# concept-family-explorer Gap-discovery layer above /dr — maps a subject's full conceptual family (parent, siblings, children, adjacent fields, frontier), scores what's missing, and researches every worthwhile gap to saturation. Given a subject, `concept-family-explorer` finds the concepts in its conceptual family that are **currently missing** from an existing skill library or concept tree, fills the worthwhile ones to saturation by running `/dr` on each, and finishes by optimizing every skill it touched. It is a **gap-discovery orchestrator**, not a researcher — per-concept research, skill authoring, and installation are `/dr`'s job. This skill decides *which* concepts are worth researching, in what order, and *when to stop*. ## The five neighborhoods Every subject gets decomposed into five neighborhoods before anything is scored: | Neighborhood | Question it answers | | --- | --- | | Parent / super-domain | What broader field is this a specialization of? | | Siblings | What sits at the same level under the same parent? | | Children / sub-concepts | What does this decompose into? | | Adjacent / cross-over | What neighboring domains overlap or interface here? | | Frontier / emerging | What is new, contested, or rising in this space? | Each candidate concept gets tagged **HAVE**, **STALE**, or **GAP** against existing coverage, then scored on five axes — Relevance, Usefulness, Novelty, Interest, Viability — before anything gets researched. Only gaps that clear the viability threshold get sent to `/dr`. The loop stops when two consecutive rounds of re-expansion turn up nothing new above threshold — evidence of saturation, not just a list running out. ## Where it sits Breadth, not depth: it maps everything *around* a subject and stops at one useful pass per neighbor. Its narrow inverse — going *inside* one concept instead of around it — is [rabbithole](/skills/rabbithole/). Once a family is mapped and worth compiling into a full llms-family reference set, [full-suite](/skills/full-suite/) is the next layer up. **Use it for:** "what am I missing about X", "map the conceptual family of X", "what skills should I build around X". **Not for:** a concrete, already-named topic (`/dr` directly) · a cited research report with no skill-building (`deep-research`) · reorganizing an existing skill tree with no new research ([skill-tree-architect](/skills/skill-tree-architect/)).