# Concept Fan Expansion

> Expand concept fan from purpose through concepts to directions to ideas (de Bono Concept Fan).

- Skill: `yogsoth-ai/concept-fan-expansion` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add yogsoth-ai/concept-fan-expansion`
- Raw SKILL.md: https://api.skillmd.com/api/skills/yogsoth-ai/concept-fan-expansion/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: yogsoth-ai (https://skillmd.com/u/yogsoth-ai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/yogsoth-ai/concept-fan-expansion

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# 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.

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## Available SOPs

Optional, no fixed order; the final leaf is always a sop.

| SOP | When to use |
| --- | --- |
| spawn-agent | Spawn a customized CC subagent with full MCP tool access. Used by SOPs that declare execution: subagent. |

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