# Validation

> Cross-cutting validation methodology for verifying phase outputs and project integrity

- Skill: `josstei/validation-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add josstei/validation-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/josstei/validation-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: josstei (https://skillmd.com/u/josstei)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/josstei/validation-3

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Methodology loaded via MCP. Call `get_skill_content(resources: ["validation"])`.