The Driftproof receipt for reddit-automation on Claude Sonnet 5.5, dated 2026-11-01, and what it can say.
reddit-automation on claude-sonnet-5-5
Regressed
A case separated downward under the band rule. That is a separation detected under the rule, not proof that the skill moved the score.
Skill token cost: +2774 input and +211 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.740 | ± 0.046 | 3 |
| without the skill | 0.810 | ± 0.042 | 3 |
Lift -0.069, ± 0.062. 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 017 shows that reading.
What was verified
receipt_hash verified when this page was built from receipts/report-017c/campaign-1/0960909c6068a7174c8e22ce9840e5d92ad1c3d7251cc71261d9dea7d26488a6.json; run.transcripts records retained-local.
Receipt hash: 634c8503a6289ce2d01baf865a4baaca5d3fe1a3d78dc16f971b86db1fa56d87
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-017c/campaign-1/0960909c6068a7174c8e22ce9840e5d92ad1c3d7251cc71261d9dea7d26488a6.json
npx driftproof@0.27.0 validate 0960909c6068a7174c8e22ce9840e5d92ad1c3d7251cc71261d9dea7d26488a6.json