stuck task issue

internal/codex/session.go

@@ -16,6 +16,7 @@ import (
 	"strconv"
 	"sync"
 	"sync/atomic"
+	"syscall"
 	"time"
 
 	"g.fc.run/ai/byre/internal/mcp"
@@ -159,6 +160,7 @@ func spawn(opts Options) (*Session, error) {
 	cmd.Dir = opts.Cwd
 	cmd.Stderr = os.Stderr
 	cmd.Env = buildEnv(opts)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
 	stdinR, stdin, err := os.Pipe()
 	if err != nil {
@@ -536,7 +538,7 @@ func (s *Session) Close() error {
 	select {
 	case <-s.done:
 	case <-time.After(5 * time.Second):
-		s.cmd.Process.Kill()
+		syscall.Kill(-s.cmd.Process.Pid, syscall.SIGKILL)
 		<-s.done
 	}
 
@@ -544,7 +546,7 @@ func (s *Session) Close() error {
 }
 
 func (s *Session) Kill() {
-	s.cmd.Process.Kill()
+	syscall.Kill(-s.cmd.Process.Pid, syscall.SIGKILL)
 	<-s.done
 	s.cmd.Wait()
 }
@@ -577,7 +579,7 @@ func (s *Session) write(m message, deadline time.Time) error {
 	n, err := s.stdin.Write(append(b, '\n'))
 	if n > 0 && errors.Is(err, os.ErrDeadlineExceeded) {
 		slog.Error("codex stopped reading its stdin mid-line; killing it", "pid", s.cmd.Process.Pid, "written", n, "len", len(b)+1)
-		s.cmd.Process.Kill()
+		syscall.Kill(-s.cmd.Process.Pid, syscall.SIGKILL)
 	}
 	return err
 }