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The lab lived at /subscriptions/tariff-lab — the wrong neighborhood for a tool that tests the rate card. /setup/tariff is now a small layout with two sub-tabs (composer at the index, lab at /setup/tariff/lab) behind the existing tariff:read gate. Old URLs (/subscriptions/tariff-lab and the original /setup/tariff-lab) redirect, and the tariff-read-only redirect branch on /subscriptions is gone with the tab. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V