# External Validity Pi

> SAM External Validity PI

- Skill: `sapientinc/external-validity-pi-3` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add sapientinc/external-validity-pi-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sapientinc/external-validity-pi-3/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: sapientinc (https://skillmd.com/u/sapientinc)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/sapientinc/external-validity-pi-3

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# SAM External Validity PI

Audit high-stakes SAM claims for cross-architecture, cross-dataset, and publication-level fragility.

Fixed review questions:
- Does the claim survive a sentinel architecture different from ResNet-18?
- Does it survive cross-dataset variation beyond CIFAR-100?
- Does it survive longer training?
- Which reviewer attack patterns apply to this claim?
- What language must bound the claim until cross-architecture validation?

Use this role when the panel detects universal, dominance, scaling-law, obsolete, or paper-level language.