What is aeo-citation-gap-finder?

A research tool that compares which web sources different AI assistants cite for the same questions.

Use it to compare citations for target prompts, find sources preferred by different AI systems, and identify content or visibility gaps.

It reveals when a source appears in Google's AI answers but not in other search results, or the reverse, showing where citation coverage differs.

aeo-citation-gap-finder — Skill by psyduckler/aeo-skills

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.

Any agent

npx skills add psyduckler/aeo-skills --skill aeo-citation-gap-finder

Clone the repo

git clone --depth 1 https://github.com/psyduckler/aeo-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/psyduckler/aeo-skills/aeo-citation-gap-finder/github.svg)](https://agentmods.dev/skills/psyduckler/aeo-skills/aeo-citation-gap-finder)

Your own site

<a href="https://agentmods.dev/skills/psyduckler/aeo-skills/aeo-citation-gap-finder"><img src="https://agentmods.dev/badge/skills/psyduckler/aeo-skills/aeo-citation-gap-finder/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/psyduckler/aeo-skills/aeo-citation-gap-finder"><img src="https://agentmods.dev/badge/skills/psyduckler/aeo-skills/aeo-citation-gap-finder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 137 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,380 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.

Model	Per session	Once invoked
Fable 5.1	$0.00137	$0.01380
Opus 5.5	$0.00055	$0.00552
Sonnet 5.5	$0.00027	$0.00276
Haiku 4.5	$0.00014	$0.00138

Measured 2mo ago against content hash af1a781b2a5d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

aeo-citation-gap-finder 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/_shared.py, scripts/find_gaps.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

aeo-citation-gap-finder/SKILL.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AEO Citation Gap Finder

Source: github.com/psyduckler/aeo-skills Part of: AEO Skills Suite

Compare what different AI models cite for the same prompts. Find gaps in your cross-platform AI visibility.

Why This Matters

Different AI models cite different sources for the same query. Google's AI Overviews (Gemini 3 Flash) use Google Search grounding. ChatGPT uses Bing. Perplexity uses its own search stack. A page that dominates Google AI citations may be invisible in ChatGPT, and vice versa.

This skill identifies those gaps so you can optimize content for cross-platform AI visibility.

How It Works

Google AI citations — Runs the prompt 20 times through Gemini 3 Flash with google_search grounding. This simulates real AI Overviews and gives reliable citation frequency data.
Web search citations — Searches the same prompt via Brave Search API (or web_search tool). The top organic results approximate what ChatGPT (Bing-powered) and Perplexity would cite, since they all draw from similar web indexes.
Gap analysis — Compares the two source sets:
- Google-only: Cited by Gemini but not in top web results → Google's AI has unique source preferences
- Web-only: In top web results but not cited by Gemini → traditional SEO winners that AI overlooks
- Both: Cited everywhere → strong cross-platform authority
Domain tracking — If you specify a domain, shows exactly where it appears vs where it's missing.

Requirements

Gemini API key (free) — set as GEMINI_API_KEY env var
Brave Search API key (optional) — set as BRAVE_API_KEY env var. If not set, web search comparison is skipped.
Python 3.9+
No pip dependencies (stdlib only)

Usage

# Full gap analysis with domain tracking
GEMINI_API_KEY="$GEMINI_API_KEY" \
BRAVE_API_KEY="$BRAVE_API_KEY" python3 scripts/find_gaps.py "best SEO tools for content optimization" --domain acme.com

# Without Brave (Gemini-only analysis)
GEMINI_API_KEY="$GEMINI_API_KEY" python3 scripts/find_gaps.py "best SEO tools for content optimization" --domain acme.com

# JSON output
GEMINI_API_KEY="$GEMINI_API_KEY" \
BRAVE_API_KEY="$BRAVE_API_KEY" python3 scripts/find_gaps.py "best SEO tools for content optimization" --domain acme.com --output json

Read the full file on GitHub · 129 lines

Files

What ships with it

2 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.

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.

2mo ago First seen · 129 lines · 137 tokens per session scan A af1a781b2a5d

Subscribe to this mod's changes

aeo-citation-gap-finder is a skill published in the GitHub repository psyduckler/aeo-skills (13 stars, last pushed 5mo ago), licensed MIT. It adds 137 tokens to every session and 1,380 once invoked, about $0.0005 per session on Opus 5.5. 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.

Analytics and metrics Research

aeo-citation-gap-finder next to 6 skills from other repositories
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aeo-citation-gap-finderpsyduckler/aeo-skills	Skill	13	5mo ago	MIT	A	137	Claude Code, Codex
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playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
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