Walks high-degree hub nodes, reads neighborhood, distills essential
insights upward into the hub. REFINE to update stale hubs, SPLIT
to flag hubs that cover too many sub-topics. Size discipline:
200-500 words per hub, flag over 800 for splitting.
Completes the agent ecology: extract (experience) → link (linker) →
organize (clusters) → distill (hubs) → rename (vocabulary) → split
(overgrown hubs). Each stage refines the previous.
Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>
