fix: create mayor/daemon.json during gt start and gt doctor --fix (#225)

* fix: create mayor/daemon.json during gt start and gt doctor --fix (#5)

- Add DaemonPatrolConfig type with heartbeat and patrol settings
- Add Load/Save/Ensure functions for daemon patrol config
- Create daemon.json in gt start (non-fatal if fails)
- Make PatrolHooksWiredCheck fixable with Fix() method
- Add comprehensive tests for both config and doctor checks

This fixes the issue where gt doctor expects mayor/daemon.json to exist
but it was never created by gt start or any other command.

* refactor: use constants.DirMayor instead of hardcoded string

internal/cmd/start.go

@@ -145,6 +145,10 @@ func runStart(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("not in a Gas Town workspace: %w", err)
 	}
 
+	if err := config.EnsureDaemonPatrolConfig(townRoot); err != nil {
+		fmt.Printf("  %s Could not ensure daemon config: %v\n", style.Dim.Render("○"), err)
+	}
+
 	t := tmux.NewTmux()
 
 	fmt.Printf("Starting Gas Town from %s\n\n", style.Dim.Render(townRoot))

internal/config/loader.go

@@ -9,6 +9,8 @@ import (
 	"sort"
 	"strings"
 	"time"
+
+	"github.com/steveyegge/gastown/internal/constants"
 )
 
 var (
@@ -368,6 +370,77 @@ func NewMayorConfig() *MayorConfig {
 	}
 }
 
+// DaemonPatrolConfigPath returns the path to the daemon patrol config file.
+func DaemonPatrolConfigPath(townRoot string) string {
+	return filepath.Join(townRoot, constants.DirMayor, DaemonPatrolConfigFileName)
+}
+
+// LoadDaemonPatrolConfig loads and validates a daemon patrol config file.
+func LoadDaemonPatrolConfig(path string) (*DaemonPatrolConfig, error) {
+	data, err := os.ReadFile(path) //nolint:gosec // G304: path is constructed internally
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, fmt.Errorf("%w: %s", ErrNotFound, path)
+		}
+		return nil, fmt.Errorf("reading daemon patrol config: %w", err)
+	}
+
+	var config DaemonPatrolConfig
+	if err := json.Unmarshal(data, &config); err != nil {
+		return nil, fmt.Errorf("parsing daemon patrol config: %w", err)
+	}
+
+	if err := validateDaemonPatrolConfig(&config); err != nil {
+		return nil, err
+	}
+
+	return &config, nil
+}
+
+// SaveDaemonPatrolConfig saves a daemon patrol config to a file.
+func SaveDaemonPatrolConfig(path string, config *DaemonPatrolConfig) error {
+	if err := validateDaemonPatrolConfig(config); err != nil {
+		return err
+	}
+
+	if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+		return fmt.Errorf("creating directory: %w", err)
+	}
+
+	data, err := json.MarshalIndent(config, "", "  ")
+	if err != nil {
+		return fmt.Errorf("encoding daemon patrol config: %w", err)
+	}
+
+	if err := os.WriteFile(path, data, 0644); err != nil { //nolint:gosec // G306: config files don't contain secrets
+		return fmt.Errorf("writing daemon patrol config: %w", err)
+	}
+
+	return nil
+}
+
+func validateDaemonPatrolConfig(c *DaemonPatrolConfig) error {
+	if c.Type != "daemon-patrol-config" && c.Type != "" {
+		return fmt.Errorf("%w: expected type 'daemon-patrol-config', got '%s'", ErrInvalidType, c.Type)
+	}
+	if c.Version > CurrentDaemonPatrolConfigVersion {
+		return fmt.Errorf("%w: got %d, max supported %d", ErrInvalidVersion, c.Version, CurrentDaemonPatrolConfigVersion)
+	}
+	return nil
+}
+
+// EnsureDaemonPatrolConfig creates the daemon patrol config if it doesn't exist.
+func EnsureDaemonPatrolConfig(townRoot string) error {
+	path := DaemonPatrolConfigPath(townRoot)
+	if _, err := os.Stat(path); err != nil {
+		if !os.IsNotExist(err) {
+			return fmt.Errorf("checking daemon patrol config: %w", err)
+		}
+		return SaveDaemonPatrolConfig(path, NewDaemonPatrolConfig())
+	}
+	return nil
+}
+
 // LoadAccountsConfig loads and validates an accounts configuration file.
 func LoadAccountsConfig(path string) (*AccountsConfig, error) {
 	data, err := os.ReadFile(path) //nolint:gosec // G304: path is constructed internally, not from user input

internal/config/loader_test.go

@@ -971,6 +971,214 @@ func TestLoadRuntimeConfigFallsBackToDefaults(t *testing.T) {
 	}
 }
 
