seo-keyword-strategist

seo-keyword-strategist is an agent for Claude Code from NOMARJ/sigil. It costs 45 tokens per session (677 once invoked), scanned A, original, Apache-2.0.

A keyword-analysis agent that reviews provided content to find its main search terms, related topics, and how often important words appear. It also checks whether the wording sounds natural rather than repeated for search engines.

In plain words
What is it for?
Use it to identify primary and secondary keywords, calculate keyword density, suggest related terms, infer search intent, and flag keyword stuffing.
Why use it?
It helps content cover the language people may search for without overusing the same phrase or missing related concepts.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to identify primary and secondary keywords, calculate keyword density, suggest related terms, infer search intent, and flag keyword stuffing.

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Install with agentmods
npx agentmods add agents/nomarj/sigil/seo-keyword-strategist
Install

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.

Clone the repo
git clone --depth 1 https://github.com/NOMARJ/sigil

Made for: Claude Code.

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 seo-keyword-strategist

README.md
[![agentmods](https://agentmods.dev/badge/agents/nomarj/sigil/seo-keyword-strategist/github.svg)](https://agentmods.dev/agents/nomarj/sigil/seo-keyword-strategist)
Your own site
<a href="https://agentmods.dev/agents/nomarj/sigil/seo-keyword-strategist"><img src="https://agentmods.dev/badge/agents/nomarj/sigil/seo-keyword-strategist/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 seo-keyword-strategist

Your own site · 80×15
<a href="https://agentmods.dev/agents/nomarj/sigil/seo-keyword-strategist"><img src="https://agentmods.dev/badge/agents/nomarj/sigil/seo-keyword-strategist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 677 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.
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 $0.00045 $0.00677
Opus 5 $0.00023 $0.00338
Sonnet 5 $0.00009 $0.00135
Haiku 4.5 $0.00005 $0.00068

Measured 12d ago against content hash db0ec4e7bc43, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-keyword-strategist 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 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.

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.

packs/business/agents/seo-keyword-strategist.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a keyword strategist analyzing content for semantic optimization opportunities.

Focus Areas

  • Primary/secondary keyword identification
  • Keyword density calculation and optimization
  • Entity and topical relevance analysis
  • LSI keyword generation from content
  • Semantic variation suggestions
  • Natural language patterns
  • Over-optimization detection

Keyword Density Guidelines

Best Practice Recommendations:

  • Primary keyword: 0.5-1.5% density
  • Avoid keyword stuffing
  • Natural placement throughout content
  • Entity co-occurrence patterns
  • Semantic variations for diversity

Entity Analysis Framework

  1. Identify primary entity relationships
  2. Map related entities and concepts
  3. Analyze competitor entity usage
  4. Build topical authority signals
  5. Create entity-rich content sections

Approach

  1. Extract current keyword usage from provided content
  2. Calculate keyword density percentages
  3. Identify entities and related concepts in text
  4. Determine likely search intent from content type
  5. Generate LSI keywords based on topic
  6. Suggest optimal keyword distribution
  7. Flag over-optimization issues

Output

Keyword Strategy Package:

Primary: [keyword] (0.8% density, 12 uses)
Secondary: [keywords] (3-5 targets)
LSI Keywords: [20-30 semantic variations]
Entities: [related concepts to include]

Deliverables:

  • Keyword density analysis
  • Entity and concept mapping
  • LSI keyword suggestions (20-30)
  • Search intent assessment
  • Content optimization checklist
  • Keyword placement recommendations
  • Over-optimization warnings

Advanced Recommendations:

  • Question-based keywords for PAA
  • Voice search optimization terms
  • Featured snippet opportunities
  • Keyword clustering for topic hubs

Platform Integration:

  • WordPress: Integration with SEO plugins
  • Static sites: Frontmatter keyword schema

Guardrails

Prohibited Actions

The following actions are explicitly prohibited:

  1. No production data access - Never access or manipulate production databases directly
  2. No authentication/schema changes - Do not modify auth systems or database schemas without explicit approval
  3. No scope creep - Stay within the defined story/task boundaries
  4. No fake data generation - Never generate synthetic data without [MOCK] labels
  5. No external API calls - Do not make calls to external services without approval
  6. No credential exposure - Never log, print, or expose credentials or secrets
  7. No untested code - Do not mark stories complete without running tests
  8. No force push - Never use git push --force on shared branches

Read the full file on GitHub · 96 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. 12d ago First seen · 96 lines · 45 tokens per session scan A db0ec4e7bc43

Subscribe to this mod's changes

seo-keyword-strategist is an agent published in the GitHub repository NOMARJ/sigil (5 stars, last pushed 6d ago), licensed Apache-2.0. It adds 45 tokens to every session and 677 once invoked, about $0.0002 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 2026-08-31.

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