The Driftproof receipt for frontend-design on Claude Sonnet 5.5, dated 2026-10-18, 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 identity: the two arms' spreads sum to 0.079, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.922 | ± 0.079 | 3 |
| without the skill | 0.925 | ± 0.058 | 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.
What was verified
receipt_hash verified when this page was built from receipts/skill-measurements/published/0258b18dd7c93d9f92e6299adeb40692b861fb17ffbdd733f8ca5bd81099e4bd.json; run.transcripts records retained-local.
Receipt hash: 05a14c53c635688d45acf8c62836a7d47ded2c60e9b78c4a7edef3a5e5329854
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/0258b18dd7c93d9f92e6299adeb40692b861fb17ffbdd733f8ca5bd81099e4bd.json
npx driftproof@0.22.4 validate 0258b18dd7c93d9f92e6299adeb40692b861fb17ffbdd733f8ca5bd81099e4bd.json