Mine a single piece of content (URL, YouTube video, article, raw text, or file) for anything genuinely useful to LifeOS, judged against the whole system — TELOS, the Algorithm, skills, hooks, memory, Pulse, routing, doctrine. Fetches it, extracts candidate ideas/techniques/patterns/tools/framings, tags each with a Prior Status (NEW/PARTIAL/DONE/REJECTED), ranks by usefulness × novelty × effort, and reports where each maps and how we would use it. Report-only; adopting anything is a separate approved step. USE WHEN harvest, harvest this, harvest <URL>, harvest <YouTube>, harvest this video, harvest this article, /harvest, /ha, mine this for the system, anything useful in this for us, what can LifeOS take from this, analyze this for LifeOS-usefulness, should we adopt anything from this. NOT FOR ingesting content into the Knowledge Archive (use _HARVEST), broad multi-source upgrade or bookmark scans (use Upgrade / pu), or general research synthesis (use Research).