The Driftproof receipt for tdd on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.
tdd 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 test: the two arms' spreads sum to 0.050, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.992 | ± 0.014 | 3 |
| without the skill | 0.989 | ± 0.019 | 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/75f362305b21006c9cb104cf94f74b6cb2399c92d27308c631ea15941481778c.json; run.transcripts records retained-local.
Receipt hash: b3cd3ced76180ed975ee3b80073889f2f469a350295428e05f4c73e83127a6b8
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/75f362305b21006c9cb104cf94f74b6cb2399c92d27308c631ea15941481778c.json
npx driftproof@0.22.4 validate 75f362305b21006c9cb104cf94f74b6cb2399c92d27308c631ea15941481778c.json