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The Driftproof receipt for media-use on Claude Opus 5.5, dated 2026-10-18, and what it can say.

media-use on claude-opus-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-opus-5-5, 2026-10-18

The two arms

armmeanspread across casescases
with the skill0.909± 0.1213
without the skill0.759± 0.2873

Lift +0.150, ± 0.312. 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 0.759 with the skill 0.909

What was verified

receipt_hash verified when this page was built from receipts/skill-measurements/published/32a8a546049f6901702ee98048a3feed2a6e3c357efa38788538f443bf04b7f9.json; run.transcripts records retained-local.

Receipt hash: ceb928044061eeaec1f43472344257829307fb4785f57a754ca5a7c1937d35f1

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/32a8a546049f6901702ee98048a3feed2a6e3c357efa38788538f443bf04b7f9.json

npx driftproof@0.22.4 validate 32a8a546049f6901702ee98048a3feed2a6e3c357efa38788538f443bf04b7f9.json

Embed the badge

[![driftproof](https://driftproofhq.com/r/ceb928044061eeaec1f43472344257829307fb4785f57a754ca5a7c1937d35f1/badge.svg)](https://driftproofhq.com/r/ceb928044061eeaec1f43472344257829307fb4785f57a754ca5a7c1937d35f1/)