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---
name: concept-fan-expansion
description: Expand concept fan from purpose through concepts to directions to ideas (de Bono Concept Fan).
execution: subagent
prompt: ./prompt.md
input: purpose_statement (string)
used-by: lateral-thinking, concept-fan, concept-hierarchy
---
# Concept Fan Expansion
Expand concept fan from purpose through concepts to ideas.
## Execution
Subagent — spawned via subagent-spawning/spawn-agent skill.
## Why Subagent
Concept fan expansion requires maintaining multiple abstraction levels simultaneously and generating ideas at each level. Benefits from dedicated context that can hold the full fan structure while exploring each branch.