+func TestDaemonPatrolConfigRoundTrip(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "mayor", "daemon.json")
+
+	original := NewDaemonPatrolConfig()
+	original.Patrols["custom"] = PatrolConfig{
+		Enabled:  true,
+		Interval: "10m",
+		Agent:    "custom-agent",
+	}
+
+	if err := SaveDaemonPatrolConfig(path, original); err != nil {
+		t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+	}
+
+	loaded, err := LoadDaemonPatrolConfig(path)
+	if err != nil {
+		t.Fatalf("LoadDaemonPatrolConfig: %v", err)
+	}
+
+	if loaded.Type != "daemon-patrol-config" {
+		t.Errorf("Type = %q, want 'daemon-patrol-config'", loaded.Type)
+	}
+	if loaded.Version != CurrentDaemonPatrolConfigVersion {
+		t.Errorf("Version = %d, want %d", loaded.Version, CurrentDaemonPatrolConfigVersion)
+	}
+	if loaded.Heartbeat == nil || !loaded.Heartbeat.Enabled {
+		t.Error("Heartbeat not preserved")
+	}
+	if len(loaded.Patrols) != 4 {
+		t.Errorf("Patrols count = %d, want 4", len(loaded.Patrols))
+	}
+	if custom, ok := loaded.Patrols["custom"]; !ok || custom.Agent != "custom-agent" {
+		t.Error("custom patrol not preserved")
+	}
+}
+
+func TestDaemonPatrolConfigValidation(t *testing.T) {
+	tests := []struct {
+		name    string
+		config  *DaemonPatrolConfig
+		wantErr bool
+	}{
+		{
+			name:    "valid default config",
+			config:  NewDaemonPatrolConfig(),
+			wantErr: false,
+		},
+		{
+			name: "valid minimal config",
+			config: &DaemonPatrolConfig{
+				Type:    "daemon-patrol-config",
+				Version: 1,
+			},
+			wantErr: false,
+		},
+		{
+			name: "wrong type",
+			config: &DaemonPatrolConfig{
+				Type:    "wrong",
+				Version: 1,
+			},
+			wantErr: true,
+		},
+		{
+			name: "future version rejected",
+			config: &DaemonPatrolConfig{
+				Type:    "daemon-patrol-config",
+				Version: 999,
+			},
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := validateDaemonPatrolConfig(tt.config)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("validateDaemonPatrolConfig() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestLoadDaemonPatrolConfigNotFound(t *testing.T) {
+	_, err := LoadDaemonPatrolConfig("/nonexistent/path.json")
+	if err == nil {
+		t.Fatal("expected error for nonexistent file")
+	}
+}
+
+func TestDaemonPatrolConfigPath(t *testing.T) {
+	tests := []struct {
+		townRoot string
+		expected string
+	}{
+		{"/home/user/gt", "/home/user/gt/mayor/daemon.json"},
+		{"/var/lib/gastown", "/var/lib/gastown/mayor/daemon.json"},
+		{"/tmp/test-workspace", "/tmp/test-workspace/mayor/daemon.json"},
+		{"~/gt", "~/gt/mayor/daemon.json"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.townRoot, func(t *testing.T) {
+			path := DaemonPatrolConfigPath(tt.townRoot)
+			if path != tt.expected {
+				t.Errorf("DaemonPatrolConfigPath(%q) = %q, want %q", tt.townRoot, path, tt.expected)
+			}
+		})
+	}
+}
+
+func TestEnsureDaemonPatrolConfig(t *testing.T) {
