feat(doctor): make stale closed issues check configurable (#1291)

Add stale_closed_issues_days config option to metadata.json:
- 0 (default): Check disabled - repos keep unlimited beads
- >0: Enable check with specified day threshold

Design philosophy: Time-based cleanup is a crude proxy for the real
concern (database size). Disabled by default since a repo with 100
closed issues from 5 years ago doesn't need cleanup.

Also adds a warning when check is disabled but database has >10,000
closed issues, recommending users enable the threshold.

Co-Authored-By: SageOx <ox@sageox.ai>

Executed-By: beads/crew/emma
Rig: beads
Role: crew

cmd/bd/doctor/fix/maintenance.go

@@ -15,9 +15,6 @@ import (
 	"github.com/steveyegge/beads/internal/types"
 )
 
-// DefaultCleanupAgeDays is the default age threshold for cleanup
-const DefaultCleanupAgeDays = 30
-
 // CleanupResult contains the results of a cleanup operation
 type CleanupResult struct {
 	DeletedCount   int
@@ -27,6 +24,9 @@ type CleanupResult struct {
 
 // StaleClosedIssues converts stale closed issues to tombstones.
 // This is the fix handler for the "Stale Closed Issues" doctor check.
+//
+// This fix is DISABLED by default (stale_closed_issues_days=0). Users must
+// explicitly set a positive threshold in metadata.json to enable cleanup.
 func StaleClosedIssues(path string) error {
 	if err := validateBeadsWorkspace(path); err != nil {
 		return err
@@ -34,9 +34,26 @@ func StaleClosedIssues(path string) error {
 
 	beadsDir := filepath.Join(path, ".beads")
 
+	// Load config and check if cleanup is enabled
+	cfg, err := configfile.Load(beadsDir)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	// Get threshold; 0 means disabled
+	var thresholdDays int
+	if cfg != nil {
+		thresholdDays = cfg.GetStaleClosedIssuesDays()
+	}
+
+	if thresholdDays == 0 {
+		fmt.Println("  Stale closed issues cleanup disabled (set stale_closed_issues_days to enable)")
+		return nil
+	}
+
 	// Get database path
 	var dbPath string
-	if cfg, err := configfile.Load(beadsDir); err == nil && cfg != nil && cfg.Database != "" {
+	if cfg != nil && cfg.Database != "" {
 		dbPath = cfg.DatabasePath(beadsDir)
 	} else {
 		dbPath = filepath.Join(beadsDir, beads.CanonicalDatabaseName)
@@ -54,8 +71,8 @@ func StaleClosedIssues(path string) error {
 	}
 	defer func() { _ = store.Close() }()
 
-	// Find closed issues older than threshold
-	cutoff := time.Now().AddDate(0, 0, -DefaultCleanupAgeDays)
+	// Find closed issues older than configured threshold
+	cutoff := time.Now().AddDate(0, 0, -thresholdDays)
 	statusClosed := types.StatusClosed
 	filter := types.IssueFilter{
 		Status:       &statusClosed,
@@ -86,7 +103,7 @@ func StaleClosedIssues(path string) error {
 		fmt.Println("  No stale closed issues to clean up")
 	} else {
 		if deleted > 0 {
-			fmt.Printf("  Cleaned up %d stale closed issue(s)\n", deleted)
+			fmt.Printf("  Cleaned up %d stale closed issue(s) (older than %d days)\n", deleted, thresholdDays)
 		}
 		if skipped > 0 {
 			fmt.Printf("  Skipped %d pinned issue(s)\n", skipped)

cmd/bd/doctor/maintenance.go

@@ -15,18 +15,44 @@ import (
 	"github.com/steveyegge/beads/internal/types"
 )
 
