diff --git a/models/male-cns-lif/conditioning-acceleration-v1/benchmark.py b/models/male-cns-lif/conditioning-acceleration-v1/benchmark.py
index efa5662..1665b38 100644
--- a/models/male-cns-lif/conditioning-acceleration-v1/benchmark.py
+++ b/models/male-cns-lif/conditioning-acceleration-v1/benchmark.py
@@ -160,6 +160,7 @@ def main(args):
     try:
         queues_before = idle_queues()
         gpu_before = gpu_snapshot(args.uuid)
+        initial_manifest_pins = {str(p): sha(p) for p in args.manifest}
         fixtures, common_identity = load_fixtures(args.manifest)
         backend = CudaEligibility(device_index=0)
         cp = backend.cp
@@ -177,7 +178,7 @@ def main(args):
         assert subprocess.check_output(['git', '-C', str(source), 'status', '--porcelain'], text=True) == '', 'Candidate source worktree dirty'
         save(args.output / 'authority.json', dict(device=device, queues_before=queues_before,
             candidate_commit=commit, common_full_mapping_identity=common_identity,
-            fixture_manifests={str(p): sha(p) for p in args.manifest}, repeats=20, warmups=3,
+            fixture_manifests=initial_manifest_pins, repeats=20, warmups=3,
             all_source_files={p.name: sha(p) for p in sorted(source.iterdir()) if p.is_file()},
             scope='eligibility/delta replay only; no brain, training, or installation',
             original_experiment_resumed=False, created_utc=datetime.now(timezone.utc).isoformat()))
@@ -226,9 +227,12 @@ def main(args):
             print(json.dumps(dict(fixture=f_id, exact=True,
                 median_ms=1000 * report['summaries']['replay_wall_including_preparation_and_comparison_seconds']['median'])), flush=True)
         # Recheck original exported files at the end, not just at read time.
+        assert initial_manifest_pins == {str(p): sha(p) for p in args.manifest}, 'Fixture manifest changed'
         load_fixtures(args.manifest)
         rejections = check_rejections(args.manifest, backend, fixtures[0]['rule'])
         save(args.output / 'invalid-input-rejections.json', rejections)
+        assert commit == subprocess.check_output(['git', '-C', str(source), 'rev-parse', 'HEAD'], text=True).strip()
+        assert subprocess.check_output(['git', '-C', str(source), 'status', '--porcelain'], text=True) == ''
         result = dict(status='PASS-ELIGIBILITY-UPDATE-REPLAY-EQUIVALENCE', fixtures=len(reports),
             device=device, candidate_commit=commit, all_fixture_repeats_bitwise_exact=True,
             observed_cuda_pool_reserved_peak_bytes=peak_reserved, gpu_after=gpu_snapshot(args.uuid),