The Driftproof receipt for code-review-and-quality on claude-sonnet-5, run on 2026-09-29, and what it can say.
code-review-and-quality on claude-sonnet-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 | 0.880 | no spread recorded | 1 |
| without the skill | 0.578 | no spread recorded | 1 |
Lift +0.302, no ± (1 case). 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/report-013/run-1/code-review-and-quality-claude-sonnet-5-2026-09-29.json; run.transcripts records retained-local.
Receipt hash: fbf686932b16a0b5ca909ddb8453c0da1c43850a772958e62aacea6d0fdc318c
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-013/run-1/code-review-and-quality-claude-sonnet-5-2026-09-29.json
npx driftproof@0.12.1 validate code-review-and-quality-claude-sonnet-5-2026-09-29.json