The Driftproof receipt for writing-clearly-and-concisely on claude-sonnet-5, run on 2026-07-28, and what it can say.
writing-clearly-and-concisely on claude-sonnet-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 | 0.841 | ± 0.064 | 7 |
| without the skill | 0.813 | ± 0.100 | 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/writing-clearly-and-concisely__claude-sonnet-5.json; this receipt does not record run.transcripts.
Receipt hash: 87893ab49a3841a5d27b718aa79ad2db30322dceadfa8079847b7cecc2ab2eea
Verify this receipt yourself
curl -fsSLO https://raw.githubusercontent.com/driftproofhq/driftproof/main/receipts/report-001/writing-clearly-and-concisely__claude-sonnet-5.json
npx driftproof validate writing-clearly-and-concisely__claude-sonnet-5.json