The Driftproof receipt for tdd on Claude Haiku 5.5, dated 2026-11-08, and what it can say.
tdd on claude-haiku-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 0.225, at or above the 0.05 floor).
Skill token cost: +1158 input and +61 output tokens per call against no skill (measured, grading excluded).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.932 | ± 0.104 | 3 |
| without the skill | 0.917 | ± 0.144 | 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/canary/2026-11-08/tdd-claude-haiku-5-5-2026-11-08-af48d1c09e9d.json; run.transcripts records hashes-only.
Receipt hash: af48d1c09e9debed1aad76483897bbcfb16f488118d2b5c2ab74cd5142f4ba07
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/canary/2026-11-08/tdd-claude-haiku-5-5-2026-11-08-af48d1c09e9d.json
npx driftproof@0.28.0 validate tdd-claude-haiku-5-5-2026-11-08-af48d1c09e9d.json