1[2 {"id": "C1", "text": "Four of five studies can be harmonised onto theta = ln(T_AI/T_noAI); S5 (DiD on GitHub output counts) cannot.", "results_keys": ["k_harmonised", "items"], "status": "supported", "caveat": "Harmonisation of S1/S2 coefficients to a ratio of means relies on the papers' log-linear assumptions."},3 {"id": "C2", "text": "Only S1 and S4 are poolable; S2 (CI only in an unreproduced figure) and S3 (stars only) have no obtainable SE.", "results_keys": ["k_pooled", "pooled_studies", "items"], "status": "supported", "caveat": "S4 SE is approximate, recovered from a p-value."},4 {"id": "C3", "text": "The pooled FE and RE estimate is theta = -0.188 (about -17% task time), 95% CI [-0.396, 0.020].", "results_keys": ["fe_estimate", "re_estimate", "re_ci_low", "re_ci_high", "pooled_pct_change_re", "pooled_pct_change_re_ci"], "status": "supported", "caveat": "k = 2; RE equals FE because tau2 = 0."},5 {"id": "C4", "text": "The pooled effect is not statistically significant at the 5% level; the data cannot establish that generative AI shortens task time.", "results_keys": ["pooled_significant_5pct", "re_ci_low", "re_ci_high"], "status": "supported", "caveat": "Conclusion is conditional on the two poolable studies; excluded studies point in opposite directions."},6 {"id": "C5", "text": "Estimated heterogeneity among poolable studies is low (Q = 0.324, I2 = 0%, tau2 = 0), but with k = 2 this is uninformative, and the non-pooled harmonised estimates (S2 +0.174, S3 -0.354) indicate heterogeneity in direction across settings.", "results_keys": ["q_stat", "i2", "tau2", "heterogeneity_interpretation", "items"], "status": "supported", "caveat": "Cross-study heterogeneity including S2/S3 is not formally testable without their SEs."},7 {"id": "C6", "text": "Using the S1 SE derived from its printed CI instead of the printed SE leaves the conclusion unchanged (RE -0.189 [-0.395, 0.017]).", "results_keys": ["sensitivity_s1_se_from_ci"], "status": "supported", "caveat": "Only this one sensitivity analysis was run."},8 {"id": "C7", "text": "The inputs contain several internal inconsistencies (S1 sample size and log means, S3 rounding, S4 units, S5 star note), none of which materially changes a harmonised value.", "results_keys": ["data_issues"], "status": "supported", "caveat": "Inconsistencies cannot be resolved from the extracts."}9]10