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 lionkiii/claude-seo-skills --skill seo-content-briefgit clone --depth 1 https://github.com/lionkiii/claude-seo-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/lionkiii/claude-seo-skills/seo-content-brief)<a href="https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-content-brief"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-content-brief/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/lionkiii/claude-seo-skills/seo-content-brief"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-content-brief.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 | $0.00079 | $0.02239 |
| Opus 5 | $0.00039 | $0.01120 |
| Sonnet 5 | $0.00016 | $0.00448 |
| Haiku 4.5 | $0.00008 | $0.00224 |
Grade C, and why
seo-content-brief scanned grade C with 2 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 12d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- Verify with: cat ~/.claude/mcp.json | grep -i ahrefs Reads MCP configurationmediumAgent snooping
mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.
- Verify with: cat ~/.claude/mcp.json | grep -i ahrefs How it starts
The opening of the file, as written. The whole thing — 241 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO Content Brief Generator
Produces a structured, copy-pasteable content brief for writers by analyzing live SERP data from Ahrefs. When a site parameter is provided and GSC MCP is available, overlays current ranking position and click data for targeted improvement guidance.
Note: SERP analysis is inlined here — skills cannot call each other as sub-routines in Claude Code.
References
@skills/seo/references/mcp-degradation.md @skills/seo/references/ahrefs-api-reference.md @skills/seo/references/gsc-api-reference.md
Inputs
keyword: The target keyword for the content brief (required). Example:"best crm for startups"site(optional): GSC property URL to overlay existing ranking data. Accepts both formats:- Domain property:
sc-domain:example.com - URL prefix:
https://example.com/orhttps://www.example.com/
- Domain property:
MCP Check
Primary check (required):
- Use ToolSearch with query
+ahrefs - If tools returned → Ahrefs MCP is available, proceed to Execution
- If no tools returned → display the Ahrefs MCP error template from
references/mcp-degradation.mdand stop
Optional GSC check (only if site parameter was provided):
- Use ToolSearch with query
+google-search-console - If tools returned → GSC MCP is available, will overlay ranking data in Step 3
- If no tools returned → note "GSC data unavailable — brief generated from SERP data only" and proceed
Execution
Step 1 — SERP Analysis (INLINE)
Note: SERP analysis is inlined here because Claude Code skills cannot call each other as sub-routines. The following replicates the seo-serp logic directly.
1a. Use ToolSearch with query serp-overview to inspect the tool definition
and discover its parameter names. The keyword parameter may be named
keyword, query, or term — do not assume. Use the exact parameter name
found in the schema for the call.
1b. Call mcp__claude_ai_ahrefs__serp-overview using the discovered parameter
name with the user's keyword as the value.
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.
- 12d ago First seen · 241 lines · 79 tokens per session scan C d1500afacfe0
seo-content-brief is a skill published in the GitHub repository lionkiii/claude-seo-skills (20 stars, last pushed 3mo ago), licensed MIT. It adds 79 tokens to every session and 2,239 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (reads agent configuration directories, reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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