The Driftproof receipt for frontend-design on Claude Sonnet 5.5, dated 2026-11-01, and what it can say.
frontend-design on claude-sonnet-5-5
Not enough draws
Not enough draws to conclude at this effect floor.
Draws needed: no draw count at these spreads (case content: the two arms' spreads sum to 0.177, at or above the 0.05 floor).
Skill token cost: +2840 input and +525 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.934 | ± 0.099 | 3 |
| without the skill | 0.936 | ± 0.055 | 3 |
No lift is stated for a state that did not measure one. 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-1/9edec01658bd1dd3181739e2133b892dd7036c5bb275aba29f8e3a2cfbcf529a.json; run.transcripts records retained-local.
Receipt hash: 0868c96e9921658415dfbc23245185d69a3b867f1af4a146f0adb0d0c75cd007
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-1/9edec01658bd1dd3181739e2133b892dd7036c5bb275aba29f8e3a2cfbcf529a.json
npx driftproof@0.27.0 validate 9edec01658bd1dd3181739e2133b892dd7036c5bb275aba29f8e3a2cfbcf529a.json