+	t.Run("creates config if missing", func(t *testing.T) {
+		dir := t.TempDir()
+		if err := os.MkdirAll(filepath.Join(dir, "mayor"), 0755); err != nil {
+			t.Fatalf("creating mayor dir: %v", err)
+		}
+
+		err := EnsureDaemonPatrolConfig(dir)
+		if err != nil {
+			t.Fatalf("EnsureDaemonPatrolConfig: %v", err)
+		}
+
+		path := DaemonPatrolConfigPath(dir)
+		loaded, err := LoadDaemonPatrolConfig(path)
+		if err != nil {
+			t.Fatalf("LoadDaemonPatrolConfig: %v", err)
+		}
+		if loaded.Type != "daemon-patrol-config" {
+			t.Errorf("Type = %q, want 'daemon-patrol-config'", loaded.Type)
+		}
+		if len(loaded.Patrols) != 3 {
+			t.Errorf("Patrols count = %d, want 3 (deacon, witness, refinery)", len(loaded.Patrols))
+		}
+	})
+
+	t.Run("preserves existing config", func(t *testing.T) {
+		dir := t.TempDir()
+		path := filepath.Join(dir, "mayor", "daemon.json")
+
+		existing := &DaemonPatrolConfig{
+			Type:    "daemon-patrol-config",
+			Version: 1,
+			Patrols: map[string]PatrolConfig{
+				"custom-only": {Enabled: true, Agent: "custom"},
+			},
+		}
+		if err := SaveDaemonPatrolConfig(path, existing); err != nil {
+			t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+		}
+
+		err := EnsureDaemonPatrolConfig(dir)
+		if err != nil {
+			t.Fatalf("EnsureDaemonPatrolConfig: %v", err)
+		}
+
+		loaded, err := LoadDaemonPatrolConfig(path)
+		if err != nil {
+			t.Fatalf("LoadDaemonPatrolConfig: %v", err)
+		}
+		if len(loaded.Patrols) != 1 {
+			t.Errorf("Patrols count = %d, want 1 (should preserve existing)", len(loaded.Patrols))
+		}
+		if _, ok := loaded.Patrols["custom-only"]; !ok {
+			t.Error("existing custom patrol was overwritten")
+		}
+	})
+
+}
+
+func TestNewDaemonPatrolConfig(t *testing.T) {
+	cfg := NewDaemonPatrolConfig()
+
+	if cfg.Type != "daemon-patrol-config" {
+		t.Errorf("Type = %q, want 'daemon-patrol-config'", cfg.Type)
+	}
+	if cfg.Version != CurrentDaemonPatrolConfigVersion {
+		t.Errorf("Version = %d, want %d", cfg.Version, CurrentDaemonPatrolConfigVersion)
+	}
+	if cfg.Heartbeat == nil {
+		t.Fatal("Heartbeat is nil")
+	}
+	if !cfg.Heartbeat.Enabled {
+		t.Error("Heartbeat.Enabled should be true by default")
+	}
+	if cfg.Heartbeat.Interval != "3m" {
+		t.Errorf("Heartbeat.Interval = %q, want '3m'", cfg.Heartbeat.Interval)
+	}
+	if len(cfg.Patrols) != 3 {
+		t.Errorf("Patrols count = %d, want 3", len(cfg.Patrols))
+	}
+
+	for _, name := range []string{"deacon", "witness", "refinery"} {
+		patrol, ok := cfg.Patrols[name]
+		if !ok {
+			t.Errorf("missing %s patrol", name)
+			continue
+		}
+		if !patrol.Enabled {
+			t.Errorf("%s patrol should be enabled by default", name)
+		}
+		if patrol.Agent != name {
+			t.Errorf("%s patrol Agent = %q, want %q", name, patrol.Agent, name)
+		}
+	}
+}
+
 func TestSaveTownSettings(t *testing.T) {
 	t.Run("saves valid town settings", func(t *testing.T) {
 		tmpDir := t.TempDir()

