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

hyperframes-core 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 skill0.951± 0.0643
without the skill0.711± 0.2843

Lift +0.240, ± 0.291. 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 0.711 with the skill 0.951

What was verified

receipt_hash verified when this page was built from receipts/skill-measurements/published/60c16ec8fe136dda9fd4ede597c011588348d58e699d3fd6aa3125abee2f16e2.json; run.transcripts records retained-local.

Receipt hash: fc75ea505919e81c9ebf39fc75540760e4016909add2d48ae5bcbcf289ba31bf

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/60c16ec8fe136dda9fd4ede597c011588348d58e699d3fd6aa3125abee2f16e2.json

npx driftproof@0.22.4 validate 60c16ec8fe136dda9fd4ede597c011588348d58e699d3fd6aa3125abee2f16e2.json

Embed the badge

[![driftproof](https://driftproofhq.com/r/fc75ea505919e81c9ebf39fc75540760e4016909add2d48ae5bcbcf289ba31bf/badge.svg)](https://driftproofhq.com/r/fc75ea505919e81c9ebf39fc75540760e4016909add2d48ae5bcbcf289ba31bf/)