# Single Factor Removal

> Remove one specified factor from the artifact's support structure and reason about how the conclusion changes.

- Skill: `yogsoth-ai/single-factor-removal` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add yogsoth-ai/single-factor-removal`
- Raw SKILL.md: https://api.skillmd.com/api/skills/yogsoth-ai/single-factor-removal/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/single-factor-removal

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# Single Factor Removal

Ablation unit: removes one factor and reasons about conclusion stability.

## Execution

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

## Why Subagent

Each removal must be reasoned about independently to avoid contamination from other removal results.

## Input

- **artifact**: The original artifact
- **factor_to_remove**: Which factor to remove
- **factors_list**: All factors (for context of what remains)

## Output

- **conclusion_before**: Original conclusion status
- **conclusion_after**: Conclusion status without this factor
- **degradation_score**: 0.0 (no effect) to 1.0 (collapse)
- **reasoning**: Why the conclusion is/isn't affected

## Budget

One unit = one factor removal per invocation.

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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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