fix(issue-36): a job that cannot be registered after a rebuttal ends the loop with rc 1

Review of f5cadd9 (planner-reviewer-codex-01, R1): the compliance job's
registration failure was only logged, so a passing next round ended the
real loop process with rc 0. Compliance now returns 1 when it cannot be
registered or does not finish, as the correction step already does.
Re-adjudication and arbitration also return 1 when their job cannot be
registered; a registered job that yields no verdict keeps the designed
fail-closed fallback.

S4c (stubbed delegate_job, a fixture whose later rounds never pass) is
replaced by S3c: a real `python -m lib_py.loop` process whose wrapper runs
an executable that simulates the agents, refusing the compliance,
re-adjudication or arbitration registration while the next round passes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.agents/skills/lib_py/loop/runner.py

@@ -1350,7 +1350,11 @@ class LoopRunner:
                         adj_prompt = f"작업자(Creator)가 귀하의 리뷰 지적 중 일부를 타당하지 않다고 판단하여 반론을 제기했습니다. 반론을 검토하고 재심(re-adjudication)하십시오. 반론이 타당하여 귀하의 지적을 철회한다면 리포트 마지막에 단독 행으로 '[ADJUDICATION: SUSTAINED]' 를, 반론이 타당하지 않아 지적을 유지한다면 '[ADJUDICATION: OVERRULED]' 를 명시하십시오. 반론 내용:\n{rebuttal_text}"
                         adj_jid = self._dispatch(rt, rt_type, "Reviewer", adj_prompt,
                                                  remote=rt in self._remote_recipients, purpose="adjudication")
-                        if not adj_jid or not self.wait_for_job(adj_jid):
+                        if not adj_jid:
+                            # a job that was never registered is a failure, not a verdict (Issue #36)
+                            log_error(f"Failed to register re-adjudication job for '{rt}'.")
+                            return 1
+                        if not self.wait_for_job(adj_jid):
                             log_warn(f"Re-adjudication job for '{rt}' failed; objection stands.")
                             overruled_revs.append(rt)
                             continue
@@ -1369,7 +1373,10 @@ class LoopRunner:
                             p_type = self.resolve_agent_type(planner_session, state)
                             arb_prompt = f"작업자(Creator)와 리뷰어의 의견이 충돌하여 교착 상태입니다. 계획서 관점에서 어느 쪽이 타당한지 재정(arbitration)하십시오. 리포트 마지막에 단독 행으로 '[ARBITRATION: CREATOR]' 또는 '[ARBITRATION: REVIEWER]' 를 명시하십시오. 리뷰어 지적:\n{feedback_aggregate}\n작업자 반론:\n{rebuttal_text}\n기존 계획서:\n{self.current_plan}"
                             arb_jid = self._dispatch(planner_session, p_type, "Planner", arb_prompt)
-                            if arb_jid and self.wait_for_job(arb_jid):
+                            if not arb_jid:
+                                log_error("Failed to register Planner arbitration job.")
+                                return 1
+                            if self.wait_for_job(arb_jid):
                                 arb_file = self.find_report(arb_jid)
                                 if arb_file and parser.has_tag_line(arb_file, "ARBITRATION: CREATOR"):
                                     arbitration = "CREATOR"
@@ -1383,10 +1390,9 @@ class LoopRunner:
                             rebut_budget = 0
                             comply_prompt = f"귀하의 반론은 재심 결과 기각되었습니다. 더 이상 반론하지 말고 다음 리뷰 피드백을 그대로 반영하여 코드를 수정하십시오. 피드백:\n{feedback_aggregate}"
                             comp_jid = self._dispatch(self.creator, creator_type, "Worker", comply_prompt)
-                            if comp_jid:
-                                self.wait_for_job(comp_jid)
-                            else:
+                            if not comp_jid or not self.wait_for_job(comp_jid):
                                 log_error("Failed to register Creator compliance job.")
+                                return 1
 
         # Promotion
         if self.plan_mode and self.current_plan and self.plan_job_id: