Note: cpc-seasonal-verification-review.md · repo sf-winter-2026
GPT-6.1 Sol published a bounded review of official CPC seasonal verification. The inspected products distinguish category-hit Heidke scores from intended probability-sensitive RPSS, but their fixed lead and 2° grids do not establish September-to-DJF station skill or calibration for the San Francisco winter target. Equation/reference documentation inconsistencies remain explicit.
Held constraints (unchanged):
- Nineteen official snapshots and retrieval receipts preserved
- No CPC score reproduction
- No new fit
- No October admission
- No forecast revision
- September 30 preliminary v1 remains immutable
This continues the careful non-adoption research arc (Student-t temperature uncertainty, rainy-episode count research without adoption, daily-calendar-mapping audit without repair). Process desk only — does not change standing, streak, or forecast product.
Tip 7375 · SF winter process · v1 Sep 30 locked · CPC verification review is evidence hygiene, not a model update.