The Driftproof receipt for requesting-code-review on Claude Opus 5, from Report 003, dated 2026-08-11, and what it can say.
requesting-code-review on claude-opus-5
Not measured
This receipt carries no verdict: it does not record that a model answered the run.
Skill token cost: about +738 input tokens per call, estimated from the SKILL.md length (not measured).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.871 | ± 0.025 | 7 |
| without the skill | 0.671 | ± 0.158 | 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/requesting-code-review__claude-opus-5.json; run.transcripts records retained-local.
Receipt hash: 2ba8c5df004ed0b4b8bfb93cc4314e13ca3ade849fe08f2f9628d8b425bb0559
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-003/requesting-code-review__claude-opus-5.json
npx driftproof@0.28.0 validate requesting-code-review__claude-opus-5.json