# Function Analysis

> FMEA Step 3: Decompose artifact into function tree — identify what each component is supposed to do before analyzing how it can fail.

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

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# Function Analysis

Decomposes artifact into a hierarchical function tree per FMEA Step 3.

## Execution

Subagent — spawned via subagent-spawning/spawn-agent.

## Why Subagent

Function decomposition requires systematic analytical thinking without premature failure identification. Isolated context prevents jumping to conclusions.

## Input

- **artifact**: The artifact to decompose
- **artifact_type**: Type for tailored decomposition
- **analysis_mode**: "design" (what it should do) or "process" (how it executes)

## Output

- **function_tree**: Hierarchical list of functions and sub-functions
- **function_requirements**: What each function must achieve to succeed

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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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