The Driftproof receipt for hyperframes-cli on Claude Opus 5.5, dated 2026-10-18, and what it can say.
hyperframes-cli on claude-opus-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 | 0.955 | ± 0.042 | 3 |
| without the skill | 0.644 | ± 0.051 | 3 |
Lift +0.310, ± 0.067. 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/e6b9880e7eb4ce1f137a5a328b94b5ef93122183a344201bdc1c309eea082c3e.json; run.transcripts records retained-local.
Receipt hash: 3939420c0ea1f9e5b2bffbff5b7600ac53126a761fa20ca460d68f961727d13d
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/e6b9880e7eb4ce1f137a5a328b94b5ef93122183a344201bdc1c309eea082c3e.json
npx driftproof@0.22.4 validate e6b9880e7eb4ce1f137a5a328b94b5ef93122183a344201bdc1c309eea082c3e.json