radar-lab-sweeplisted

# Lab sweep — every run, no rotation A real research radar checks the labs themselves every single day. This sweep is mandatory on every daily run and is separate from (and in addition to) the rotating exploration slot. Official lab/vendor blogs are primary sources under the Hard rules, so anything found here is citable evidence. ## Method (efficient) 1. For each source in the list, fetch its FEED first (RSS/Atom), not the HTML index — feeds are immune to the JS-rendering that hid `lmsys.org/blog`. To find a feed: try `/rss.xml`, `/feed`, `/atom.xml`, `/index.xml`, or read the page's `<link rel="alternate" type="application/rss+xml">`. 2. Open only entries dated AFTER the last daily scan (check the previous `source_rotation` date). Skip everything older — this keeps the sweep cheap. 3. Apply the evidence rules: open the actual post, cite its own date, match to a trend or log to `observation_queue`/`study_shelf` as appropriate. 4. Log the sweep in `source_rotation` every run, even when nothing is new ("lab-sweep: no new posts"). ## Source list The list lives in `SOURCES.md` → "Lab & big-tech AI blogs" (agent-owned: mark feeds `DEAD` if they stop resolving, add new labs as they appear). Prefer the feed URL; fall back to the HTML index via `tvly extract` only if no feed exists. ## Notes - The sweep complements, never replaces, the rotating exploration slot. - Big-tech AI blogs often announce model/open-weight releases that never become arXiv papers — t