The Driftproof receipt for triage on Claude Sonnet 5.5, dated 2026-11-01, 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.
Skill token cost: +2331 input and -18 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.899 | ± 0.031 | 3 |
| without the skill | 0.631 | ± 0.189 | 3 |
Lift +0.268, ± 0.192. 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/fd659efbeefcd5620d0e01d67cb4ff7c16218e6f1ab680952df8180bfb42fd9c.json; run.transcripts records retained-local.
Receipt hash: 89b67ed69a5a7368214cac086f1ef50b57e19c4644af33d71f456663ead117e8
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/fd659efbeefcd5620d0e01d67cb4ff7c16218e6f1ab680952df8180bfb42fd9c.json
npx driftproof@0.27.0 validate fd659efbeefcd5620d0e01d67cb4ff7c16218e6f1ab680952df8180bfb42fd9c.json