A workflow for creating Marp slide decks in one Markdown text file. Marp is a tool that turns Markdown into slide previews and exports such as PDF, PowerPoint, HTML, and images.

It is for creating, changing, previewing, and exporting Markdown-based slide decks.

Keeping slides as text makes them easier to edit, review, and track in version control than a binary presentation file.

marp-deck — Skill for Claude Code and Codex by moonlight-lupin

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 moonlight-lupin/agent-skills --skill marp-deck

Clone the repo

git clone --depth 1 https://github.com/moonlight-lupin/agent-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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/moonlight-lupin/agent-skills/marp-deck/github.svg)](https://agentmods.dev/skills/moonlight-lupin/agent-skills/marp-deck)

Your own site

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

Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,571 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 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	$0.00057	$0.02571
Opus 5.5	$0.00023	$0.01028
Sonnet 5.5	$0.00011	$0.00514
Haiku 4.5	$0.00006	$0.00257

Measured 11d ago against content hash a7dcce58bc6c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

marp-deck scanned grade C with 2 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 9 executable files (scripts/export.sh, scripts/extract-pptx.py, scripts/md2pptx-officecli.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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://raw.githubusercontent.com/iOfficeAI/OfficeCLI/main/install.sh | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://raw.githubusercontent.com/iOfficeAI/OfficeCLI/main/install.sh | bash

productivity/marp-deck/SKILL.md · 137 lines

How it starts

The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Marp Deck

The deck is one .md file; everything else is rendered from it.

The render command

Every render in this skill — previews, the render check, exports — is this command plus its output flags:

npx --yes @marp-team/marp-cli <deck.md> --html --allow-local-files <output flags>

--html lets inline <svg> and HTML components render. Without it, every chart prints as literal markup text in PDF and PNG output.
--allow-local-files resolves relative image paths.
Output flags: --images png (one PNG per slide), --pdf, --pptx, --pptx --pptx-editable, -o deck.html.
If it cannot find a browser, set CHROME_PATH to a Chrome/Chromium binary.

scripts/preview.sh <dir> (Step 2) and scripts/export.sh <deck.md> pdf|pptx|html|all [--editable] (Step 5) wrap this command.

Step 0 — Route

Pick the branch, then follow only its steps:

Branch	When	Steps
New	Topic, notes or content to turn into a deck	1 → 2 → 3 → 4 → 5
Quick	Vague ask ("make it look good"), low stakes, or nobody to answer questions	1 and 2 without asking: infer the brief, pick the preset from the Quick table, state both in one line → 3 → 4 → 5
Import	A `.pptx` to rebuild as Markdown	Import → 1 (content and length come from the file; ask purpose and density) → 2 → 3 → 4 → 5
Edit	An existing Marp `.md`	read it; keep its frontmatter, theme and density → 3 on the requested slides only → 4 → 5

Step 1 — Brief

Ask these together in one message (a structured-question UI if available):

Purpose — pitch / board or investor reporting / teaching / conference talk / internal.
Length — talk duration or slide count. Guide: 5 min ≈ 5–8 slides, 10 min ≈ 10–15, 20 min ≈ 15–25.
Content — ready / rough notes / topic only. If ready, get it; if they supply images, judge each (usable? subject? dominant colours) and plan the outline around text and images together.
Density — the deck's governing choice:
- Speaker-led: one idea per slide, large type, 1–3 short lines, statement and quote slides, more slides.
- Reading-first: self-contained slides, grids and tables, 4–8 bullets or 4–6 cards, annotated diagrams.

Read the full file on GitHub · 137 lines

Files

What ships with it

18 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.

11d ago Changed a7dcce58bc6c
18d ago Changed · +13 lines scan A → C dca4ef7b1f08
19d ago First seen · 124 lines · 57 tokens per session scan A 54540d8b27a3

Subscribe to this mod's changes

marp-deck is a skill published in the GitHub repository moonlight-lupin/agent-skills (101 stars, last pushed today), licensed MIT. It adds 57 tokens to every session and 2,571 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-28.

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