experiment-rigor

Structure an experiment and its write-up so the Methods reconstruct without the conversation and the uncertainty is declared, not hidden — a typed record.yaml across a probe / measurement / decision tier ladder, every load-bearing rule a script that exits non-zero rather than a line of prose. Use when you pre-register an A/B, freeze a plan before running it, write up an experiment or a comparison, add error bars or a confidence interval to a rate, reconcile declared cells against the runs that happened, separate confirmatory from exploratory outcomes, name the threats to validity, design the 2x2, or ask whether a skill, tier, model, or strategy actually helps and how you would show it rigorously. Covers the small-n refusal (no CLT below 30 — Wilson, Clopper-Pearson, or a within-experiment Beta-Binomial), the design-arithmetic reconciliation (declared cells == disposition == denominators), the plan freeze and its drift gate, the rate that needs both a numerator and a denominator, probe self-labeling, and record-is-source with the report derived. Not for running the scenario matrix or scoring a bank — that is fathom's fathom-eval; not for measuring one skill's trigger activation — that is evaluate-skill; not for judging whether a spec is ready to build — that is keel's Definition of Ready; and not for a throwaway spot-check you will decide nothing on.