The Driftproof receipt for hyperframes-animation on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.
hyperframes-animation on claude-sonnet-5-5
Passing
A case separated upward under the band rule. That is a separation detected under the rule, not proof that the skill moved the score.
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.880 | ± 0.208 | 3 |
| without the skill | 0.506 | ± 0.280 | 3 |
Lift +0.374, ± 0.349. A spread is the sample standard deviation of the per-case means: a descriptive spread with no coverage probability. The verdict above reads each case's two bands, not these aggregates.
What was verified
receipt_hash verified when this page was built from receipts/skill-measurements/published/d3d22183f51e5d3463cf278678a3579ca8fe8e0573484c03c103289361eaac79.json; run.transcripts records retained-local.
Receipt hash: b9f499c15c4f83c9a4e1171e88681271c6d6d2cc8637bac97659c5c05a6ab0ce
Check this file yourself
validate shows that this file is unchanged since it was sealed. It does not show who made it or who sealed it.
curl -fsSLO https://raw.githubusercontent.com/driftproofhq/driftproof/main/receipts/skill-measurements/published/d3d22183f51e5d3463cf278678a3579ca8fe8e0573484c03c103289361eaac79.json
npx driftproof@0.22.4 validate d3d22183f51e5d3463cf278678a3579ca8fe8e0573484c03c103289361eaac79.json