From c1122522946ae422ad6828c24dec948579dec450 Mon Sep 17 00:00:00 2001
From: JeremyDev87 <soundbrokaz@kakao.com>
Date: Sat, 9 May 2026 10:30:49 +0900
Subject: [PATCH] =?UTF-8?q?feat(cli):=20=EB=B2=84=EC=A0=84=20=EC=B6=9C?=
 =?UTF-8?q?=EB=A0=A5=20=EA=B3=84=EC=95=BD=20=EC=B6=94=EA=B0=80?=
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루트 CLI에서 --version/-V를 처리하고 npm package version 기준 출력 계약을 테스트합니다.

Closes #82
---
 crates/kratos-cli/src/lib.rs         | 16 ++++++++++++++++
 crates/kratos-cli/tests/cli_smoke.rs | 24 ++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/crates/kratos-cli/src/lib.rs b/crates/kratos-cli/src/lib.rs
index b2fb669..7c823fe 100644
--- a/crates/kratos-cli/src/lib.rs
+++ b/crates/kratos-cli/src/lib.rs
@@ -31,6 +31,10 @@ fn run(
     let argv = &args[1..];
 
     match command.as_str() {
+        "--version" | "-V" => {
+            commands::write_output(stdout, &format!("kratos {}", package_version()))?;
+            Ok(0)
+        }
         "--help" | "-h" | "help" => {
             commands::write_output(stdout, &commands::format_root_help())?;
             Ok(0)
@@ -42,3 +46,15 @@ fn run(
         }
     }
 }
+
+fn package_version() -> String {
+    serde_json::from_str::<serde_json::Value>(include_str!("../../../package.json"))
+        .ok()
+        .and_then(|manifest| {
+            manifest
+                .get("version")
+                .and_then(serde_json::Value::as_str)
+                .map(str::to_owned)
+        })
+        .unwrap_or_else(|| env!("CARGO_PKG_VERSION").to_string())
+}
diff --git a/crates/kratos-cli/tests/cli_smoke.rs b/crates/kratos-cli/tests/cli_smoke.rs
index 602499c..e5fafca 100644
--- a/crates/kratos-cli/tests/cli_smoke.rs
+++ b/crates/kratos-cli/tests/cli_smoke.rs
@@ -14,6 +14,30 @@ fn root_help_matches_expected_shape() {
     );
 }
 
+#[test]
+fn root_version_flags_print_package_version() {
+    for flag in ["--version", "-V"] {
+        let output = run_cli(&[flag]);
+
+        assert!(output.status.success(), "{flag} should exit successfully");
+        assert_eq!(
+            String::from_utf8_lossy(&output.stdout),
+            format!("kratos {}\n", package_version())
+        );
+        assert!(output.stderr.is_empty(), "{flag} should not print stderr");
+    }
+}
+
+fn package_version() -> String {
+    let manifest: serde_json::Value =
+        serde_json::from_str(include_str!("../../../package.json")).expect("valid package.json");
+    manifest
+        .get("version")
+        .and_then(serde_json::Value::as_str)
+        .expect("package.json version")
+        .to_string()
+}
+
 #[test]
 fn command_help_matches_korean_policy() {
     let output = run_cli(&["clean", "--help"]);