Integrate P33 cross-size covariance diagnostics - #69
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Bring the P33 covariance audit, root-doubling diagnostic, archive validation, synthetic regressions, and committed historical outputs onto current main. Treat these as research diagnostics; further numerical hardening is optional follow-up for precision-sensitive claims.
This was referenced Aug 28, 2026
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Purpose
Put the already-computed P33 cross-size covariance audit on current
mainwithout carrying forward the old divergent PR stack.Includes
Interpretation
This is research diagnostic infrastructure, not a claim that the generic scorer is a fully calibrated statistical package. For the historical data, the measured correlations are modest and the full-covariance diagnostics are close to the diagonal versions; that is already useful for deciding what to run next.
Further pseudoinverse/finite-sample/general-weight hardening is follow-up only if a precision-sensitive paper claim actually depends on it.
Supersedes the old divergent PR #46 after merge.