The Driftproof receipt for grill-me on Claude Haiku 5.5, dated 2026-11-08, and what it can say.
grill-me on claude-haiku-5-5
Passing
A case separated upward under the band rule. That is a separation detected under the rule, not proof that the skill moved the score.
Skill token cost: +66 input and +57 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.775 | ± 0.123 | 3 |
| without the skill | 0.701 | ± 0.119 | 3 |
Lift +0.074, ± 0.171. 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/canary/2026-11-08/grill-me-claude-haiku-5-5-2026-11-08-77d54fcf4a7f.json; run.transcripts records hashes-only.
Receipt hash: 77d54fcf4a7f6d39a06b842b5f5da4f459eba6d7b0bde420c1ab1aac7753135c
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/canary/2026-11-08/grill-me-claude-haiku-5-5-2026-11-08-77d54fcf4a7f.json
npx driftproof@0.28.0 validate grill-me-claude-haiku-5-5-2026-11-08-77d54fcf4a7f.json