quantmodel — Browser-validate observed-AS comparison source

Objective

Browser-validate observed-AS comparison source.

Notes: Chromium validated default/AS URLs, source switching and history, observed metrics, malformed recovery, 390px rendering, and missing-observed cleanup; no product fix needed.

Approach

Reuses existing report research/findings/comparison-observed-validation-t243.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 t243 in sampled log [reconstructed — uncertain].
Source report: research/findings/comparison-observed-validation-t243.md
Task-history entry: research/findings/task-history.json#t243

Results

Conclusions and metrics are in research/findings/comparison-observed-validation-t243.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.