internal/config/types.go

@@ -66,6 +66,63 @@ type DaemonConfig struct {
 	PollInterval      string `json:"poll_interval,omitempty"`      // e.g., "10s"
 }
 
+// DaemonPatrolConfig represents the daemon patrol configuration (mayor/daemon.json).
+// This configures how patrols are triggered and managed.
+type DaemonPatrolConfig struct {
+	Type      string                  `json:"type"`                // "daemon-patrol-config"
+	Version   int                     `json:"version"`             // schema version
+	Heartbeat *HeartbeatConfig        `json:"heartbeat,omitempty"` // heartbeat settings
+	Patrols   map[string]PatrolConfig `json:"patrols,omitempty"`   // named patrol configurations
+}
+
+// HeartbeatConfig represents heartbeat settings for daemon.
+type HeartbeatConfig struct {
+	Enabled  bool   `json:"enabled"`            // whether heartbeat is enabled
+	Interval string `json:"interval,omitempty"` // e.g., "3m"
+}
+
+// PatrolConfig represents a single patrol configuration.
+type PatrolConfig struct {
+	Enabled  bool   `json:"enabled"`            // whether this patrol is enabled
+	Interval string `json:"interval,omitempty"` // e.g., "5m"
+	Agent    string `json:"agent,omitempty"`    // agent that runs this patrol
+}
+
+// CurrentDaemonPatrolConfigVersion is the current schema version for DaemonPatrolConfig.
+const CurrentDaemonPatrolConfigVersion = 1
+
+// DaemonPatrolConfigFileName is the filename for daemon patrol configuration.
+const DaemonPatrolConfigFileName = "daemon.json"
+
+// NewDaemonPatrolConfig creates a new DaemonPatrolConfig with sensible defaults.
+func NewDaemonPatrolConfig() *DaemonPatrolConfig {
+	return &DaemonPatrolConfig{
+		Type:    "daemon-patrol-config",
+		Version: CurrentDaemonPatrolConfigVersion,
+		Heartbeat: &HeartbeatConfig{
+			Enabled:  true,
+			Interval: "3m",
+		},
+		Patrols: map[string]PatrolConfig{
+			"deacon": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "deacon",
+			},
+			"witness": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "witness",
+			},
+			"refinery": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "refinery",
+			},
+		},
+	}
+}
+
 // DeaconConfig represents deacon process settings.
 type DeaconConfig struct {
 	PatrolInterval string `json:"patrol_interval,omitempty"` // e.g., "5m"

internal/doctor/patrol_check.go

@@ -145,34 +145,36 @@ func getPatrolMoleculeDesc(title string) string {
 
 // PatrolHooksWiredCheck verifies that hooks trigger patrol execution.
 type PatrolHooksWiredCheck struct {
-	BaseCheck
+	FixableCheck
 }
 
 // NewPatrolHooksWiredCheck creates a new patrol hooks wired check.
 func NewPatrolHooksWiredCheck() *PatrolHooksWiredCheck {
 	return &PatrolHooksWiredCheck{
+		FixableCheck: FixableCheck{
 			BaseCheck: BaseCheck{
 				CheckName:        "patrol-hooks-wired",
 				CheckDescription: "Check if hooks trigger patrol execution",
 			},
+		},
 	}
 }
 
 // Run checks if patrol hooks are wired.
 func (c *PatrolHooksWiredCheck) Run(ctx *CheckContext) *CheckResult {
-	// Check for daemon config which manages patrols
+	daemonConfigPath := config.DaemonPatrolConfigPath(ctx.TownRoot)
-	daemonConfigPath := filepath.Join(ctx.TownRoot, "mayor", "daemon.json")
+	relPath, _ := filepath.Rel(ctx.TownRoot, daemonConfigPath)
+
 	if _, err := os.Stat(daemonConfigPath); os.IsNotExist(err) {
 		return &CheckResult{
 			Name:    c.Name(),
 			Status:  StatusWarning,
-			Message: "Daemon config not found",
+			Message: fmt.Sprintf("%s not found", relPath),
-			FixHint: "Run 'gt daemon start' to start the daemon",
+			FixHint: "Run 'gt doctor --fix' to create default config, or 'gt daemon start' to start the daemon",
 		}
 	}
 
-	// Check daemon config for patrol configuration
+	cfg, err := config.LoadDaemonPatrolConfig(daemonConfigPath)
-	data, err := os.ReadFile(daemonConfigPath)
 	if err != nil {
 		return &CheckResult{
 			Name:    c.Name(),
@@ -182,48 +184,35 @@ func (c *PatrolHooksWiredCheck) Run(ctx *CheckContext) *CheckResult {
 		}
 	}
 
