Support configuring effort alongside model

internal/antigravity/session.go

@@ -32,6 +32,7 @@ type Options struct {
 	Dir        string
 	Cwd        string
 	Model      string
+	Effort     string
 	Resume     string
 	Env        []string
 	Guidance   string
@@ -120,6 +121,7 @@ type Session struct {
 	mu     sync.Mutex
 	p      *proc
 	model  string
+	effort string
 	killed bool
 	images int
 
@@ -152,6 +154,7 @@ func Start(ctx context.Context, opts Options) (*Session, error) {
 	s := &Session{
 		opts:    opts,
 		model:   opts.Model,
+		effort:  opts.Effort,
 		convID:  opts.Resume,
 		events:  make(chan Event, 256),
 		dead:    make(chan struct{}),
@@ -296,6 +299,9 @@ func (s *Session) spawnLocked() error {
 	if s.model != "" {
 		args = append(args, "--model", s.model)
 	}
+	if s.effort != "" {
+		args = append(args, "--effort", s.effort)
+	}
 	if id := s.ID(); id != "" {
 		args = append(args, "--conversation", id)
 	}
@@ -514,14 +520,15 @@ func (s *Session) Interrupt() error {
 	return nil
 }
 
-func (s *Session) SetModel(model string) error {
+func (s *Session) SetModel(model, effort string) error {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
-	if model == s.model {
+	if model == s.model && effort == s.effort {
 		return nil
 	}
 	s.model = model
+	s.effort = effort
 	s.p.expected = true
 	s.p.stdin.Close()
 	err := s.restartLocked()