content-decay-detector

1# Content Decay Detector
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3Monitor existing content for ranking drops and generate a prioritized refresh queue. Refreshing decaying content is the highest-ROI SEO activity — it's faster and cheaper than creating new content, and recovering a lost position is easier than earning a new one.
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5## Stage
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7S3: Blog & SEO — Blog maintenance and optimization. This skill keeps your existing content competitive and prevents rankings from silently eroding.
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9## When to Use
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11- User has existing blog content and wants to check for decay
12- User notices traffic declining on specific pages
13- User asks "what content needs updating?"
14- User says "content decay", "ranking drops", "stale content", "refresh", "content audit"
15- Monthly maintenance check — should run every 30 days on active blogs
16- After `seo-audit` reveals declining pages
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18## Input Schema
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20```yaml
21site_url: string              # REQUIRED — the site to audit
22                              # e.g., "myblog.com", "example.com/blog"
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24content_list: object[]        # OPTIONAL — specific pages to check
25  - url: string               # Page URL
26    title: string             # Page title
27    publish_date: string      # Original publish date
28    last_updated: string      # Last update date
29    target_keyword: string    # Primary keyword
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31check_competitors: boolean    # OPTIONAL — whether to check if competitors published fresher content
32                              # Default: true
33…