Add external validity transfer assistant

[taherdhanera]

/claim #16

Summary

• Adds a dependency-free external-validity transfer assistant for the AI-Powered Research Assistant Suite.
• Compares manuscript claims against linked evidence for population, setting, assay/instrument, runtime environment, subgroup coverage, and external validation support.
• Emits peer-review suggestions, reproducibility actions, research-gap prompts, and deterministic JSON/Markdown/SVG review artifacts from synthetic data.
• Includes a reproducible short demo video artifact for reviewer verification.

Non-overlap

This is not another broad assistant suite, preregistration checker, retraction sentinel, prompt-safety guard, statistical review, benchmark-leakage auditor, figure/table checker, supplement-readiness module, funding/COI checker, or evidence-trace assistant. It focuses specifically on whether manuscript claims transfer beyond the exact population, setting, assay, and runtime contexts represented by linked evidence.

Demo Artifact

• external-validity-transfer-assistant/reports/demo.webm
• Reproducible with npm run demo:video

Validation

• npm run check -> passed
• npm test -> external-validity-transfer-assistant tests passed
• npm run demo -> generated reports/summary.json, reports/reviewer-packet.md, and reports/summary.svg
• npm run demo:video -> generated reports/demo.webm
• git diff --check -> passed
• git diff --cached --check -> passed

Synthetic data only. No credentials, private manuscripts, protected health information, payment data, external APIs, or network calls are used by the module.

AI-assisted with OpenAI Codex; I reviewed and locally verified the diff before submitting.

[taherdhanera]

Added the short demo video artifact required by the issue guidelines in commit

[taherdhanera]

Correction to the previous truncated note: commit 032f328 adds the short demo video artifact required by the issue guidelines.

New artifact: external-validity-transfer-assistant/reports/demo.webm

Video generation is reproducible with: npm run demo:video

Validation refreshed after the video follow-up:

• npm run check: passed
• npm test: passed
• npm run demo: generated JSON/Markdown/SVG artifacts
• npm run demo:video: generated reports/demo.webm
• git diff --cached --check: passed