make dev/dev-debug 구분.

backend/internal/logger/client_log_policy.go

@@ -37,20 +37,25 @@ func IsProductionEnv(appEnv string) bool {
 	return IsProductionLikeEnv(appEnv)
 }
 
-func parseBoolFlag(raw string) bool {
+func parseOptionalBoolFlag(raw string) (bool, bool) {
 	switch strings.ToLower(strings.TrimSpace(raw)) {
 	case "1", "true", "yes", "y", "on":
-		return true
+		return true, true
+	case "0", "false", "no", "n", "off":
+		return false, true
 	default:
-		return false
+		return false, false
 	}
 }
 
-func ClientDebugEnabled(appEnv, productionDebugFlag string) bool {
+func ClientDebugEnabled(appEnv, debugFlag string) bool {
+	if enabled, ok := parseOptionalBoolFlag(debugFlag); ok {
+		return enabled
+	}
 	if !IsProductionEnv(appEnv) {
 		return true
 	}
-	return parseBoolFlag(productionDebugFlag)
+	return false
 }
 
 func NormalizeClientLogLevel(level string) slog.Level {

backend/internal/logger/client_log_policy_test.go

@@ -9,7 +9,14 @@ import (
 func TestClientDebugEnabled(t *testing.T) {
 	t.Run("non production enables debug by default", func(t *testing.T) {
 		assert.True(t, ClientDebugEnabled("dev", ""))
-		assert.True(t, ClientDebugEnabled("local", "false"))
+		assert.True(t, ClientDebugEnabled("local", ""))
+	})
+
+	t.Run("explicit debug flag applies in non production", func(t *testing.T) {
+		assert.True(t, ClientDebugEnabled("dev", "true"))
+		assert.True(t, ClientDebugEnabled("local", "1"))
+		assert.False(t, ClientDebugEnabled("dev", "false"))
+		assert.False(t, ClientDebugEnabled("local", "0"))
 	})
 
 	t.Run("production disables debug by default", func(t *testing.T) {
@@ -37,6 +44,8 @@ func TestShouldAcceptClientLog(t *testing.T) {
 	assert.True(t, ShouldAcceptClientLog("stage", "", "ERROR"))
 	assert.True(t, ShouldAcceptClientLog("production", "true", "INFO"))
 	assert.True(t, ShouldAcceptClientLog("dev", "", "INFO"))
+	assert.False(t, ShouldAcceptClientLog("dev", "false", "INFO"))
+	assert.True(t, ShouldAcceptClientLog("dev", "false", "WARN"))
 }
 
 func TestShouldFilterNoisyClientInfo(t *testing.T) {
@@ -44,6 +53,7 @@ func TestShouldFilterNoisyClientInfo(t *testing.T) {
 	assert.True(t, ShouldFilterNoisyClientInfo("stage", "", "Navigating to /ko/signin"))
 	assert.False(t, ShouldFilterNoisyClientInfo("production", "true", "Navigating to /ko/signin"))
 	assert.False(t, ShouldFilterNoisyClientInfo("dev", "", "Navigating to /ko/signin"))
+	assert.True(t, ShouldFilterNoisyClientInfo("dev", "false", "Navigating to /ko/signin"))
 }
 
 func TestSanitizeClientLogData(t *testing.T) {