debug-optimize-lcp

debug-optimize-lcp is a skill for Claude Code from dsbissett/excel-webview2-mcp. It costs 100 tokens per session (1,525 once invoked), scanned A, original, no licence file.

A guide for diagnosing and improving Largest Contentful Paint, the time before a page's main visible content appears. It uses Excel WebView2 MCP tools.

In plain words
What is it for?
Investigating slow page loads, improving LCP, checking Core Web Vitals, and finding delays in the main page content.
Why use it?
It helps identify why a page loads slowly and addresses LCP, a website speed measure included in Google's Core Web Vitals.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the excel-webview2-mcp plugin — 8 skills, 2 MCP servers shipped together

Good fit Investigating slow page loads, improving LCP, checking Core Web Vitals, and finding…

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Install with agentmods
npx agentmods add skills/dsbissett/excel-webview2-mcp/debug-optimize-lcp
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 dsbissett/excel-webview2-mcp --skill debug-optimize-lcp
Clone the repo
git clone --depth 1 https://github.com/dsbissett/excel-webview2-mcp

Made for: Claude Code.

Or install excel-webview2-mcp, the plugin that ships this one along with the rest of its 8 skills, 2 MCP servers.

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 debug-optimize-lcp

README.md
[![agentmods](https://agentmods.dev/badge/skills/dsbissett/excel-webview2-mcp/debug-optimize-lcp.svg)](https://agentmods.dev/skills/dsbissett/excel-webview2-mcp/debug-optimize-lcp)
Your own site
<a href="https://agentmods.dev/skills/dsbissett/excel-webview2-mcp/debug-optimize-lcp"><img src="https://agentmods.dev/badge/skills/dsbissett/excel-webview2-mcp/debug-optimize-lcp.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,525 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 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 $0.00100 $0.01525
Opus 5 $0.00050 $0.00763
Sonnet 5 $0.00020 $0.00305
Haiku 4.5 $0.00010 $0.00153

Measured 6d ago against content hash 01ae2bdc0def, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

debug-optimize-lcp 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.

skills/debug-optimize-lcp/SKILL.md · 122 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

4 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. 6d ago First seen · 122 lines · 100 tokens per session scan A 01ae2bdc0def

Subscribe to this mod's changes

debug-optimize-lcp is a skill published in the GitHub repository dsbissett/excel-webview2-mcp (2 stars, last pushed 4mo ago), with no licence file. It adds 100 tokens to every session and 1,525 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 2026-08-31.

Related

Other skills, from other repositories