supplement README: note the missing code/exp/pipeline fix and what the shipped results/pool/step1..3 are

supplement_20260910/README_supplement.md

@@ -25,6 +25,15 @@ STEP=3 bash code/run_remote.sh
 Return only the new rows: `tar -czf pool_returns_<host>_<date>_sup.tar.gz results/pool/step2 results/pool/step3 logs` and upload
 under returns/ as before (the runner appends to the existing step files; sending the whole step2/step3 directories is fine).
 
+**Fix 2026-09-11:** the first upload of `supplement_20260910/code/` (and of the main package's `code/`) lacked
+`code/exp/pipeline/` (chance.py, scoring.py, stage_d_blind.py). `pool_steps.eligible` imports
+`chance._yes_no_options` (the yes/no-option rule of 2026-09-10) from that folder, so `--plan-only` and the run stop with
+`ModuleNotFoundError: No module named 'chance'`. Both repos now carry the folder; re-download
+`supplement_20260910/code/` and copy it over `pool/code/` (the three files are verbatim copies of our pipeline, the
+screening rule is unchanged). Nothing else in the package changed. Note on the shipped results: `results/pool/step1..3`
+as delivered are our merged rows from the first runs; the supplement run adds new step-2 / step-3 rows for the leftover
+items only (the `--plan-only` count before the run is the expected amount of new work), it does not rerun the rest.
+
 ## New steps 4-6 (code/ in this supplement replaces code/ of the package)
 
 The pool owner added three removal steps so that the screen covers every level of the paper's pyramid: