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image-seo-audit

image-seo-audit is a skill for Claude Code from indranilbanerjee/digital-marketing-pro. It costs 34 tokens per session (1,010 once invoked), scanned A, original, MIT.

An audit of a webpage's images for search visibility, loading speed, and accessibility—the ability of people using assistive technology to use the page.

In plain words
What is it for?
Checking alt text, file sizes and formats, responsive image settings, lazy loading, the main page image's loading priority, and dimensions that prevent layout shifts.
Why use it?
It identifies missing descriptions, oversized or outdated image files, and markup problems that can slow pages or make images harder to understand.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the digital-marketing-pro plugin — 164 skills, 5 commands, 24 agents shipped together

not rated 914repo +6 changed 20d ago A scan 34 tokens original MIT

Good fit Checking alt text, file sizes and formats, responsive image settings, lazy loading, the main page image's loading priority, and dimensions that prevent layout shifts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/indranilbanerjee/digital-marketing-pro/image-seo-audit
View source ↗ indranilbanerjee/digital-marketing-pro indranil.in
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 indranilbanerjee/digital-marketing-pro --skill image-seo-audit
Clone the repo
git clone --depth 1 https://github.com/indranilbanerjee/digital-marketing-pro

Made for: Claude Code.

Or install digital-marketing-pro, the plugin that ships this one along with the rest of its 164 skills, 5 commands, 24 agents.

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 image-seo-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit/github.svg)](https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit)
Your own site
<a href="https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit"><img src="https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit/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 image-seo-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit"><img src="https://agentmods.dev/badge/skills/indranilbanerjee/digital-marketing-pro/image-seo-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,010 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 $0.00034 $0.01010
Opus 5.5 $0.00014 $0.00404
Sonnet 5.5 $0.00007 $0.00202
Haiku 4.5 $0.00003 $0.00101

Measured 20d ago against content hash d0d819128827, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

image-seo-audit 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 20d 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/image-seo-audit/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/digital-marketing-pro:image-seo-audit

Purpose

Perform a dedicated image optimization audit that evaluates all images on a page or site for SEO, performance, and accessibility. Produces a prioritized optimization list sorted by file size impact.

Input Required

  • URL: Page or site to audit
  • Scope: Single page or site-wide crawl (default: single page)

Process

  1. Load brand context: Read active brand profile for industry context.
  2. Discover images: Find all <img>, <picture>, CSS background-image, and <source> elements.
  3. Alt text audit: Check presence, quality, keyword inclusion, length (10-125 chars). Flag: missing, filename-only ("image.jpg"), keyword-stuffed, non-descriptive ("click here").
  4. File size audit: Apply tiered thresholds by image category — thumbnails (<50KB target, >200KB critical), content images (<100KB target, >500KB critical), hero/banner (<200KB target, >700KB critical).
  5. Format audit: Check for modern formats. Recommend WebP (97%+ support) or AVIF (92%+ support) over JPEG/PNG. Check for <picture> element with format fallbacks. Note: JPEG XL restored in Chromium (Nov 2025) but not yet in Chrome stable — monitor, don't recommend yet.
  6. Responsive images: Check for srcset and sizes attributes, appropriate resolution for device pixel ratios.
  7. Lazy loading: Verify loading="lazy" on below-fold images. Flag loading="lazy" on above-fold/hero images (directly harms LCP).
  8. fetchpriority: Check for fetchpriority="high" on LCP/hero images. Check for decoding="async" on non-LCP images.
  9. CLS prevention: Check for width and height attributes or aspect-ratio CSS on all <img> elements. Flag images without dimensions.
  10. File naming: Check for descriptive, hyphenated, lowercase file names vs generic names (IMG_1234.jpg).
  11. CDN usage: Check if images are served from a CDN (different domain, CDN headers, edge caching).
  12. Score and prioritize: Sort by file size savings impact (largest first).

Read the full file on GitHub · 91 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. 20d ago Changed · -105 tokens per session d0d819128827
  2. 1mo ago First seen · 91 lines · 139 tokens per session scan A 663656ef2152

Subscribe to this mod's changes

image-seo-audit is a skill published in the GitHub repository indranilbanerjee/digital-marketing-pro (914 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 1,010 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 2026-09-07.

CSS and stylingClaude CodeFrontendMarketing and SEOaeoclaude-plugincontent-marketingmarketing-automationseo
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