil {
+		t.Fatalf("expected valid JSON spec, got error: %v", err)
+	}
+
+	info, ok := spec["info"].(map[string]any)
+	if !ok {
+		t.Fatal("expected info object in generated spec")
+	}
+	if info["description"] != "Custom API description" {
+		t.Fatalf("expected custom description, got %v", info["description"])
+	}
+}
+
 func TestAPISDKCmd_Bad_NoLang(t *testing.T) {
 	root := &cli.Command{Use: "root"}
 	AddAPICommands(root)