The Driftproof receipt for hyperframes-core on Claude Sonnet 5.5, dated 2026-11-01, 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.
Skill token cost: +4407 input and -24 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.914 | ± 0.092 | 3 |
| without the skill | 0.651 | ± 0.289 | 3 |
Lift +0.264, ± 0.304. 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.
This receipt also reads the skill against a same-length placebo. Report 017 shows that reading.
What was verified
receipt_hash verified when this page was built from receipts/report-017c/campaign-1/fd401f5c7ca07816d619eb38523b7b618c904ad05587f5b1a675e2a32baee2c1.json; run.transcripts records retained-local.
Receipt hash: 7c7564b040f77c1bb69904c78545d55c1d8dc08b8661b3ef5c9522c0de9a6245
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/report-017c/campaign-1/fd401f5c7ca07816d619eb38523b7b618c904ad05587f5b1a675e2a32baee2c1.json
npx driftproof@0.27.0 validate fd401f5c7ca07816d619eb38523b7b618c904ad05587f5b1a675e2a32baee2c1.json