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The Driftproof receipt for grilling on Claude Sonnet 5.5, dated 2026-10-18, and what it can say.

grilling on claude-sonnet-5-5

Run on 2026-10-18, runner 0.22.2, surface claude-cli, verification level TESTED.

Passing

A case separated upward under the band rule. That is a separation detected under the rule, not proof that the skill moved the score.

driftproof badge: passing on claude-sonnet-5-5, 2026-10-18

The two arms

armmeanspread across casescases
with the skill0.744± 0.2003
without the skill0.689± 0.0773

Lift +0.056, ± 0.215. 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.

The two arms of this receipt drawn as ranges, with the effect floor marked. 0 0.25 0.5 0.75 1 overlapping without the skill 0.689 with the skill 0.744

What was verified

receipt_hash verified when this page was built from receipts/skill-measurements/published/fa4e845d3a2e7c9130c0be4014e6b9b51a2b5187dd3ee5e1d4c8073fa5258027.json; run.transcripts records retained-local.

Receipt hash: a270d6454735f29e9dae390c064d7e3efd1500cb1e8a3c96dcd3a3900f697e35

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/fa4e845d3a2e7c9130c0be4014e6b9b51a2b5187dd3ee5e1d4c8073fa5258027.json

npx driftproof@0.22.4 validate fa4e845d3a2e7c9130c0be4014e6b9b51a2b5187dd3ee5e1d4c8073fa5258027.json

Embed the badge

[![driftproof](https://driftproofhq.com/r/a270d6454735f29e9dae390c064d7e3efd1500cb1e8a3c96dcd3a3900f697e35/badge.svg)](https://driftproofhq.com/r/a270d6454735f29e9dae390c064d7e3efd1500cb1e8a3c96dcd3a3900f697e35/)