-	var config map[string]interface{}
+	if len(cfg.Patrols) > 0 {
-	if err := json.Unmarshal(data, &config); err != nil {
-		return &CheckResult{
-			Name:    c.Name(),
-			Status:  StatusWarning,
-			Message: "Invalid daemon config format",
-			Details: []string{err.Error()},
-		}
-	}
-
-	// Check for patrol entries
-	if patrols, ok := config["patrols"]; ok {
-		if patrolMap, ok := patrols.(map[string]interface{}); ok && len(patrolMap) > 0 {
 		return &CheckResult{
 			Name:    c.Name(),
 			Status:  StatusOK,
-				Message: fmt.Sprintf("Daemon configured with %d patrol(s)", len(patrolMap)),
+			Message: fmt.Sprintf("Daemon configured with %d patrol(s)", len(cfg.Patrols)),
-			}
 		}
 	}
 
-	// Check if heartbeat is enabled (triggers deacon patrol)
+	if cfg.Heartbeat != nil && cfg.Heartbeat.Enabled {
-	if heartbeat, ok := config["heartbeat"]; ok {
-		if hb, ok := heartbeat.(map[string]interface{}); ok {
-			if enabled, ok := hb["enabled"].(bool); ok && enabled {
 		return &CheckResult{
 			Name:    c.Name(),
 			Status:  StatusOK,
 			Message: "Daemon heartbeat enabled (triggers patrols)",
 		}
 	}
-		}
-	}
 
 	return &CheckResult{
 		Name:    c.Name(),
 		Status:  StatusWarning,
-		Message: "Patrol hooks not configured in daemon",
+		Message: fmt.Sprintf("Configure patrols in %s or run 'gt daemon start'", relPath),
-		FixHint: "Configure patrols in mayor/daemon.json or run 'gt daemon start'",
+		FixHint: "Run 'gt doctor --fix' to create default config",
 	}
 }
 
+// Fix creates the daemon patrol config with defaults.
+func (c *PatrolHooksWiredCheck) Fix(ctx *CheckContext) error {
+	return config.EnsureDaemonPatrolConfig(ctx.TownRoot)
+}
+
 // PatrolNotStuckCheck detects wisps that have been in_progress too long.
 type PatrolNotStuckCheck struct {
 	BaseCheck

