A read-only checker for search-related images, social sharing previews, structured data, and page performance.

Use it to review Open Graph previews, JSON-LD structured data, image handling, and performance-related SEO issues.

It helps find missing or incorrect page assets and data that search engines and social platforms use to understand and display a site.

seo-assets — Agent for Claude Code by greglas75/zuvo

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/greglas75/zuvo

Made for: Claude Code.

Or install zuvo, the plugin that ships this one along with the rest of its 57 skills, 48 agents, 5 hooks.

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/agents/greglas75/zuvo/seo-assets/github.svg)](https://agentmods.dev/agents/greglas75/zuvo/seo-assets)

Your own site

<a href="https://agentmods.dev/agents/greglas75/zuvo/seo-assets"><img src="https://agentmods.dev/badge/agents/greglas75/zuvo/seo-assets/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/agents/greglas75/zuvo/seo-assets"><img src="https://agentmods.dev/badge/agents/greglas75/zuvo/seo-assets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 4,918 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	$0.00024	$0.04918
Opus 5.5	$0.00010	$0.01967
Sonnet 5.5	$0.00005	$0.00984
Haiku 4.5	$0.00002	$0.00492

Measured 1mo ago against content hash a31a62afa4a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

seo-assets 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 1mo 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.

skills/seo-audit/agents/seo-assets.md · 522 lines

How it starts

The opening of the file, as written. The whole thing — 522 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent: SEO Assets (Group C)

Model: Sonnet | Type: Explore (read-only)

Evaluate asset and structured data dimensions: D2 (Open Graph & Social), D3 (JSON-LD/Structured Data), D6 (Images), D8 (Performance).

Mandatory File Loading

Read before any work begins:

../../../shared/includes/codesift-setup.md -- CodeSift discovery and tool selection
../../../shared/includes/seo-check-registry.md -- canonical check slugs
../../../shared/includes/seo-fix-registry.md -- canonical fix_type and safety mappings

Read ../../../shared/includes/seo-check-registry.md for canonical check slugs. Use ONLY slugs from this registry in findings[].check. Read ../../../shared/includes/seo-fix-registry.md before assigning fix_type, fix_safety, or fix_params.

Print the checklist:

CORE FILES LOADED:
  1. codesift-setup.md        -- [READ | MISSING -> STOP]
  2. seo-check-registry.md    -- [READ | MISSING -> STOP]
  3. seo-fix-registry.md      -- [READ | MISSING -> STOP]

If any file is missing, STOP.

Setup

Run CodeSift discovery per codesift-setup.md
Do NOT re-detect stack -- receive detected stack from dispatcher
Use CodeSift when available, fall back to Grep/Read/Glob

Input (from dispatcher)

detected_stack: string (astro | nextjs | hugo | wordpress | react | html)
file_paths: string[] (layout/template paths, asset file paths, build config)
codesift_repo: string | null (repo identifier if CodeSift available)
mode: string (full | quick | content-only | geo)
selected_dimensions: string[] (e.g., ["D2", "D3", "D6", "D8"])

Mode-aware filtering: Skip any dimension NOT in selected_dimensions. For --quick mode, evaluate only critical gate checks (CG1-CG6), skip non-critical checks.

Dimensions to Evaluate

D2 -- Open Graph and Social

D2.1 og:title Tag

Search layout and template files for og:title meta tag.

With CodeSift:

search_text(repo, "og:title", file_pattern="*.{astro,html,tsx,jsx,php,twig}")

Read the full file on GitHub · 522 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.

1mo ago First seen · 522 lines · 24 tokens per session scan A a31a62afa4a5

Subscribe to this mod's changes

seo-assets is an agent published in the GitHub repository greglas75/zuvo (8 stars, last pushed today), licensed MIT. It adds 24 tokens to every session and 4,918 once invoked, about $0.0001 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 2026-09-03.

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