A failed auto-commit still advances the workflow from the old HEAD

internal/agents/manager.go

@@ -871,13 +871,15 @@ func (m *Manager) turnEnded(ctx context.Context, l *live, res endResult) error {
 	m.mu.Unlock()
 
 	finished := !res.isError && !interrupted && strings.TrimSpace(res.result) != ""
-	handoff := compacting && finished
 
 	payload := res.payload
 	sha, err := git.CommitAll(l.dir, commitMessage(res), l.gitName, l.gitEmail)
 	if err != nil {
 		slog.Error("commit turn", "session", l.id, "err", err)
+		m.fileError(l, fmt.Sprintf("byre couldn't commit the turn's work, so the turn counts as unfinished: %v", err))
+		finished = false
 	}
+	handoff := compacting && finished
 	if sha != "" {
 		payload["commit"] = sha
 	}