Survey a repo and ground externally on the relevant parts of the internet. Local manifest scan + CLAUDE.md/AGENTS.md + recent git activity, then external grounding via WebSearch, WebFetch, and gh — synthesized into a terse, dated, sourced briefing cached at docs/ground/<fingerprint>.md with a 7-day freshness window. Composable: invoked standalone or embedded as a pre-flight phase in other skills. Triggers: ground, ground yourself, ground myself, survey and ground, pre-flight grounding, research the stack, what's new in.