internal/doctor/patrol_check_test.go

@@ -359,3 +359,183 @@ func TestPatrolRolesHavePromptsCheck_EmptyRigsConfig(t *testing.T) {
 		t.Errorf("Message = %q, want 'No rigs configured'", result.Message)
 	}
 }
+
+func TestNewPatrolHooksWiredCheck(t *testing.T) {
+	check := NewPatrolHooksWiredCheck()
+	if check == nil {
+		t.Fatal("NewPatrolHooksWiredCheck() returned nil")
+	}
+	if check.Name() != "patrol-hooks-wired" {
+		t.Errorf("Name() = %q, want %q", check.Name(), "patrol-hooks-wired")
+	}
+	if !check.CanFix() {
+		t.Error("CanFix() should return true")
+	}
+}
+
+func TestPatrolHooksWiredCheck_NoDaemonConfig(t *testing.T) {
+	tmpDir := t.TempDir()
+	mayorDir := filepath.Join(tmpDir, "mayor")
+	if err := os.MkdirAll(mayorDir, 0755); err != nil {
+		t.Fatalf("mkdir mayor: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+
+	if result.Status != StatusWarning {
+		t.Errorf("Status = %v, want Warning", result.Status)
+	}
+	if result.FixHint == "" {
+		t.Error("FixHint should not be empty")
+	}
+}
+
+func TestPatrolHooksWiredCheck_ValidConfig(t *testing.T) {
+	tmpDir := t.TempDir()
+
+	cfg := config.NewDaemonPatrolConfig()
+	path := config.DaemonPatrolConfigPath(tmpDir)
+	if err := config.SaveDaemonPatrolConfig(path, cfg); err != nil {
+		t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+
+	if result.Status != StatusOK {
+		t.Errorf("Status = %v, want OK", result.Status)
+	}
+}
+
+func TestPatrolHooksWiredCheck_EmptyPatrols(t *testing.T) {
+	tmpDir := t.TempDir()
+
+	cfg := &config.DaemonPatrolConfig{
+		Type:    "daemon-patrol-config",
+		Version: 1,
+		Patrols: map[string]config.PatrolConfig{},
+	}
+	path := config.DaemonPatrolConfigPath(tmpDir)
+	if err := config.SaveDaemonPatrolConfig(path, cfg); err != nil {
+		t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+
+	if result.Status != StatusWarning {
+		t.Errorf("Status = %v, want Warning (no patrols configured)", result.Status)
+	}
+}
+
+func TestPatrolHooksWiredCheck_HeartbeatEnabled(t *testing.T) {
+	tmpDir := t.TempDir()
+
+	cfg := &config.DaemonPatrolConfig{
+		Type:    "daemon-patrol-config",
+		Version: 1,
+		Heartbeat: &config.HeartbeatConfig{
+			Enabled:  true,
+			Interval: "3m",
+		},
+		Patrols: map[string]config.PatrolConfig{},
+	}
+	path := config.DaemonPatrolConfigPath(tmpDir)
+	if err := config.SaveDaemonPatrolConfig(path, cfg); err != nil {
+		t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+
+	if result.Status != StatusOK {
+		t.Errorf("Status = %v, want OK (heartbeat enabled triggers patrols)", result.Status)
+	}
+}
+
+func TestPatrolHooksWiredCheck_Fix(t *testing.T) {
+	tmpDir := t.TempDir()
+	mayorDir := filepath.Join(tmpDir, "mayor")
+	if err := os.MkdirAll(mayorDir, 0755); err != nil {
+		t.Fatalf("mkdir mayor: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+	if result.Status != StatusWarning {
+		t.Fatalf("Initial Status = %v, want Warning", result.Status)
+	}
+
+	err := check.Fix(ctx)
+	if err != nil {
+		t.Fatalf("Fix() error = %v", err)
+	}
+
+	path := config.DaemonPatrolConfigPath(tmpDir)
+	loaded, err := config.LoadDaemonPatrolConfig(path)
+	if err != nil {
+		t.Fatalf("LoadDaemonPatrolConfig: %v", err)
+	}
+	if loaded.Type != "daemon-patrol-config" {
+		t.Errorf("Type = %q, want 'daemon-patrol-config'", loaded.Type)
+	}
+	if len(loaded.Patrols) != 3 {
+		t.Errorf("Patrols count = %d, want 3", len(loaded.Patrols))
+	}
+
+	result = check.Run(ctx)
+	if result.Status != StatusOK {
+		t.Errorf("After Fix(), Status = %v, want OK", result.Status)
+	}
+}
+
+func TestPatrolHooksWiredCheck_FixPreservesExisting(t *testing.T) {
+	tmpDir := t.TempDir()
+
+	existing := &config.DaemonPatrolConfig{
+		Type:    "daemon-patrol-config",
+		Version: 1,
+		Patrols: map[string]config.PatrolConfig{
+			"custom": {Enabled: true, Agent: "custom-agent"},
+		},
+	}
+	path := config.DaemonPatrolConfigPath(tmpDir)
+	if err := config.SaveDaemonPatrolConfig(path, existing); err != nil {
+		t.Fatalf("SaveDaemonPatrolConfig: %v", err)
+	}
+
+	check := NewPatrolHooksWiredCheck()
+	ctx := &CheckContext{TownRoot: tmpDir}
+
+	result := check.Run(ctx)
+	if result.Status != StatusOK {
+		t.Errorf("Status = %v, want OK (has patrols)", result.Status)
+	}
+
+	err := check.Fix(ctx)
+	if err != nil {
+		t.Fatalf("Fix() error = %v", err)
+	}
+
+	loaded, err := config.LoadDaemonPatrolConfig(path)
+	if err != nil {
+		t.Fatalf("LoadDaemonPatrolConfig: %v", err)
+	}
+	if len(loaded.Patrols) != 1 {
+		t.Errorf("Patrols count = %d, want 1 (should preserve existing)", len(loaded.Patrols))
+	}
+	if _, ok := loaded.Patrols["custom"]; !ok {
+		t.Error("existing custom patrol was overwritten")
+	}
+}