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 XuanRanL/loamwright-SEO-Skill --skill drift-detectorgit clone --depth 1 https://github.com/XuanRanL/loamwright-SEO-SkillWrote 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/xuanranl/loamwright-seo-skill/drift-detector)<a href="https://agentmods.dev/skills/xuanranl/loamwright-seo-skill/drift-detector"><img src="https://agentmods.dev/badge/skills/xuanranl/loamwright-seo-skill/drift-detector/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/xuanranl/loamwright-seo-skill/drift-detector"><img src="https://agentmods.dev/badge/skills/xuanranl/loamwright-seo-skill/drift-detector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00054 | $0.00482 |
| Opus 5 | $0.00027 | $0.00241 |
| Sonnet 5 | $0.00011 | $0.00096 |
| Haiku 4.5 | $0.00005 | $0.00048 |
Grade A, and why
drift-detector 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 8d 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.
What it actually says
Drift Detector
Per claude-seo 17-rule diff pattern.
Workflow
1. python -m scripts.monitor.drift_baseline --site {slug} --url {url} # snapshot
2. python -m scripts.monitor.drift_compare --site {slug} --baseline {sha} # 17 rules
Output: drift-report-{date}.json with 3 severity levels
17 rules (per claude-seo)
| Rule | Severity |
|---|---|
| 1. Title tag changed | high |
| 2. Meta description changed | medium |
| 3. H1 changed | high |
| 4. Canonical URL changed | high |
| 5. Robots meta changed (noindex added) | critical |
| 6. JSON-LD schema removed | high |
| 7. JSON-LD schema type changed | medium |
| 8. Featured image removed | medium |
| 9. Internal links count -20%+ | medium |
| 10. External Tier-1 link removed | high |
| 11. Word count dropped >30% | high |
| 12. H2 count changed by ±2 | medium |
| 13. AIO citation lost | critical |
| 14. Broken outbound link emerged | medium |
| 15. AI bots robots.txt policy changed | high |
| 16. SSL/HTTPS broken | critical |
| 17. dateModified missing | low |
Cross-skill recommendations
Per rule, suggest:
- 5/13 → trigger ai-overview-recovery
- 9/14 → trigger internal-linker / link verification
- 6/7 → trigger schema-generator
- 1/3/11 → likely manual review needed
- 16 → halt all operations; site emergency
See also
scripts/monitor/drift_baseline.py(TODO)scripts/monitor/drift_compare.py(TODO)
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.
- 8d ago First seen · 54 lines · 0 tokens per session scan A bfb698a61051
drift-detector is a skill published in the GitHub repository XuanRanL/loamwright-SEO-Skill (49 stars, last pushed 25d ago), licensed Apache-2.0. It adds 54 tokens to every session and 482 once invoked, about $0.0003 per session on Opus 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 2026-09-03.
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