Adds validate-sources.mjs that reads the live channel and flags every Wikipedia link (52 of 68) plus fetches are.na search results to surface what other users are connecting for the same topic. The search endpoint is Cloudflare-gated for unauthed requests, so the 'nearby' column is empty until ARENA_TOKEN is exported. Drafts source-swaps.md — a full replacement table with primary URLs (UbuWeb, Monoskop, Fasola, Mela Foundation, Earle Brown Foundation, Noa Eshkol Foundation, Dance Notation Bureau, Terry Riley site, NYT Jalaiah profile, etc.). Also flags three wiki links that redirect to unrelated pages (Water Yam → yam tuber, Gahu → Iranian village, Renegade → K Camp song). Proposes blocks to ADD from the whistlegraph paper citations: Goodiepal El Camino del Hardcore, Dirt Magazine profile, Rhizome Longest Whistlegraph, Paper Rad, Schloss-Post RDP manifesto, Sex Magazine, CI essay. No channel writes yet — review swaps.md first. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>