The Driftproof receipt for reddit-automation on Claude Sonnet 5.5, dated 2026-10-18, 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.
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.769 | ± 0.056 | 3 |
| without the skill | 0.890 | ± 0.024 | 3 |
Lift -0.121, ± 0.061. 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/9685c971122d1546df04509e1ae9ffae7d5b05d4b77b912114c12f8a8f9266c2.json; run.transcripts records retained-local.
Receipt hash: bdbb7f978fdd9d4da60bf9d8dba76159cdc7f37b946f3735ff31acecc5ba4b3a
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/9685c971122d1546df04509e1ae9ffae7d5b05d4b77b912114c12f8a8f9266c2.json
npx driftproof@0.22.4 validate 9685c971122d1546df04509e1ae9ffae7d5b05d4b77b912114c12f8a8f9266c2.json