fix: make beads mount work with lazy initialization

- Changed NewServer to accept *BeadsFS instead of bd.Storage
- BeadsFS is always created but with no initial mounts
- Each mount opens its own store on-demand
- Added nil check in supervisor to handle missing beads gracefully

cmd/anvilsrv/main.go

@@ -211,8 +211,9 @@ func start(daemonize bool) {
 		}
 	}()
 
-	// Start 9P server
-	srv, err := p9.NewServer(mgr, nil)
+	// Start 9P server with empty beads filesystem (mounts created on-demand)
+	beadsFS := p9.NewBeadsFS(nil, context.Background())
+	srv, err := p9.NewServer(mgr, beadsFS)
 	if err != nil {
 		logging.Logger().Fatal("failed to start 9P server", zap.Error(err))
 	}

internal/backend/tmux/session.go

@@ -670,7 +670,6 @@ func (s *Session) Restart(ctx context.Context) error {
 	backendName := s.backendName
 	backendCommand := s.backendCommand
 	role := s.role
-	tasks := s.tasks
 	hadCrash := s.hadCrash
 	model := s.model
 	modelResolver := s.modelResolver
@@ -720,14 +719,6 @@ func (s *Session) Restart(ctx context.Context) error {
 	}
 	layers = append(layers, roleLayer)
 
-	for _, taskName := range tasks {
-		taskLayer, err := sandbox.LoadTask(taskName)
-		if err != nil {
-			return fmt.Errorf("failed to load task %q: %w", taskName, err)
-		}
-		layers = append(layers, taskLayer)
-	}
-
 	general := sandbox.GeneralConfig{BestEffort: false, LogLevel: "error"}
 	advanced := sandbox.AdvancedConfig{LDD: false, AddExec: true}
 	sandboxCfg := sandbox.Merge(general, advanced, layers...)

internal/backend/tmux/tmux.go

@@ -159,15 +159,6 @@ func (b *Backend) CreateSession(ctx context.Context, opts backend.SessionOptions
 	}
 	layers = append(layers, roleLayer)
 
-	// Add task layers
-	for _, taskName := range opts.Tasks {
-		taskLayer, err := sandbox.LoadTask(taskName)
-		if err != nil {
-			return nil, fmt.Errorf("failed to load task %q: %w", taskName, err)
-		}
-		layers = append(layers, taskLayer)
-	}
-
 	// Merge layers into final config
 	general := sandbox.GeneralConfig{
 		BestEffort: false,

internal/p9/server.go

@@ -24,7 +24,6 @@ import (
 	"sync"
 
 	"github.com/google/uuid"
-	bd "github.com/steveyegge/beads"
 	"go.uber.org/zap"
 
 	"9fans.net/go/plan9"
@@ -150,7 +149,7 @@ type fid struct {
 }
 
 // NewServer creates and starts the 9P server.
-func NewServer(mgr *session.Manager, beadsStore bd.Storage) (*Server, error) {
+func NewServer(mgr *session.Manager, beadsFS *BeadsFS) (*Server, error) {
 	ns := client.Namespace()
 	if ns == "" {
 		return nil, fmt.Errorf("no namespace")
@@ -173,12 +172,6 @@ func NewServer(mgr *session.Manager, beadsStore bd.Storage) (*Server, error) {
 		return nil, err
 	}
 
-	// Create BeadsFS (shared across all namespaces)
-	var beadsFS *BeadsFS
-	if beadsStore != nil {
-		beadsFS = NewBeadsFS(beadsStore, context.Background())
-	}
-
 	// Load tools from anvilmcp
 	tools := loadMCPTools()
 	toolsFS := NewToolsFS(tools)

internal/supervisor/supervisor.go

@@ -27,6 +27,11 @@ func New(s *session.Manager, b *p9.BeadsFS, m *mailbox.Manager, e *eventbus.Bus)
 }
 
 func (s *Supervisor) assignWork() {
+	// Skip if beads not available
+	if s.beads == nil {
+		return
+	}
+	
 	// Get all claimable tasks from all projects
 	ready, err := s.beads.Read("ready")
 	if err != nil || len(ready) == 0 {