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 Infrasity-Labs/dev-gtm-claude-skills --skill blog-cannibalizationgit clone --depth 1 https://github.com/Infrasity-Labs/dev-gtm-claude-skillsWrote 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/infrasity-labs/dev-gtm-claude-skills/blog-cannibalization)<a href="https://agentmods.dev/skills/infrasity-labs/dev-gtm-claude-skills/blog-cannibalization"><img src="https://agentmods.dev/badge/skills/infrasity-labs/dev-gtm-claude-skills/blog-cannibalization/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/infrasity-labs/dev-gtm-claude-skills/blog-cannibalization"><img src="https://agentmods.dev/badge/skills/infrasity-labs/dev-gtm-claude-skills/blog-cannibalization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 79 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 95 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00106 | $0.01778 |
| Opus 5 | $0.00053 | $0.00889 |
| Sonnet 5 | $0.00021 | $0.00356 |
| Haiku 4.5 | $0.00011 | $0.00178 |
Grade A, and why
blog-cannibalization 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 9d 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 — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Blog Cannibalization - Keyword Overlap Detection
Detect when multiple blog posts compete for the same search keywords. Two modes: local-only analysis (default) and DataForSEO API mode for SERP-level data.
Two Modes
| Mode | Flag | Cost | Data Source |
|---|---|---|---|
| Local | (default) | Free | File content analysis via Grep/Read |
| API | --api |
~$0.01/call | DataForSEO Page Intersection + Ranked Keywords |
Local mode works without any API keys. API mode requires DataForSEO credentials
set as environment variables: DATAFORSEO_LOGIN and DATAFORSEO_PASSWORD.
Local Mode Workflow
Step 1: Scan Blog Files
Use Glob to find all content files in the target directory:
- Patterns:
**/*.md,**/*.mdx,**/*.html - Skip files in
node_modules/,.git/,drafts/
Step 2: Extract Primary Keywords
For each file, read and extract keyword signals from:
- Title tag or H1 heading (highest weight)
- H2 headings (medium weight)
- First paragraph (supporting signal)
- Meta description if present in frontmatter
Primary keyword extraction method:
- Tokenize title and H1 into 1-gram, 2-gram, and 3-gram phrases
- Score each phrase by frequency across title + H2s + first paragraph
- Select the top-scoring 2-3 word phrase as the primary keyword
- Record secondary keywords from H2 headings
Step 3: Cluster by Similarity
Group posts into clusters using these matching rules (in priority order):
- Exact match - identical primary keyword across 2+ posts
- Stem match - same root word (e.g., "optimize" vs "optimization")
- Semantic overlap - Claude determines that two keywords target the same search intent (e.g., "best CRM software" vs "top CRM tools 2026")
- Subset match - one keyword contains another (e.g., "email marketing" vs "email marketing for startups")
Step 4: Score and Flag
For each cluster with 2+ posts, assess severity and generate a recommendation.
Step 5: Output Report
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.
- 9d ago First seen · 200 lines · 106 tokens per session scan A dff030a58641
blog-cannibalization is a skill published in the GitHub repository Infrasity-Labs/dev-gtm-claude-skills (124 stars, last pushed 2mo ago), licensed MIT. It adds 106 tokens to every session and 1,778 once invoked, about $0.0005 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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