Verified both round-1 briefs against the code rather than the progress
notes. Billing 0/1/2/3/6 and rectification 0/1/2/3/6 are in and clean, and
neither the confirmation gate nor the sealed holdout was loosened.
Two gaps remain. Prompt caching only emits its marker for Anthropic, so on
a DeepSeek-class provider it buys observability and no cost reduction, and
the membership fair-use numbers are untouched — correctly so, since no
real unit cost has been measured yet. The round-2 brief gates those on a
staging measurement pass and pulls the per-answer narrowing table forward,
since it is the deliverable and depends on nothing.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0155nFCgCHtoA7jhSDGmZmMu
Jesse_Chen