quantmodel — Validate comparison scaffold against the t225 contract

Objective

Validate comparison scaffold against the t225 contract.

Notes: Validated t227 in headless Chromium: canonical URL recovery, duplicate/unknown warnings, 211-month two-row render, and stale-output suppression all pass; focused pytest passes.

Approach

Reuses existing report research/findings/comparison-validation-t229.md — tables/metrics preserved verbatim via source_report pointer. Body below summarizes grounded evidence from that report and adjacent artifacts.

Files / code / data changed

No commit SHA confidently associated with t229 in sampled log [reconstructed — uncertain].
Source report: research/findings/comparison-validation-t229.md
Task-history entry: research/findings/task-history.json#t229

Results

Conclusions and metrics are in research/findings/comparison-validation-t229.md; see detail page for preserved tables/metrics.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.