diff --git a/internal/agents/antigravity.go b/internal/agents/antigravity.go
index 7604577..348d70c 100644
--- a/internal/agents/antigravity.go
+++ b/internal/agents/antigravity.go
@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"log/slog"
 	"strings"
-	"sync"
 	"time"
 
 	"g.fc.run/ai/byre/internal/antigravity"
@@ -15,16 +14,11 @@ import (
 )
 
 type agySteps struct {
-	mu    sync.Mutex
 	text  map[int]*strings.Builder
 	tools map[string]bool
 }
 
-func newAgySteps() *agySteps {
-	return &agySteps{text: map[int]*strings.Builder{}, tools: map[string]bool{}}
-}
-
-func (m *Manager) handleAntigravity(ctx context.Context, l *live, p antigravityProcess, ev antigravity.Event) error {
+func (m *Manager) handleAntigravity(ctx context.Context, l *live, p antigravityProcess, steps *agySteps, ev antigravity.Event) error {
 	switch ev.Kind {
 	case "init":
 		return nil
@@ -34,7 +28,7 @@ func (m *Manager) handleAntigravity(ctx context.Context, l *live, p antigravityP
 		if err != nil {
 			return err
 		}
-		return m.agyStep(ctx, l, p, ev, su)
+		return m.agyStep(ctx, l, steps, ev, su)
 
 	case "result":
 		res, err := ev.Result()
@@ -52,24 +46,22 @@ func (m *Manager) handleAntigravity(ctx context.Context, l *live, p antigravityP
 	return m.emit(ctx, l, agentActor, "agent.vendor", raw)
 }
 
-func (m *Manager) agyStep(ctx context.Context, l *live, p antigravityProcess, ev antigravity.Event, su antigravity.StepUpdate) error {
+func (m *Manager) agyStep(ctx context.Context, l *live, steps *agySteps, ev antigravity.Event, su antigravity.StepUpdate) error {
 	switch su.StepType {
 	case "user_input":
 		return nil
 
 	case "agent_response":
-		p.steps.mu.Lock()
-		b := p.steps.text[su.StepIndex]
+		b := steps.text[su.StepIndex]
 		if b == nil {
 			b = &strings.Builder{}
-			p.steps.text[su.StepIndex] = b
+			steps.text[su.StepIndex] = b
 		}
 		b.WriteString(su.TextDelta)
 		done := su.State != "ACTIVE"
 		if done {
-			delete(p.steps.text, su.StepIndex)
+			delete(steps.text, su.StepIndex)
 		}
-		p.steps.mu.Unlock()
 
 		if su.TextDelta != "" {
 			m.store.Broadcast(m.event(l, agentActor, "agent.delta", map[string]any{"text": su.TextDelta}))
@@ -89,13 +81,11 @@ func (m *Manager) agyStep(ctx context.Context, l *live, p antigravityProcess, ev
 		if su.ToolInfo != nil {
 			info = *su.ToolInfo
 		}
-		p.steps.mu.Lock()
-		called := p.steps.tools[id]
-		p.steps.tools[id] = su.State == "ACTIVE"
+		called := steps.tools[id]
+		steps.tools[id] = su.State == "ACTIVE"
 		if su.State != "ACTIVE" {
-			delete(p.steps.tools, id)
+			delete(steps.tools, id)
 		}
-		p.steps.mu.Unlock()
 
 		if !called {
 			name, input, err := agyToolCall(su.ToolName, info.Parameters)
diff --git a/internal/agents/process.go b/internal/agents/process.go
index e53c608..56bda3b 100644
--- a/internal/agents/process.go
+++ b/internal/agents/process.go
@@ -260,8 +260,7 @@ func (p codexProcess) drive(m *Manager, l *live) {
 }
 
 type antigravityProcess struct {
-	s     *antigravity.Session
-	steps *agySteps
+	s *antigravity.Session
 }
 
 func (m *Manager) startAntigravity(ctx context.Context, sess api.AgentSession, l *live, g string, servers []*mcp.Server, stdio []mcp.Stdio, env []string) (agentProcess, error) {
@@ -293,7 +292,7 @@ func (m *Manager) startAntigravity(ctx context.Context, sess api.AgentSession, l
 			return nil, err
 		}
 	}
-	return antigravityProcess{s: s, steps: newAgySteps()}, nil
+	return antigravityProcess{s: s}, nil
 }
 
 func (p antigravityProcess) send(ctx context.Context, text string, images []image) error {
@@ -324,12 +323,13 @@ func (p antigravityProcess) discard() {
 
 func (p antigravityProcess) drive(m *Manager, l *live) {
 	ctx := context.Background()
+	steps := &agySteps{text: map[int]*strings.Builder{}, tools: map[string]bool{}}
 	for ev := range p.s.Events() {
 		start := time.Now()
 		if wait := start.Sub(ev.Read); wait > 200*time.Millisecond {
 			slog.Info("agent event waited", "session", l.id, "event", ev.Kind, "wait", wait)
 		}
-		err := m.handleAntigravity(ctx, l, p, ev)
+		err := m.handleAntigravity(ctx, l, p, steps, ev)
 		if err != nil {
 			slog.Error("record agent event", "session", l.id, "event", ev.Kind, "err", err)
 		}