Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/sergekostenchuk/seo-llm-skill-clusternpx agentmods add skills/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validatorWrote 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/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validator)<a href="https://agentmods.dev/skills/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validator"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validator/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/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validator"><img src="https://agentmods.dev/badge/skills/sergekostenchuk/seo-llm-skill-cluster/backlink-quality-validator.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 | $0.00076 | $0.00614 |
| Opus 5 | $0.00038 | $0.00307 |
| Sonnet 5 | $0.00015 | $0.00123 |
| Haiku 4.5 | $0.00008 | $0.00061 |
Grade A, and why
backlink-quality-validator 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 11d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- backlink-quality-validator — 97% identical, 6 lines differ
How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Backlink Quality Validator
Use this skill after an opportunity is proposed by a scout or after a backlink already exists.
Read ./plans/seo-llm-skill-cluster/authority/white-hat-authority-policy.md
before validating a placement.
Read references/validation-rubric.md before producing a verdict.
Owns
- backlink quality review;
- relevance and target-page fit;
- link attribute review (
follow,nofollow,ugc,sponsored); - anchor text risk;
- spam/toxicity risk;
- platform compliance notes;
- approval or rejection recommendation.
Does Not Own
- finding opportunities;
- posting or editing links;
- paid placement negotiation;
- external outreach;
- Search Console/rank attribution;
- disavow decisions without broader SEO review.
Workflow
- Identify source URL, target URL, anchor text, link location, and context.
- Check relevance and user value.
- Check link attribute and disclosure expectations.
- Check platform-rule status.
- Identify spam, toxicity, PBN, directory, fake review, and paid-undisclosed risk.
- Score the backlink as
approve,revise,reject, orneeds_more_evidence. - Provide exact reason and safe next step.
Non-Negotiables
- Reject link farms, PBNs, fake reviews, hidden links, irrelevant directories, and paid-undisclosed links.
- Reject anchor text that is misleading or stuffed.
- Do not claim a backlink improves rankings without measurement.
- Do not edit external pages.
- Do not recommend disavow unless the broader context and risk are reviewed.
Safety And Privacy Boundaries
- Do not store private outreach, account credentials, paid-placement negotiations, or private analytics in reports.
- If source pages include private or sensitive content, summarize without exposing it.
- Mark unknown platform rules as unknown rather than assuming permission.
Output Shape
Return:
- Validation verdict.
- Source/target/anchor/context.
- Scores and rationale.
- Link attribute and disclosure notes.
- Platform-rule status.
- Risks and required fixes.
- Monitoring or recheck date.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 80 lines · 76 tokens per session scan A e4c0435f3c95
backlink-quality-validator is a skill published in the GitHub repository sergekostenchuk/seo-llm-skill-cluster (39 stars, last pushed 3mo ago), licensed MIT. It adds 76 tokens to every session and 614 once invoked, about $0.0004 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 2026-08-30.
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