The Driftproof receipt for commit-work on Claude Sonnet 5, from Report 001, dated 2026-07-30, and what it can say.
commit-work 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 | 0.849 | ± 0.028 | 7 |
| without the skill | 0.766 | ± 0.222 | 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/commit-work__claude-sonnet-5.json; run.transcripts records retained-local.
Receipt hash: adee4de4d618212b713ccc4da78de677e53667e5f46f562ae65dfe6af8c4a3a0
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/commit-work__claude-sonnet-5.json
npx driftproof@0.28.0 validate commit-work__claude-sonnet-5.json