feat: add overseer experience commands (gt focus, gt attention)

Implements the Overseer Experience epic (gt-k0kn):

- gt focus: Shows stalest high-priority goals, sorted by priority × staleness
- gt attention: Shows blocked items, PRs awaiting review, stuck workers
- gt status: Now includes GOALS and ATTENTION summary sections
- gt convoy list: Added --orphans, --epic, --by-epic flags

These commands reduce Mayor bottleneck by giving the overseer direct
visibility into system state without needing to ask Mayor.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/convoy.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"sort"
 	"strconv"
 	"strings"
 	"sync"
@@ -69,6 +70,9 @@ var (
 	convoyListStatus   string
 	convoyListAll      bool
 	convoyListTree     bool
+	convoyListOrphans  bool
+	convoyListEpic     string
+	convoyListByEpic   bool
 	convoyInteractive  bool
 	convoyStrandedJSON bool
 	convoyCloseReason  string
@@ -159,6 +163,9 @@ Examples:
   gt convoy list --all        # All convoys (open + closed)
   gt convoy list --status=closed  # Recently landed
   gt convoy list --tree       # Show convoy + child status tree
+  gt convoy list --orphans    # Convoys with no parent epic
+  gt convoy list --epic gt-abc    # Convoys linked to specific epic
+  gt convoy list --by-epic    # Group convoys by parent epic
   gt convoy list --json`,
 	RunE: runConvoyList,
 }
@@ -253,6 +260,9 @@ func init() {
 	convoyListCmd.Flags().StringVar(&convoyListStatus, "status", "", "Filter by status (open, closed)")
 	convoyListCmd.Flags().BoolVar(&convoyListAll, "all", false, "Show all convoys (open and closed)")
 	convoyListCmd.Flags().BoolVar(&convoyListTree, "tree", false, "Show convoy + child status tree")
+	convoyListCmd.Flags().BoolVar(&convoyListOrphans, "orphans", false, "Show only orphan convoys (no parent epic)")
+	convoyListCmd.Flags().StringVar(&convoyListEpic, "epic", "", "Show convoys for a specific epic")
+	convoyListCmd.Flags().BoolVar(&convoyListByEpic, "by-epic", false, "Group convoys by parent epic")
 
 	// Interactive TUI flag (on parent command)
 	convoyCmd.Flags().BoolVarP(&convoyInteractive, "interactive", "i", false, "Interactive tree view")
@@ -1163,6 +1173,16 @@ func showAllConvoyStatus(townBeads string) error {
 	return nil
 }
 
+// convoyListItem holds convoy info for list display.
+type convoyListItem struct {
+	ID          string `json:"id"`
+	Title       string `json:"title"`
+	Status      string `json:"status"`
+	CreatedAt   string `json:"created_at"`
+	ParentEpic  string `json:"parent_epic,omitempty"`
+	Description string `json:"description,omitempty"`
+}
+
 func runConvoyList(cmd *cobra.Command, args []string) error {
 	townBeads, err := getTownBeadsDir()
 	if err != nil {
@@ -1187,16 +1207,58 @@ func runConvoyList(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("listing convoys: %w", err)
 	}
 
-	var convoys []struct {
-		ID        string `json:"id"`
-		Title     string `json:"title"`
-		Status    string `json:"status"`
-		CreatedAt string `json:"created_at"`
+	var rawConvoys []struct {
+		ID          string `json:"id"`
+		Title       string `json:"title"`
+		Status      string `json:"status"`
+		CreatedAt   string `json:"created_at"`
+		Description string `json:"description"`
 	}
-	if err := json.Unmarshal(stdout.Bytes(), &convoys); err != nil {
+	if err := json.Unmarshal(stdout.Bytes(), &rawConvoys); err != nil {
 		return fmt.Errorf("parsing convoy list: %w", err)
 	}
 
+	// Convert to convoyListItem and extract parent_epic from description
+	convoys := make([]convoyListItem, 0, len(rawConvoys))
+	for _, rc := range rawConvoys {
+		item := convoyListItem{
+			ID:          rc.ID,
+			Title:       rc.Title,
+			Status:      rc.Status,
+			CreatedAt:   rc.CreatedAt,
+			Description: rc.Description,
+		}
+		// Extract parent_epic from description (format: "Parent-Epic: xxx")
+		for _, line := range strings.Split(rc.Description, "\n") {
+			if strings.HasPrefix(line, "Parent-Epic: ") {
+				item.ParentEpic = strings.TrimPrefix(line, "Parent-Epic: ")
+				break
+			}
+		}
+		convoys = append(convoys, item)
+	}
+
+	// Apply filtering based on new flags
+	if convoyListOrphans {
+		// Filter to only orphan convoys (no parent epic)
+		filtered := make([]convoyListItem, 0)
+		for _, c := range convoys {
+			if c.ParentEpic == "" {
+				filtered = append(filtered, c)
+			}
+		}
+		convoys = filtered
+	} else if convoyListEpic != "" {
+		// Filter to convoys linked to specific epic
+		filtered := make([]convoyListItem, 0)
+		for _, c := range convoys {
+			if c.ParentEpic == convoyListEpic {
+				filtered = append(filtered, c)
+			}
+		}
+		convoys = filtered
+	}
+
 	if convoyListJSON {
 		enc := json.NewEncoder(os.Stdout)
 		enc.SetIndent("", "  ")
@@ -1204,26 +1266,133 @@ func runConvoyList(cmd *cobra.Command, args []string) error {
 	}
 
