internal/config/config.go

@@ -118,8 +118,6 @@ func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
 
 	if s.Debug {
 		params.Logger.EnableDebugLogging()
-		s.log = params.Logger.Get()
-		log.Debug("Debug mode enabled")
 	}
 
 	// Log configuration summary (without secrets)

internal/logger/logger.go

@@ -17,8 +17,9 @@ type LoggerParams struct {
 }
 
 type Logger struct {
-	logger *slog.Logger
-	params LoggerParams
+	logger   *slog.Logger
+	levelVar *slog.LevelVar
+	params   LoggerParams
 }
 
 // nolint:revive // lc parameter is required by fx even if unused
@@ -26,24 +27,30 @@ func New(lc fx.Lifecycle, params LoggerParams) (*Logger, error) {
 	l := new(Logger)
 	l.params = params
 
+	// Use slog.LevelVar for dynamic log level changes
+	l.levelVar = new(slog.LevelVar)
+	l.levelVar.Set(slog.LevelInfo)
+
 	// Determine if we're running in a terminal
 	tty := false
 	if fileInfo, _ := os.Stdout.Stat(); (fileInfo.Mode() & os.ModeCharDevice) != 0 {
 		tty = true
 	}
 
+	replaceAttr := func(_ []string, a slog.Attr) slog.Attr { // nolint:revive // groups unused
+		// Always use UTC for timestamps
+		if a.Key == slog.TimeKey {
+			if t, ok := a.Value.Any().(time.Time); ok {
+				return slog.Time(slog.TimeKey, t.UTC())
+			}
+		}
+		return a
+	}
+
 	var handler slog.Handler
 	opts := &slog.HandlerOptions{
-		Level: slog.LevelInfo,
-		ReplaceAttr: func(_ []string, a slog.Attr) slog.Attr { // nolint:revive // groups unused
-			// Always use UTC for timestamps
-			if a.Key == slog.TimeKey {
-				if t, ok := a.Value.Any().(time.Time); ok {
-					return slog.Time(slog.TimeKey, t.UTC())
-				}
-			}
-			return a
-		},
+		Level:       l.levelVar,
+		ReplaceAttr: replaceAttr,
 	}
 
 	if tty {
@@ -63,34 +70,7 @@ func New(lc fx.Lifecycle, params LoggerParams) (*Logger, error) {
 }
 
 func (l *Logger) EnableDebugLogging() {
-	// Recreate logger with debug level
-	tty := false
-	if fileInfo, _ := os.Stdout.Stat(); (fileInfo.Mode() & os.ModeCharDevice) != 0 {
-		tty = true
-	}
-
-	var handler slog.Handler
-	opts := &slog.HandlerOptions{
-		Level: slog.LevelDebug,
-		ReplaceAttr: func(_ []string, a slog.Attr) slog.Attr { // nolint:revive // groups unused
-			// Always use UTC for timestamps
-			if a.Key == slog.TimeKey {
-				if t, ok := a.Value.Any().(time.Time); ok {
-					return slog.Time(slog.TimeKey, t.UTC())
-				}
-			}
-			return a
-		},
-	}
-
-	if tty {
-		handler = slog.NewTextHandler(os.Stdout, opts)
-	} else {
-		handler = slog.NewJSONHandler(os.Stdout, opts)
-	}
-
-	l.logger = slog.New(handler)
-	slog.SetDefault(l.logger)
+	l.levelVar.Set(slog.LevelDebug)
 	l.logger.Debug("debug logging enabled", "debug", true)
 }