The Driftproof receipt for grill-with-docs on Claude Opus 5.5, dated 2026-10-18, and what it can say.
grill-with-docs on claude-opus-5-5
Not enough draws
Not enough draws to conclude at this effect floor.
Draws needed: no draw count at these spreads (case decision: the two arms' spreads sum to 0.166, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.953 | ± 0.081 | 3 |
| without the skill | 0.968 | ± 0.035 | 3 |
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/skill-measurements/published/769d04060c00a8bd6e04a978d0c7700c5d41e78c1764fc0eb1b76d2cff114481.json; run.transcripts records retained-local.
Receipt hash: c16d64823a745011f11b6bff2417d4ade5eb92345a7b1ae121579ceea5b18b06
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/skill-measurements/published/769d04060c00a8bd6e04a978d0c7700c5d41e78c1764fc0eb1b76d2cff114481.json
npx driftproof@0.22.4 validate 769d04060c00a8bd6e04a978d0c7700c5d41e78c1764fc0eb1b76d2cff114481.json