Add default value for config

pkg/config/config.go

@@ -245,7 +245,7 @@ type AgentDefaults struct {
 	MaxMediaSize              int                `json:"max_media_size,omitempty"        env:"PICOCLAW_AGENTS_DEFAULTS_MAX_MEDIA_SIZE"`
 	Routing                   *RoutingConfig     `json:"routing,omitempty"`
 	ToolFeedback              ToolFeedbackConfig `json:"tool_feedback,omitempty"`
-	LogLevel                  string             `json:"log_level,omitempty"          env:"PICOCLAW_LOG_LEVEL"`
+	LogLevel                  string             `json:"log_level,omitempty"             env:"PICOCLAW_LOG_LEVEL"`
 }
 
 const (

pkg/config/config_test.go

@@ -470,6 +470,13 @@ func TestDefaultConfig_CronAllowCommandEnabled(t *testing.T) {
 	}
 }
 
+func TestDefaultConfig_LogLevel(t *testing.T) {
+	cfg := DefaultConfig()
+	if cfg.Agents.Defaults.LogLevel != "fatal" {
+		t.Errorf("LogLevel = %q, want \"fatal\"", cfg.Agents.Defaults.LogLevel)
+	}
+}
+
 func TestLoadConfig_OpenAIWebSearchDefaultsTrueWhenUnset(t *testing.T) {
 	dir := t.TempDir()
 	configPath := filepath.Join(dir, "config.json")
@@ -1087,7 +1094,8 @@ func TestConfigLogLevelEmpty(t *testing.T) {
 	if err != nil {
 		t.Fatalf("LoadConfig: %v", err)
 	}
-	if cfg.Agents.Defaults.LogLevel != "" {
+	// When config omits log_level, the DefaultConfig value ("fatal") is preserved.
-		t.Errorf("LogLevel = %q, want \"\"", cfg.Agents.Defaults.LogLevel)
+	if cfg.Agents.Defaults.LogLevel != "fatal" {
+		t.Errorf("LogLevel = %q, want \"fatal\"", cfg.Agents.Defaults.LogLevel)
 	}
 }

pkg/config/defaults.go

@@ -26,6 +26,7 @@ func DefaultConfig() *Config {
 	return &Config{
 		Agents: AgentsConfig{
 			Defaults: AgentDefaults{
+				LogLevel:                  "fatal",
 				Workspace:                 workspacePath,
 				RestrictToWorkspace:       true,
 				Provider:                  "",