# Aim Web Diff

> Snapshot page main text twice (interval) or compare to a baseline JSON. Exit 0 = unchanged, 2 = changed, 1 = error. Headed CDP; stop after session.

- Skill: `brianv1981/aim-web-diff` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add brianv1981/aim-web-diff`
- Raw SKILL.md: https://api.skillmd.com/api/skills/brianv1981/aim-web-diff/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: BrianV1981 (https://skillmd.com/u/brianv1981)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/brianv1981/aim-web-diff

---


# aim-web-diff

```bash
# Baseline
npm run web-diff -- --url "https://example.com" --save-baseline /tmp/ex-base.json

# Compare later
npm run web-diff -- --url "https://example.com" --baseline /tmp/ex-base.json
echo $?   # 0 same, 2 changed

# Two captures in one run
npm run web-diff -- --url "https://example.com" --interval-ms 5000
```