The Driftproof receipt for git-workflow-and-versioning on claude-opus-5-5, run on 2026-09-29, and what it can say.
git-workflow-and-versioning on claude-opus-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 | 0.861 | no spread recorded | 1 |
| without the skill | 0.508 | no spread recorded | 1 |
Lift +0.353, 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/git-workflow-and-versioning-claude-opus-5-5-2026-09-29.json; run.transcripts records retained-local.
Receipt hash: 37d0c311a5dc31b2a20eaa533af94857e436a7fb9723a5b963cc88ada3bdacbe
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/git-workflow-and-versioning-claude-opus-5-5-2026-09-29.json
npx driftproof@0.12.1 validate git-workflow-and-versioning-claude-opus-5-5-2026-09-29.json