A red-team run seeded 28 small faults into three scripts under platform/ci/, one at a time, and ran each script's own tests. check_social_proof.py caught 8 of 8 and check_heading_order.py 10 of 10. sync_tree_counts.py, which rewrites hand-written tool counts across the repo, caught 1 of 10.
The escapes sat in the paths that fail quietly: the Node call that counts opt-out switches (a non-zero exit, unparseable output, text capture), rewriting a sentence that names the count twice, and the exit code 2 for a failed or zero derivation. Six new tests close seven of the nine. The other two (the sys.path insert position and an argparse banner) were judged equivalent. No real defects turned up. Run record: prompts/runs/2026-10-26-session_01WmopMvj4DJJUjcjsvHzt3w.json.