The Driftproof receipt for improve-codebase-architecture on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.
improve-codebase-architecture on claude-sonnet-5-5
Not enough draws
Not enough draws to conclude at this effect floor.
Draws needed: no draw count at these spreads (case candidate: the two arms' spreads sum to 0.198, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.857 | ± 0.090 | 3 |
| without the skill | 0.754 | ± 0.112 | 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.
What was verified
receipt_hash verified when this page was built from receipts/skill-measurements/published/c3746f2248c244317f756f5b358a91736c10798fd837f91ba30cb9d76c55aa5a.json; run.transcripts records retained-local.
Receipt hash: 63f198b3d801d7a5d008195273b96aad18638c7a45b9e4de71a995525357f82e
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/c3746f2248c244317f756f5b358a91736c10798fd837f91ba30cb9d76c55aa5a.json
npx driftproof@0.22.4 validate c3746f2248c244317f756f5b358a91736c10798fd837f91ba30cb9d76c55aa5a.json