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kirby-performance-and-media

kirby-performance-and-media is a skill for Claude Code, Codex from bnomei/kirby-mcp. It costs 37 tokens per session (520 once invoked), scanned A, original, MIT.

A Kirby CMS performance and media skill for improving caching, content delivery, and image handling. Kirby is a system for building and managing websites.

In plain words
What is it for?
Use it to check CDN and local media URLs, lazy loading, responsive images, thumbnail generation, page caching, and conditional frontend libraries in Kirby.
Why use it?
It helps diagnose slow pages and inefficient image delivery, including problems caused by missing caching or unnecessarily large image variants.

Skill for Claude CodeCodex

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

not rated 59repo 13d ago A scan SkillSpector: pass 37 tokens original MIT

Good fit Use it to check CDN and local media URLs, lazy loading, responsive images, thumbnail generation, page caching, and conditional frontend libraries in Kirby.

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Install with agentmods
npx agentmods add skills/bnomei/kirby-mcp/kirby-performance-and-media
View source ↗ bnomei/kirby-mcp forum.getkirby.com
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 bnomei/kirby-mcp --skill kirby-performance-and-media
Clone the repo
git clone --depth 1 https://github.com/bnomei/kirby-mcp

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 kirby-performance-and-media

README.md
[![agentmods](https://agentmods.dev/badge/skills/bnomei/kirby-mcp/kirby-performance-and-media/github.svg)](https://agentmods.dev/skills/bnomei/kirby-mcp/kirby-performance-and-media)
Your own site
<a href="https://agentmods.dev/skills/bnomei/kirby-mcp/kirby-performance-and-media"><img src="https://agentmods.dev/badge/skills/bnomei/kirby-mcp/kirby-performance-and-media/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 kirby-performance-and-media

Your own site · 80×15
<a href="https://agentmods.dev/skills/bnomei/kirby-mcp/kirby-performance-and-media"><img src="https://agentmods.dev/badge/skills/bnomei/kirby-mcp/kirby-performance-and-media.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 520 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 $0.00037 $0.00520
Opus 5 $0.00018 $0.00260
Sonnet 5 $0.00007 $0.00104
Haiku 4.5 $0.00004 $0.00052

Measured 12d ago against content hash f8ea457253ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

kirby-performance-and-media 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 12d 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/kirby-performance-and-media/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kirby Performance and Media

Quick start

  • Follow the workflow below, and run a full audit checklist when performance work spans multiple templates or plugins.

KB entry points

  • kirby://kb/scenarios/55-cdn-asset-and-media-urls
  • kirby://kb/scenarios/56-lazy-loading-images
  • kirby://kb/scenarios/57-responsive-images-srcset
  • kirby://kb/scenarios/58-fine-tune-page-cache
  • kirby://kb/scenarios/79-conditional-loading-frontend-libraries

Required inputs

  • Target pages/templates and performance symptoms.
  • Image/media volume and CDN constraints.
  • Acceptable cache settings or invalidation rules.

Audit checklist

  • Identify templates that render large image sets or long listings.
  • Check kirby://config/cache and kirby://config/thumbs for overrides.
  • Verify media URLs, cache headers, and variant generation.

Measurement step

  • Inspect Cache-Control headers and confirm generated /media variants exist.

CDN fallback rule

  • If the CDN is unavailable, fall back to local asset/media URLs without breaking pages.

Common pitfalls

  • Generating thumbnails in loops without srcset() or caching.
  • Routing media through a CDN without preserving variants.

Workflow

  1. Call kirby:kirby_init and read kirby://config/cache and kirby://config/thumbs.
  2. Inspect templates/snippets that render large collections of images:
    • kirby:kirby_templates_index
    • kirby:kirby_snippets_index
  3. Search the KB with kirby:kirby_search (examples: "cdn asset and media urls", "lazy loading images", "responsive images srcset", "fine tune page cache").
  4. Apply minimal changes first:
    • use srcset()/sizes for responsive images
    • add loading="lazy" and decoding="async"
    • adjust cache ignore rules via blueprint options or fields
    • route assets/media through a CDN when required
  5. Verify output and caching behavior:
    • kirby:kirby_render_page(noCache=true) for HTML
    • inspect generated media variants and cache headers in a browser

Read the full file on GitHub · 60 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. 12d ago First seen · 60 lines · 37 tokens per session scan A f8ea457253ac

Subscribe to this mod's changes

kirby-performance-and-media is a skill published in the GitHub repository bnomei/kirby-mcp (59 stars, last pushed 13d ago), licensed MIT. It adds 37 tokens to every session and 520 once invoked, about $0.0002 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.

CSS and stylingClaude CodeCloudDevOps and cloudFrontendagentic-workflowclicodex-clicommandsgoogle-gemini
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