The Driftproof receipt for tdd on Claude Sonnet 5.5, dated 2026-11-01, 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 agreement: the two arms' spreads sum to 0.058, at or above the 0.05 floor).
Skill token cost: +1159 input and +39 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.989 | ± 0.019 | 3 |
| without the skill | 0.972 | ± 0.010 | 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.
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-1/5b5214d520f0c5ba96d4f97e379bf12e096d7ffabf2c0bdd8db1983edfebade8.json; run.transcripts records retained-local.
Receipt hash: 8a54b710d73e61ff14ffb7a027676a17b57a5d8077fa08b578b37e307e16a816
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-1/5b5214d520f0c5ba96d4f97e379bf12e096d7ffabf2c0bdd8db1983edfebade8.json
npx driftproof@0.27.0 validate 5b5214d520f0c5ba96d4f97e379bf12e096d7ffabf2c0bdd8db1983edfebade8.json