tom-m-white/grit3 — reverse-engineered prompt

Build me a polished browser based toolkit for working with ARC style grid reasoning tasks. I want a nice landing page with a leaderboard and clear links into the main tools, then separate pages where I can create train and test grids, paste a task and a prediction to see exact match and visual diff results, manually weight questions q3 through q27 with the rubric, and compare model runs from CSV files with weighted scores, coverage, heatmaps, timing, cost, and tokens.

Please also include a human benchmark flow with Supabase backed accounts, a profile page for progress and saved creator questions, a 1v1 challenge page where two users can exchange created tasks and race to solve them, and an admin review page for submitted questions. Use the existing question JSON and result CSV data, keep browser saved drafts and weighting profiles in local storage, and make sure hidden benchmark files stay read only.

It should run locally, build cleanly, and be ready to deploy as a static site on GitHub Pages under /grit3/. If you need anything, check the current docs online.