fix: spawn and swarm bug fixes from MVP testing

- spawn.go: Parse bd show --json as array, fix issue_type json tag
- session/manager.go: Check filesystem directly in hasPolecat()
  to handle newly-created polecats
- swarm/manager.go: Use bd show to get children via dependents field
  instead of non-existent bd list --parent flag

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/cmd/spawn.go

@@ -60,7 +60,7 @@ type BeadsIssue struct {
 	Title       string `json:"title"`
 	Description string `json:"description"`
 	Priority    int    `json:"priority"`
-	Type        string `json:"type"`
+	Type        string `json:"issue_type"`
 	Status      string `json:"status"`
 }
 
@@ -256,12 +256,16 @@ func fetchBeadsIssue(rigPath, issueID string) (*BeadsIssue, error) {
 		return nil, err
 	}
 
-	var issue BeadsIssue
-	if err := json.Unmarshal(stdout.Bytes(), &issue); err != nil {
+	// bd show --json returns an array, take the first element
+	var issues []BeadsIssue
+	if err := json.Unmarshal(stdout.Bytes(), &issues); err != nil {
 		return nil, fmt.Errorf("parsing issue: %w", err)
 	}
+	if len(issues) == 0 {
+		return nil, fmt.Errorf("issue not found: %s", issueID)
+	}
 
-	return &issue, nil
+	return &issues[0], nil
 }
 
 // buildSpawnContext creates the initial context message for the polecat.

internal/session/manager.go

@@ -4,6 +4,7 @@ package session
 import (
 	"errors"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 	"time"
@@ -72,12 +73,13 @@ func (m *Manager) polecatDir(polecat string) string {
 
 // hasPolecat checks if the polecat exists in this rig.
 func (m *Manager) hasPolecat(polecat string) bool {
-	for _, p := range m.rig.Polecats {
-		if p == polecat {
-			return true
-		}
+	// Check filesystem directly to handle newly-created polecats
+	polecatPath := m.polecatDir(polecat)
+	info, err := os.Stat(polecatPath)
+	if err != nil {
+		return false
 	}
-	return false
+	return info.IsDir()
 }
 
 // Start creates and starts a new session for a polecat.

internal/swarm/manager.go

@@ -278,8 +278,8 @@ func isValidTransition(from, to SwarmState) bool {
 
 // loadTasksFromBeads loads child issues from beads CLI.
 func (m *Manager) loadTasksFromBeads(epicID string) ([]SwarmTask, error) {
-	// Run: bd list --parent <epicID> --json
-	cmd := exec.Command("bd", "list", "--parent", epicID, "--json")
+	// Run: bd show <epicID> --json to get epic with children
+	cmd := exec.Command("bd", "show", epicID, "--json")
 	cmd.Dir = m.workDir
 
 	var stdout, stderr bytes.Buffer
@@ -287,24 +287,39 @@ func (m *Manager) loadTasksFromBeads(epicID string) ([]SwarmTask, error) {
 	cmd.Stderr = &stderr
 
 	if err := cmd.Run(); err != nil {
-		return nil, fmt.Errorf("bd list: %s", strings.TrimSpace(stderr.String()))
+		return nil, fmt.Errorf("bd show: %s", strings.TrimSpace(stderr.String()))
 	}
 
-	// Parse JSON output
+	// Parse JSON output - bd show returns an array
 	var issues []struct {
-		ID     string `json:"id"`
-		Title  string `json:"title"`
-		Status string `json:"status"`
+		ID         string `json:"id"`
+		Title      string `json:"title"`
+		Status     string `json:"status"`
+		Dependents []struct {
+			ID             string `json:"id"`
+			Title          string `json:"title"`
+			Status         string `json:"status"`
+			DependencyType string `json:"dependency_type"`
+		} `json:"dependents"`
 	}
 
 	if err := json.Unmarshal(stdout.Bytes(), &issues); err != nil {
 		return nil, fmt.Errorf("parsing bd output: %w", err)
 	}
 
+	if len(issues) == 0 {
+		return nil, fmt.Errorf("epic not found: %s", epicID)
+	}
+
+	// Extract parent-child dependents as tasks
 	var tasks []SwarmTask
-	for _, issue := range issues {
+	for _, dep := range issues[0].Dependents {
+		if dep.DependencyType != "parent-child" {
+			continue
+		}
+
 		state := TaskPending
-		switch issue.Status {
+		switch dep.Status {
 		case "in_progress":
 			state = TaskInProgress
 		case "closed":
@@ -312,8 +327,8 @@ func (m *Manager) loadTasksFromBeads(epicID string) ([]SwarmTask, error) {
 		}
 
 		tasks = append(tasks, SwarmTask{
-			IssueID: issue.ID,
-			Title:   issue.Title,
+			IssueID: dep.ID,
+			Title:   dep.Title,
 			State:   state,
 		})
 	}