Drop per-task port blocks; previews use any free loopback port

internal/agents/manager.go

@@ -88,6 +88,7 @@ type Manager struct {
 
 	auditMu sync.Mutex
 
+	exposeMu         sync.Mutex
 	previewMu        sync.Mutex
 	previewListeners map[int]*previewListener
 
@@ -880,7 +881,6 @@ func (m *Manager) startLive(ctx context.Context, sess api.AgentSession, task api
 		g += stageGuidance(frozen, l.stage)
 		tools = append(tools, m.finishStageTool(l))
 	}
-	env := portEnv(task)
 	stdio := []mcp.Stdio{}
 	if sess.Role == api.Implementer {
 		media := MediaDir(task.WorktreePath)
@@ -904,7 +904,6 @@ func (m *Manager) startLive(ctx context.Context, sess api.AgentSession, task api
 		l.dir = m.reviewDir(task.ProjectId, r.Id)
 		g = reviewGuidance
 		tools = []mcp.Tool{m.submitReviewTool(l)}
-		env = nil
 		stdio = []mcp.Stdio{playwrightMCP(m.reviewMediaDir(task.ProjectId, r.Id))}
 	}
 	if l.owner != "" {
@@ -920,9 +919,8 @@ func (m *Manager) startLive(ctx context.Context, sess api.AgentSession, task api
 		}
 		l.notes = "\n\n" + notes
 		tools = append(m.leadTools(l), m.readKnowledgeTool(), m.renderDiagramTool())
-		env = nil
 	}
-	env = append(git.IdentityEnv(l.gitName, l.gitEmail), env...)
+	env := git.IdentityEnv(l.gitName, l.gitEmail)
 	servers := []*mcp.Server{{Name: "byre", Version: "0.0.0", Tools: tools}}
 
 	sctx, cancel := context.WithTimeout(ctx, 60*time.Second)