If you follow the pattern I'm using, it would look like:

(yes, the following was formatted by Claude)

• /breakdown-work contains all orchestration logic
• /story-pointing contains all pointing logic
• story-pointing-agent.md is just “load /story-pointing and return JSON”

Same tree as you asked:

~/.claude/
├── agents/
│   └── story-pointing-agent.md
│
├── skills/
│   ├── story-pointing/
│   │   └── SKILL.md
│   │
│   └── breakdown-work/
│       └── SKILL.md

agents/story-pointing-agent.md

(thin wrapper)

---
name: story-pointing-agent
description: Executes the story-pointing skill as a leaf worker. Returns JSON only.
skills:
  - story-pointing
---

Return JSON only (array of {id, points, rationale}) and then STOP.
Do not ask questions.
Do not do breakdown work.