seo-cwv

seo-cwv is a skill for Claude Code, Codex from Orkas-AI/Orkas. It costs 3 tokens per session (740 once invoked), scanned A, original, MIT.

A website performance checker that uses Google’s PageSpeed Insights service to report Core Web Vitals. It compares real-user data with estimates from simulated tests.

In plain words
What is it for?
Use it to check loading speed, visual stability, and interaction response on mobile or desktop pages, including before-and-after performance fixes.
Why use it?
It helps distinguish how a site performs for actual visitors from how it performs in a controlled test. This avoids relying only on HTML inspection when diagnosing speed and layout problems.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to check loading speed, visual stability, and interaction response on mobile or desktop pages, including before-and-after performance fixes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/orkas-ai/orkas/seo-cwv
About the project

Orkas is a desktop application for commanding a team of AI agents through one chat, with a commander model assigning work to specialist agents in parallel or in sequence. People use it to coordinate research, writing, presentations, and software tasks while keeping files on their computer. The catalogue includes skills for extending the agents available to Orkas.

Orkas-AI/Orkas · 1,885 stars · on GitHub · orkas.ai

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 Orkas-AI/Orkas --skill seo-cwv
Clone the repo
git clone --depth 1 https://github.com/Orkas-AI/Orkas

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.

agentmods badge for seo-cwv

README.md
[![agentmods](https://agentmods.dev/badge/skills/orkas-ai/orkas/seo-cwv/github.svg)](https://agentmods.dev/skills/orkas-ai/orkas/seo-cwv)
Your own site
<a href="https://agentmods.dev/skills/orkas-ai/orkas/seo-cwv"><img src="https://agentmods.dev/badge/skills/orkas-ai/orkas/seo-cwv/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-cwv

Your own site · 80×15
<a href="https://agentmods.dev/skills/orkas-ai/orkas/seo-cwv"><img src="https://agentmods.dev/badge/skills/orkas-ai/orkas/seo-cwv.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 740 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00003 $0.00740
Opus 5 $0.00002 $0.00370
Sonnet 5 $0.00001 $0.00148
Haiku 4.5 $0.00000 $0.00074

Measured 11d ago against content hash dab116c51042, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

seo-cwv 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 11d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/cwv.py, test/test_cwv.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.

resources/builtin/marketplace/agents/e064dca9e1bd/skills/seo-cwv/SKILL.md · 50 lines

What it actually says

seo-cwv

Measure Core Web Vitals with the free PageSpeed Insights API. Field data (CrUX, real users) is reported as Measured; lab (Lighthouse synthetic) as Estimated.

When to use

  • The diagnose flow wants real performance / CWV signals (the other skills are HTML-only).
  • Checking LCP/CLS/INP before/after a performance fix.

When NOT to use

  • On-page HTML SEO (meta/headings/schema) — those skills cover it.
  • Bulk auditing many URLs fast — keyless PSI is rate-limited (set a key).

Preconditions

  • Network access to googleapis.com (honors HTTP(S)_PROXY automatically). Optional free API key via --key or ORKAS_PAGESPEED_KEY (keyless works but is rate-limited). Python 3.9+ stdlib only. PSI is slow (synthetic run) — default timeout 60s.

How to call

"$ORKAS_NODE" "$ORKAS_PC_DIR/bin/run-skill.cjs" seo-cwv cwv -- <url> [--strategy mobile|desktop] [--key <k>] [--out <cwv.json>]

Expected output

{ "ok": true, "data": {
  "strategy": "mobile", "performance_score": 42,
  "lab":   { "lcp_ms": 4100, "cls": 0.28, "tbt_ms": 600, "fcp_ms": 2100, "si_ms": 5000 },
  "field": { "lcp_ms": 4200, "cls": 0.30, "inp_ms": 540, "fcp_ms": 2200, "overall_category": "SLOW", "has_field_data": true },
  "findings": [ { "id": "lcp_poor", "dimension": "performance", "severity": "high",
                  "evidence": "...", "recommendation": "...", "leading_indicator": "...",
                  "failure_criterion": "...", "data_tier": "Measured" } ],
  "summary": { "total": 1 }, "meta": { "url": "...", "field_data": true } } }

Findings use dimension: "performance" and feed seo-report --add. Failure: {"ok": false, "error": "..."} (e.g. PSI quota/error) on stderr, non-zero exit.

Thresholds (Google)

LCP good ≤2500ms / poor >4000ms · CLS good ≤0.10 / poor >0.25 · INP good ≤200ms / poor >500ms. Field (CrUX) is preferred and Measured; lab is the fallback and Estimated. INP comes from field only (lab has TBT as a proxy).

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.

  1. 11d ago First seen · 50 lines · 3 tokens per session scan A dab116c51042

Subscribe to this mod's changes

seo-cwv is a skill published in the GitHub repository Orkas-AI/Orkas (1,885 stars, last pushed yesterday), licensed MIT. It adds 3 tokens to every session and 740 once invoked, about $0.0000 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 2026-08-30.

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