The Driftproof receipt for hyperframes-animation on Claude Sonnet 5.5, dated 2026-11-01, 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.
Skill token cost: +2900 input and -110 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.872 | ± 0.151 | 3 |
| without the skill | 0.556 | ± 0.287 | 3 |
Lift +0.316, ± 0.324. 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-1/2678081717e971ae9102908ef780fcb282210918d793658026c720f0fafdc860.json; run.transcripts records retained-local.
Receipt hash: 932a427a39bc105f634287f8af286d9ff5c6f58665aa3d719321ca00efaa8a4b
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-1/2678081717e971ae9102908ef780fcb282210918d793658026c720f0fafdc860.json
npx driftproof@0.27.0 validate 2678081717e971ae9102908ef780fcb282210918d793658026c720f0fafdc860.json