web-perf

web-perf is a skill for Claude Code, Codex from secondsky/sap-skills. It costs 96 tokens per session (2,051 once invoked), scanned A, original, GPL-3.0.

A web-performance audit tool that uses Chrome DevTools to measure loading and interaction behavior in a browser. It checks Core Web Vitals—metrics for loading speed, responsiveness, and visual stability—along with related network and accessibility problems.

In plain words
What is it for?
Use it to audit, profile, debug, or optimize websites; measure LCP, INP, CLS, FCP, TBT, and Speed Index; and investigate rendering, network, layout, caching, and accessibility issues.
Why use it?
It replaces guesswork with measurements and points to likely causes such as blocking files, slow request chains, layout shifts, and caching problems. This makes it easier to decide what to fix first.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

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.

agentmods
npx agentmods add skills/secondsky/sap-skills/web-perf
Any agent
npx skills add secondsky/sap-skills --skill web-perf
Clone the repo
git clone --depth 1 https://github.com/secondsky/sap-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.

agentmods badge for web-perf

README.md
[![agentmods](https://agentmods.dev/badge/skills/secondsky/sap-skills/web-perf.svg)](https://agentmods.dev/skills/secondsky/sap-skills/web-perf)
Your own site
<a href="https://agentmods.dev/skills/secondsky/sap-skills/web-perf"><img src="https://agentmods.dev/badge/skills/secondsky/sap-skills/web-perf.svg" alt="Measured on agentmods" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,051 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00096 $0.02051
Opus 5 $0.00048 $0.01026
Sonnet 5 $0.00019 $0.00410
Haiku 4.5 $0.00010 $0.00205

Measured 6d ago against content hash 94c5cb377666, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

web-perf 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 6d 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.

.agents/skills/web-perf/SKILL.md · 202 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 6d ago First seen · 202 lines · 96 tokens per session scan A 94c5cb377666

Subscribe to this mod's changes

web-perf is a skill published in the GitHub repository secondsky/sap-skills (434 stars, last pushed 2d ago), licensed GPL-3.0. It adds 96 tokens to every session and 2,051 once invoked, about $0.0005 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.

Related

Other skills, from other repositories

ghost-scraper

Extracts structured data from websites — static HTML, JavaScript-rendered SPAs, paginated listings, and API-backed pages. Handles anti-bot detection awareness, rate limiting, and robots.txt compliance. Use this skill whenever the user wants to scrape a website, extract data from a URL, pull product listings, harvest…

mturac/hermes-supercode-skills · 139 tokens

odata

Help with OData service development in ABAP including OData V2 and V4 services via RAP service bindings, SEGW-based services, service definitions, service bindings, OData annotations, consumption of external OData services, and troubleshooting common OData errors. Use when users ask about OData, OData V2, OData V4…

likweitan/abap-skills · 167 tokens

sap-mm

This skill handles SAP MM (Materials Management) including purchase requisitions, purchase orders, goods receipts, invoice verification, inventory management, GR/IR clearing, material master, vendor evaluation, and period-end closing. Use when user mentions MM, purchasing, procurement, MIGO, MIRO, ME21N, ME23N, MB52…

BoxLogoDev/sapstack · 117 tokens

abap-code-review

Performs structured pre-release security and quality review of SAP ABAP programs across 9 dimensions (SEC, AUTH, DATA, PERF, STD, INTERFACE, CHANGE, COMP, FUNC), producing a formal sign-off-ready Markdown assessment report. Trigger when the user asks to review, audit, assess, or check ABAP code before release …

shrek-abaper/sap-engineering-skill · 162 tokens

sap-hcm

This skill handles SAP HCM (Human Capital Management) on-premise topics covering ECC HCM and HCM for S/4HANA (H4S4). Includes personnel administration, organizational management, payroll, time management, benefits, and FI/CO posting integration. Use when user mentions HCM, HR, PA30, infotype, payroll, PC00, time…

BoxLogoDev/sapstack · 133 tokens

sap-bc

This skill handles SAP BC (Basis Component) tasks from the Korean consulting field perspective. Use when the user mentions BC, 베이시스, Solution Manager Korea, HANA locale, 한국 세금계산서, e-Document, 망분리, KISA, 공인인증서, 전자서명, 한국 특수 STMS, PFCG 한국 권한, SM50/SM66 한국어 환경, 한국어 SAPGUI, Unicode 변환, 한국 고객지원 OSS, 한국 SAP BTP 리전, local 코드…

BoxLogoDev/sapstack · 226 tokens