The Driftproof receipt for commit-work on claude-opus-5, run on 2026-08-11, and what it can say.
commit-work on claude-opus-5
Not measured
This receipt carries no verdict: it does not record that a model answered the run.
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.882 | ± 0.014 | 7 |
| without the skill | 0.886 | ± 0.020 | 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-003/commit-work__claude-opus-5.json; run.transcripts records retained-local.
Receipt hash: 97c8e19bf030097b1df2777a8b53a66525a39426bf1c5b8ff3ab7541c7e72c5c
Verify this receipt yourself
curl -fsSLO https://raw.githubusercontent.com/driftproofhq/driftproof/main/receipts/report-003/commit-work__claude-opus-5.json
npx driftproof validate commit-work__claude-opus-5.json