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Image Optimization Analysis · agricidaniel | DecimalAI

marketingby agricidaniel

Image Optimization Analysis

agricidaniel/seo-images

Source agricidaniel/claude-seo ↗License MIT

Image optimization analysis for SEO and performance. Checks alt text, file sizes, formats, responsive images, lazy loading, CLS prevention, image SERP rankings (via DataForSEO), and image file optimization (WebP/AVIF conversion, IPTC/XMP metadata injection).

SkillScore91Maintained

Automatic

Marketing & Content pack

Last verified 9/19/2026

What it changes

Passed 20 of 22 test cases with the skill, and 18 of 22 without it.

Without skill83%

With skill91%

Checks it passed that the model alone missed

Categorizes the 400KB hero image as exceeding its 300KB warning threshold.
Flags the 250KB content image for exceeding the 200KB content image warning threshold.
Explains that missing AI source labels can cause Merchant Center product feed disapprovals.

2 fixed19 passed either way2 still failing0 broke

Pass-rate lift: +9 pp
Tokens: +204%
Agent turns: 0%
Response time: +1%

Model gemini-3.6-flashMeasured 9/19/2026v3 · latest is v421 of 23 cases passed with skill · 22 comparable

Tokens, turns and time describe resource use, not a dollar price.

This benchmark measured an earlier version of the skill.

A newer attempt on gemini-3.6-flash on 10/2/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/agricidaniel-seo-images/SKILL.md https://app.decimal.ai/s/agricidaniel-seo-images/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add agricidaniel-seo-images, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/agricidaniel-seo-images/ and pins it in .decimal/skills.lock

decimalai skills add agricidaniel-seo-images

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/agricidaniel-seo-images/SKILL.md https://app.decimal.ai/s/agricidaniel-seo-images/SKILL.md

Raw file: /s/agricidaniel-seo-images/SKILL.md ↗ · machine-readable summary at /s/agricidaniel-seo-images.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 2

Prompt

We generated synthetic lifestyle imagery using a generative diffusion model for our Google Merchant Center product feed. What IPTC metadata header must be embedded in the image files to satisfy Merchant Center policy requirements?

What was checked, without and with the skill
Checked	Without skill	With skill
Identifies `trainedAlgorithmicMedia` as the required IPTC DigitalSourceType value for synthetic images.	Passed	Passed
Explains that missing AI source labels can cause Merchant Center product feed disapprovals.	Missed	Passed

case-15 · gemini-3.6-flash · 9/19/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md418 linessingle file

Image Optimization Analysis

Checks

Alt Text

Present on all <img> elements (except decorative: role="presentation")
Descriptive: describes the image content, not "image.jpg" or "photo"
Includes relevant keywords where natural, not keyword-stuffed
Length: 10-125 characters

Good examples:

"Professional plumber repairing kitchen sink faucet"
"Red 2024 Toyota Camry sedan front view"
"Team meeting in modern office conference room"

Bad examples:

"image.jpg" (filename, not description)
"plumber plumbing plumber services" (keyword stuffing)
"Click here" (not descriptive)

File Size

Tiered thresholds by image category:

Image Category	Target	Warning	Critical
Thumbnails	< 50KB	> 100KB	> 200KB
Content images	< 100KB	> 200KB	> 500KB
Hero/banner images	< 200KB	> 300KB	> 700KB

Recommend compression to target thresholds where possible without quality loss.

Format

Format	Browser Support	Use Case
WebP	97%+	Default recommendation
AVIF	92%+	Best compression, newer
JPEG	100%	Fallback for photos
PNG	100%	Graphics with transparency
SVG	100%	Icons, logos, illustrations

Track record

Benchmark

20 / 22

test cases passed, vs 18 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 10/1/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

agricidaniel / claude-seo

skills/seo-images/SKILL.md

View on GitHub ↗

License MITImported 10/8/2026Version v4

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Image Optimization Analysis

Checks

Alt Text

File Size

Format

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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