The Driftproof receipt for grill-with-docs on Claude Haiku 5.5, from Report 018, dated 2026-11-02, and what it can say.
grill-with-docs on claude-haiku-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 0.236, at or above the 0.05 floor).
Skill token cost: +102 input and +314 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.870 | ± 0.036 | 3 |
| without the skill | 0.865 | ± 0.075 | 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.
This receipt also reads the skill against a same-length placebo. Report 018 shows that reading.
What was verified
receipt_hash verified when this page was built from receipts/report-018/campaign-3/6824deb80c68dc4468abbb5632513899800efd9b1e354b98e3c6a1237390fc96.json; run.transcripts records retained-local.
Receipt hash: d10a6870927d28f0655df316c2cb95752667fdc6df93560c7ff4447538095ef6
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-018/campaign-3/6824deb80c68dc4468abbb5632513899800efd9b1e354b98e3c6a1237390fc96.json
npx driftproof@0.27.0 validate 6824deb80c68dc4468abbb5632513899800efd9b1e354b98e3c6a1237390fc96.json