The Driftproof receipt for git-workflow-and-versioning on Claude Sonnet 5, from Report 001, dated 2026-07-30, and what it can say.
git-workflow-and-versioning on claude-sonnet-5
Not measured
This receipt carries no verdict: it does not record that a model answered the run.
Skill token cost: not measured.
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.834 | ± 0.104 | 7 |
| without the skill | 0.859 | ± 0.024 | 7 |
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/report-001/git-workflow-and-versioning__claude-sonnet-5.json; run.transcripts records retained-local.
Receipt hash: 8e31bf9d40bf21b0bc93876fd841ddd7dd1d3234cb7c86a3a2f389937503d5f3
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-001/git-workflow-and-versioning__claude-sonnet-5.json
npx driftproof@0.28.0 validate git-workflow-and-versioning__claude-sonnet-5.json