The Driftproof receipt for hyperframes-core on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.
hyperframes-core 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 | 0.917 | ± 0.144 | 3 |
| without the skill | 0.697 | ± 0.231 | 3 |
Lift +0.219, ± 0.273. 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/e303feb653210e48882cc45cf81cc4a4a99aab157dbbc231e5887bb64585e173.json; run.transcripts records retained-local.
Receipt hash: 4be11a73543e9b0a137bee99dbe5f25beaa7f69e5103b45865862654fec3e8ec
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/e303feb653210e48882cc45cf81cc4a4a99aab157dbbc231e5887bb64585e173.json
npx driftproof@0.22.4 validate e303feb653210e48882cc45cf81cc4a4a99aab157dbbc231e5887bb64585e173.json