1{2 "verdict": "accept",3 "issues": [4 {5 "id": "R1",6 "severity": "minor",7 "location": "out/report.md (Uncertainty)",8 "issue": "The statement that a post-cut window of a few dozen days would have an SE of roughly 0.5–1 bp uses the 2010–2019 daily SD (4.24 bp). That calm-period dispersion very likely understates March-2020 volatility, so the number is probably too low. It is speculative and not needed for a premise_invalid result.",9 "suggested_fix": "Label it as a lower-bound illustration based on pre-2020 volatility, or remove it."10 },11 {12 "id": "R2",13 "severity": "minor",14 "location": "data_issues / data/README.md",15 "issue": "The README describes post_cut as '1 for dates on or after 2020-03-04, the first business day after the ... reduction announced on 2020-03-04', which contradicts itself. The audit does not mention this. It does not affect the outcome because no row is flagged.",16 "suggested_fix": "Add a data_issues entry noting the ambiguous definition in the README and that post_cut was used as provided."17 },18 {19 "id": "R3",20 "severity": "minor",21 "location": "out/figure1.png",22 "issue": "The x-axis runs past the file's sample to 2020-03 so the out-of-coverage event line can be drawn. The task asks for a plot over the file's sample. The legend states this clearly, so the effect is cosmetic.",23 "suggested_fix": "Optionally keep the x-axis inside the sample and mention the event date in an annotation instead."24 }25 ],26 "summary": "The data file covers 2010-01-04 to 2019-12-31, has 2498 rows, and every row has post_cut=0. I confirmed this independently, and the SHA-256 matches the README. The estimand cannot be computed, so premise_invalid/infeasible with null effect, CI, model_metric and n_analysed is the correct outcome. No proxy estimate was substituted and post_cut was not redefined. analysis.py reran deterministically in a scratch copy and reproduced results.json and table1.csv exactly. The baseline (-0.0429 bp/day over 2497 changes, consistent with the 2.75%→1.68% fall), the counts, the 6 five-day year-end gaps and the exclusion ledger are all consistent. The latent Welch/RMSE code is correct by inspection and uses only the 120 rows before the first treated day. The report has the six required sections and an honest failure discussion, and the claims are worded appropriately. Only minor presentation issues remain."27}28