The Driftproof receipt for hyperframes-core on Claude Haiku 5.5, from Report 018, dated 2026-11-02, and what it can say.
hyperframes-core 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: +4406 input and +169 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.890 | ± 0.139 | 3 |
| without the skill | 0.579 | ± 0.307 | 3 |
Lift +0.311, ± 0.337. 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-3/7d49184622855ca5fb40c0581fd05c178c88eacd2c4abc9dea8c3d15b6ca7005.json; run.transcripts records retained-local.
Receipt hash: 0d793c26e9706e2a40d37f7c109f2c8250ce87114f9cdf0eb6173c95060c63ef
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-3/7d49184622855ca5fb40c0581fd05c178c88eacd2c4abc9dea8c3d15b6ca7005.json
npx driftproof@0.27.0 validate 7d49184622855ca5fb40c0581fd05c178c88eacd2c4abc9dea8c3d15b6ca7005.json