OpenGSC: Skill for Claude Code

.agents/skills/keyword-research/SKILL.md

keyword-research is a skill for Claude Code, Codex from fenjo26/OpenGSC. It costs 52 tokens per session (1,328 once invoked), scanned A, original, MIT.

Keyword research that starts with topics, products, or audience problems and produces a prioritized list of search terms. It uses a site's existing Google Search Console data and stored research before any paid research.

In plain words
What is it for?
Use it to find search terms worth targeting, measure demand and difficulty for selected terms, and decide whether to rewrite a page, fix its focus, or create new content.
Why use it?
It separates terms that need an existing page improved from terms that need a new page or a better match to what people want, instead of treating search volume alone as a plan.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument; installed under .agents/ (shared by several agents).

This is fenjo26/OpenGSC's own configuration. It tells Claude Code and Codex how to work on OpenGSC itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything OpenGSC configures →

Reuse

Borrowing it

Nothing to install: this file belongs to fenjo26/OpenGSC. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/fenjo26/OpenGSC/main/.agents/skills/keyword-research/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/fenjo26/OpenGSC

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for keyword-research

README.md
[![agentmods](https://agentmods.dev/badge/skills/fenjo26/opengsc/keyword-research/github.svg)](https://agentmods.dev/skills/fenjo26/opengsc/keyword-research)
Your own site
<a href="https://agentmods.dev/skills/fenjo26/opengsc/keyword-research"><img src="https://agentmods.dev/badge/skills/fenjo26/opengsc/keyword-research/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.

agentmods 80×15 button for keyword-research

Your own site · 80×15
<a href="https://agentmods.dev/skills/fenjo26/opengsc/keyword-research"><img src="https://agentmods.dev/badge/skills/fenjo26/opengsc/keyword-research.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,328 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
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 Excessive Agency · line 96
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Excessive Agency · line 97
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.01328
Opus 5 $0.00026 $0.00664
Sonnet 5 $0.00010 $0.00266
Haiku 4.5 $0.00005 $0.00133

Measured 10d ago against content hash 82b40189db16, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

keyword-research 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 10d 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.

.agents/skills/keyword-research/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenGSC Keyword Research

Goal

Produce a short list of keywords the user should act on, each one labelled with what the action actually is — improve an existing page, fix an intent mismatch, or write something new. Volume alone is not a plan.

The free path comes first

Only one tool here spends money, and most research questions are answered without it. Work in this order and stop as soon as the answer is good enough:

  1. Queries the site already earns. get_search_performance, get_striking_distance.
  2. Research already bought. get_keyword_demand — a seed researched in the last 14 days comes back at no cost, and with no seed it lists everything already stored.
  3. Metrics already cached. get_keyword_metrics for volume/difficulty on a fixed list.
  4. Only then research_keywords, which is PAID and needs explicit permission.

An agent that opens with the paid tool has skipped three sources of the same information.

Required inputs

  • The site. If unknown, call list_sites first and ask which one.
  • One or more seed topics, products, or audience problems.
  • Optional: market (2-letter country code, default us) and language.

If the market would materially change the numbers and the user has not said, ask. A German market research run against us is not a smaller answer, it is a wrong one.

OpenGSC MCP tools

  • get_striking_distance: queries at positions 4–20 with real impressions. This is demand the site has already proven it can reach — it outranks anything discovery returns.
  • get_keyword_demand: stored research joined against the site's own GSC positions. Every row carries a verdict (see below). Free. Call before anything paid.
  • get_keyword_metrics: volume, difficulty and CPC for a known keyword list, from the cache the UI and CSV imports fill. A keyword missing here has not been loaded — that is not zero volume.
  • research_keywords: PAID. DataForSEO discovery from one seed, verdicted against GSC. ~$0.03 per call at the default 150 rows. Requires confirm: true.
  • get_competitor_gap: keywords competitors rank for, bucketed the same way. Free, but only returns rows if a competitor has already been pulled in the Competitors screen.
  • get_content_groups: if the user has Content Groups or Topic Clusters, map findings onto them — it is how they already think about the site.
  • get_generations: what has already been written. Recommending a page that exists wastes the user's time and makes the rest of the report look unchecked.

Read the full file on GitHub · 106 lines

Changes

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.

  1. 10d ago First seen · 106 lines · 52 tokens per session scan A 82b40189db16

Subscribe to this mod's changes

keyword-research is a skill published in the GitHub repository fenjo26/OpenGSC (22 stars, last pushed today), licensed MIT. It adds 52 tokens to every session and 1,328 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 2026-08-30.

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