Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add norahe0304-art/30x-seo --skill 30x-seo-content-decaygit clone --depth 1 https://github.com/norahe0304-art/30x-seoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-content-decay)<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-content-decay"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-content-decay/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-content-decay"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-content-decay.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00043 | $0.01028 |
| Opus 5.5 | $0.00017 | $0.00411 |
| Sonnet 5.5 | $0.00009 | $0.00206 |
| Haiku 4.5 | $0.00004 | $0.00103 |
Grade A, and why
30x-seo-content-decay scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Content Decay Detection
Find declining old content that needs refresh
What is Content Decay
Content "rots" over time:
- Information becomes outdated (2023 data is stale in 2026)
- Competitors publish better content
- Search intent changes
- Google algorithm updates
Result: Rankings drop → Traffic drops → Revenue drops
Detection Criteria
| Metric | Threshold | Description |
|---|---|---|
| Publication Date | >6 months | New content doesn't count as decay |
| Traffic Change | Down >20% | Compared to 3 months ago |
| Ranking Change | Down >5 positions | Primary keyword |
| CTR Change | Down >15% | Title may need updating |
Trigger Refresh: Meeting any 2 criteria = needs refresh
Workflow
Method A: With GSC Data
User provides GSC export (CSV)
↓
Analyze each URL:
- Impression trends
- Click trends
- Average position trends
- CTR trends
↓
Identify decaying content
↓
Output refresh priority list
Method B: Without GSC Data
User provides URL list
↓
Check each page:
- Publication date / Last updated date
- Content timeliness signals (years, "latest", etc.)
- Competitor SERP analysis (your content vs Top 10)
↓
Identify potentially decaying content
↓
Output recommendation list
Output Format
# Content Decay Report
## High Priority Refresh (High Traffic Impact)
| Page | Published | Traffic Change | Rank Change | Issue | Recommendation |
|------|-----------|----------------|-------------|-------|----------------|
| /blog/best-crm-2024 | 2024-03 | -45% | -8 positions | Year outdated | Update to 2026 version |
| /guide/remote-work | 2023-11 | -30% | -5 positions | Tool recommendations outdated | Update tool list |
## Medium Priority Refresh
| Page | Published | Issue | Recommendation |
|------|-----------|-------|----------------|
| ... | ... | ... | ... |
## Refresh Recommendations
### /blog/best-crm-2024
**Problem Diagnosis**:
- Title contains "2024", outdated
- Pricing info may be inaccurate
- Missing 2025-2026 new features
**Refresh Checklist**:
- [ ] Update title to "Best CRM 2026"
- [ ] Verify all prices
- [ ] Add new tools (X, Y, Z)
- [ ] Update screenshots
- [ ] Check all external links are valid
- [ ] Update dateModified in Schema
**Estimated Impact**: Recover ~40% traffic
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 185 lines · 43 tokens per session scan A 8aa824e556d9
30x-seo-content-decay is a skill published in the GitHub repository norahe0304-art/30x-seo (56 stars, last pushed 7mo ago), licensed MIT. It adds 43 tokens to every session and 1,028 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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