seo-drift — Технічне SEO, навичка для агента від agricidaniel/claude-seo

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# SEO Drift Comparison Rules

17 rules across 3 severity levels. Each rule compares a specific SEO element
between the stored baseline and the current page state.

---

## CRITICAL (Immediate Action Required)

These changes typically cause measurable traffic loss within days.

### Rule 1: Schema/JSON-LD Completely Removed
- **Compare**: Baseline `schema` array has items, current is empty
- **Threshold**: Any schema present before, none now
- **Action**: Restore structured data immediately. Eligible rich results (Product, Review, LocalBusiness, and similar supported types) can drop from SERPs quickly; retired types (FAQ, HowTo) should not be treated as rich-result losses.
- **Cross-ref**: `/seo schema <url>`

### Rule 2: Canonical URL Changed
- **Compare**: Baseline `canonical` vs current `canonical`
- **Threshold**: Different non-null values (after normalization)
- **Action**: Verify the new canonical is intentional. Incorrect canonicals redirect ranking signals to wrong page.
- **Cross-ref**: `/seo technical <url>`

### Rule 3: Canonical URL Removed
- **Compare**: Baseline `canonical` was set, current is `null`
- **Threshold**: Had value, now missing
- **Action**: Restore canonica

---
name: seo-drift
description: >
  SEO drift monitoring: capture baselines of SEO-critical elements, detect changes,
  and track regressions over time. Git for SEO: baseline, diff, and track changes
  to your on-page SEO. Use when user says "SEO drift", "baseline", "track changes",
  "did anything break", "SEO regression", "compare SEO", "before and after",
  "monitor SEO changes", or "deployment check".
user-invocable: true
argument-hint: "baseline|compare|history <url>"
license: MIT
metadata:
  author: AgriciDaniel
  original_author: "Dan Colta (Pro Hub Challenge)"
  version: "2.2.5"
  category: seo
---

# SEO Drift Monitor (April 2026)

Git for your SEO. Capture baselines, detect regressions, track changes over time.

---

## Commands

| Command | Purpose |
|---------|---------|
| `/seo drift baseline <url>` | Capture current SEO state as a "known good" snapshot |
| `/seo drift compare <url>` | Compare current page state to stored baseline |
| `/seo drift history <url>` | Show change history and past comparisons |

---

## What It Captures

Every baseline records these SEO-critical elements:

| Element | Field | Source |
|---------|-------|--------|
| Title tag | `title` | `pa