The Driftproof receipt for triage on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.
triage 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.
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 1.000 | ± 0.000 | 3 |
| without the skill | 0.733 | ± 0.252 | 3 |
Lift +0.267, ± 0.252. 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/2df9e97722cb55d279b0b1f42535200a602eba67c7c40a4869cce6d4a1ae6e1e.json; run.transcripts records retained-local.
Receipt hash: d31b2f40eced27b77786d4fa004f3a8cac901918bb82fbf199588a3aa3b5716e
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/2df9e97722cb55d279b0b1f42535200a602eba67c7c40a4869cce6d4a1ae6e1e.json
npx driftproof@0.22.4 validate 2df9e97722cb55d279b0b1f42535200a602eba67c7c40a4869cce6d4a1ae6e1e.json