-// DefaultCleanupAgeDays is the default age threshold for cleanup suggestions
-const DefaultCleanupAgeDays = 30
-
 // CheckStaleClosedIssues detects closed issues that could be cleaned up.
-// This consolidates the cleanup command into doctor checks.
+//
+// Design note: Time-based thresholds are a crude proxy for the real concern,
+// which is database size. A repo with 100 closed issues from 5 years ago
+// doesn't need cleanup, while 50,000 issues from yesterday might.
+// The actual threshold should be based on acceptable maximum database size.
+//
+// This check is DISABLED by default (stale_closed_issues_days=0). Users who
+// want time-based pruning must explicitly enable it in metadata.json.
+// Future: Consider adding max_database_size_mb for size-based thresholds.
+
+// largeClosedIssuesThreshold triggers a warning to enable stale cleanup
+const largeClosedIssuesThreshold = 10000
+
 func CheckStaleClosedIssues(path string) DoctorCheck {
 	// Follow redirect to resolve actual beads directory
 	beadsDir := resolveBeadsDir(filepath.Join(path, ".beads"))
 
-	// Check metadata.json first for custom database name
+	// Load config and check if this check is enabled
+	cfg, err := configfile.Load(beadsDir)
+	if err != nil {
+		return DoctorCheck{
+			Name:     "Stale Closed Issues",
+			Status:   StatusOK,
+			Message:  "N/A (config error)",
+			Category: CategoryMaintenance,
+		}
+	}
+
+	// If config is nil, use defaults (check disabled)
+	var thresholdDays int
+	if cfg != nil {
+		thresholdDays = cfg.GetStaleClosedIssuesDays()
+	}
+
+	// Get database path
 	var dbPath string
-	if cfg, err := configfile.Load(beadsDir); err == nil && cfg != nil && cfg.Database != "" {
+	if cfg != nil && cfg.Database != "" {
 		dbPath = cfg.DatabasePath(beadsDir)
 	} else {
 		dbPath = filepath.Join(beadsDir, beads.CanonicalDatabaseName)
@@ -53,8 +79,32 @@ func CheckStaleClosedIssues(path string) DoctorCheck {
 	}
 	defer func() { _ = store.Close() }()
 
-	// Find closed issues older than threshold
-	cutoff := time.Now().AddDate(0, 0, -DefaultCleanupAgeDays)
+	// If disabled (0), check for large closed issue count and warn if appropriate
+	if thresholdDays == 0 {
+		statusClosed := types.StatusClosed
+		filter := types.IssueFilter{Status: &statusClosed}
+		issues, err := store.SearchIssues(ctx, "", filter)
+		if err != nil || len(issues) < largeClosedIssuesThreshold {
+			return DoctorCheck{
+				Name:     "Stale Closed Issues",
+				Status:   StatusOK,
+				Message:  "Disabled (set stale_closed_issues_days to enable)",
+				Category: CategoryMaintenance,
+			}
+		}
+		// Large number of closed issues - recommend enabling cleanup
+		return DoctorCheck{
+			Name:     "Stale Closed Issues",
+			Status:   StatusWarning,
+			Message:  fmt.Sprintf("Disabled but %d closed issues exist", len(issues)),
+			Detail:   "Consider enabling stale_closed_issues_days to manage database size",
+			Fix:      "Add \"stale_closed_issues_days\": 30 to .beads/metadata.json",
+			Category: CategoryMaintenance,
+		}
+	}
+
+	// Find closed issues older than configured threshold
+	cutoff := time.Now().AddDate(0, 0, -thresholdDays)
 	statusClosed := types.StatusClosed
 	filter := types.IssueFilter{
 		Status:       &statusClosed,
@@ -91,7 +141,7 @@ func CheckStaleClosedIssues(path string) DoctorCheck {
 	return DoctorCheck{
 		Name:     "Stale Closed Issues",
 		Status:   StatusWarning,
-		Message:  fmt.Sprintf("%d closed issue(s) older than %d days", cleanable, DefaultCleanupAgeDays),
+		Message:  fmt.Sprintf("%d closed issue(s) older than %d days", cleanable, thresholdDays),
 		Detail:   "These issues can be cleaned up to reduce database size",
 		Fix:      "Run 'bd doctor --fix' to cleanup, or 'bd admin cleanup --force' for more options",
 		Category: CategoryMaintenance,