 	if len(convoys) == 0 {
-		fmt.Println("No convoys found.")
+		if convoyListOrphans {
+			fmt.Println("No orphan convoys found.")
+		} else if convoyListEpic != "" {
+			fmt.Printf("No convoys found for epic %s.\n", convoyListEpic)
+		} else {
+			fmt.Println("No convoys found.")
+		}
 		fmt.Println("Create a convoy with: gt convoy create <name> [issues...]")
 		return nil
 	}
 
+	// Group by epic view
+	if convoyListByEpic {
+		return printConvoysByEpic(townBeads, convoys)
+	}
+
 	// Tree view: show convoys with their child issues
 	if convoyListTree {
-		return printConvoyTree(townBeads, convoys)
+		return printConvoyTreeFromItems(townBeads, convoys)
 	}
 
 	fmt.Printf("%s\n\n", style.Bold.Render("Convoys"))
 	for i, c := range convoys {
 		status := formatConvoyStatus(c.Status)
-		fmt.Printf("  %d. 🚚 %s: %s %s\n", i+1, c.ID, c.Title, status)
+		epicSuffix := ""
+		if c.ParentEpic != "" {
+			epicSuffix = style.Dim.Render(fmt.Sprintf(" [%s]", c.ParentEpic))
+		}
+		fmt.Printf("  %d. 🚚 %s: %s %s%s\n", i+1, c.ID, c.Title, status, epicSuffix)
 	}
 	fmt.Printf("\nUse 'gt convoy status <id>' or 'gt convoy status <n>' for detailed view.\n")
 
 	return nil
 }
 
+// printConvoysByEpic groups and displays convoys by their parent epic.
+func printConvoysByEpic(townBeads string, convoys []convoyListItem) error {
+	// Group convoys by parent epic
+	byEpic := make(map[string][]convoyListItem)
+	for _, c := range convoys {
+		epic := c.ParentEpic
+		if epic == "" {
+			epic = "(No Epic)"
+		}
+		byEpic[epic] = append(byEpic[epic], c)
+	}
+
+	// Get sorted epic keys (No Epic last)
+	var epics []string
+	for epic := range byEpic {
+		if epic != "(No Epic)" {
+			epics = append(epics, epic)
+		}
+	}
+	sort.Strings(epics)
+	if _, ok := byEpic["(No Epic)"]; ok {
+		epics = append(epics, "(No Epic)")
+	}
+
+	// Print grouped output
+	for _, epic := range epics {
+		convoys := byEpic[epic]
+		fmt.Printf("%s (%d convoys)\n", style.Bold.Render(epic), len(convoys))
+		for _, c := range convoys {
+			status := formatConvoyStatus(c.Status)
+			fmt.Printf("  🚚 %s: %s %s\n", c.ID, c.Title, status)
+		}
+		fmt.Println()
+	}
+
+	return nil
+}
+
+// printConvoyTreeFromItems displays convoys with their child issues in a tree format.
+func printConvoyTreeFromItems(townBeads string, convoys []convoyListItem) error {
+	for _, c := range convoys {
+		// Get tracked issues for this convoy
+		tracked := getTrackedIssues(townBeads, c.ID)
+
+		// Count completed
+		completed := 0
+		for _, t := range tracked {
+			if t.Status == "closed" {
+				completed++
+			}
+		}
+
+		// Print convoy header with progress
+		total := len(tracked)
+		progress := ""
+		if total > 0 {
+			progress = fmt.Sprintf(" (%d/%d)", completed, total)
+		}
+		epicSuffix := ""
+		if c.ParentEpic != "" {
+			epicSuffix = style.Dim.Render(fmt.Sprintf(" [%s]", c.ParentEpic))
+		}
+		fmt.Printf("🚚 %s: %s%s%s\n", c.ID, c.Title, progress, epicSuffix)
+
+		// Print tracked issues as tree children
+		for i, t := range tracked {
+			// Determine tree connector
+			isLast := i == len(tracked)-1
+			connector := "├──"
+			if isLast {
+				connector = "└──"
+			}
+
+			// Status symbol: ✓ closed, ▶ in_progress/hooked, ○ other
+			status := "○"
+			switch t.Status {
+			case "closed":
+				status = "✓"
+			case "in_progress", "hooked":
+				status = "▶"
+			}
+
+			fmt.Printf("%s %s %s: %s\n", connector, status, t.ID, t.Title)
+		}
+
+		// Add blank line between convoys
+		fmt.Println()
+	}
+
+	return nil
+}
+
 // printConvoyTree displays convoys with their child issues in a tree format.
 func printConvoyTree(townBeads string, convoys []struct {
 	ID        string `json:"id"`