# Investigate

> Chain-loaded investigation. 5-phase Iron Law methodology with root cause gate.

- Skill: `catlog22/investigate-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add catlog22/investigate-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/catlog22/investigate-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: catlog22 (https://skillmd.com/u/catlog22)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/catlog22/investigate-2

---

# Investigate (Chain-Loaded)
Use `chain_loader` to execute:
- `chain_loader start --chain=ccw-investigate` — Full investigation
- `chain_loader start --chain=ccw-investigate --entry=from-hypothesis` — Skip to hypothesis testing
Phases are inline in chain JSON.
Variables: root_cause, confidence