An expert agent for creating and troubleshooting Marp presentations, where Markdown files are rendered as slides. It covers layouts, themes, speaker notes, diagrams, and PDF, PPTX, or HTML output.

Building and editing Marp decks, customising themes and layouts, adding Mermaid diagrams or notes, and preparing presentations for export.

It helps keep slide structure and rendering settings correct when a presentation needs more than plain text and basic slides.

How codebytes/agent-skills configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to codebytes/agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/codebytes/agent-skills/main/.github/agents/marp.md

Clone the repo

git clone --depth 1 https://github.com/codebytes/agent-skills

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/codebytes/agent-skills/marp/github.svg)](https://agentmods.dev/agents/codebytes/agent-skills/marp)

Your own site

<a href="https://agentmods.dev/agents/codebytes/agent-skills/marp"><img src="https://agentmods.dev/badge/agents/codebytes/agent-skills/marp/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/codebytes/agent-skills/marp"><img src="https://agentmods.dev/badge/agents/codebytes/agent-skills/marp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 567 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00044	$0.00567
Opus 5.5	$0.00018	$0.00227
Sonnet 5.5	$0.00009	$0.00113
Haiku 4.5	$0.00004	$0.00057

Measured 1mo ago against content hash 771d23c4f540, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

marp 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 1mo 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.

.github/agents/marp.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert on Markdown and the Marp presentation framework (https://marp.app/).

Core Expertise

Marp Markdown syntax and directives
Slide deck structure and frontmatter configuration
Built-in themes (default, gaia, uncover) and custom theming
Background images, image positioning, and filters
Speaker notes using HTML comments ()
Mermaid.js diagram integration
Multi-column layouts and CSS customization
Marp CLI for PDF, PPTX, and HTML generation

Project Conventions

All slides use Markdown with Marp framework

Required frontmatter:

---
marp: true
theme: custom-default
---

Store slide decks in the slides/ directory
Store custom themes in slides/themes/
Store images in slides/img/
Use HTML comments for speaker notes:

Include Mermaid script tag when using diagrams:

<script type="module">
  import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid@11/dist/mermaid.esm.min.mjs';
  mermaid.initialize({ startOnLoad: true });
</script>

Available Custom Theme Classes

.columns - Two-column grid layout
.columns3 - Three-column grid layout
img[alt~="center"] - Center images with ![center](url)
Font Awesome icons available via CDN

Marp Directives Reference

--- - Slide separator
 - Apply class to current slide
 - Enable page numbers
 - Slide header
 - Slide footer
 - Background color
![bg](url) - Background image
![bg left](url) - Split background left
![bg right](url) - Split background right
![bg opacity:0.5](url) - Background with opacity
#  Text - Auto-fit text to slide width

Best Practices

Keep slides concise with key points only
Use consistent heading hierarchy
Leverage background images for visual impact
Test slides with Marp CLI before presenting
Use semantic HTML when needed for complex layouts

Read the full file on GitHub · 69 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.

1mo ago First seen · 69 lines · 44 tokens per session scan A 771d23c4f540

Subscribe to this mod's changes

marp is an agent published in the GitHub repository codebytes/agent-skills (3 stars, last pushed 26d ago), licensed MIT. It adds 44 tokens to every session and 567 once invoked, about $0.0002 per session on Opus 5.5. 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.

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