agentmods.dev

html-presentations

A tool for turning a Markdown slide specification into a standalone HTML presentation using a supplied visual template.

In plain words
What is it for?
Building HTML slides from Markdown, including title and content slides, highlighted text, image galleries, and Mermaid diagrams.
Why use it?
It removes the need to manually translate headings, bullets, images, quotes, and diagrams into slide markup.

Skill for Claude CodeCodex

Part of the html-presentations plugin — 1 skill shipped together

48 5mo ago A scan 23 tokens original MIT
View the source file dexhorthy/slopfiles
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/dexhorthy/slopfiles/html-presentations
Any agent
npx skills add dexhorthy/slopfiles --skill html-presentations
Clone the repo
git clone --depth 1 https://github.com/dexhorthy/slopfiles

Made for: Claude Code, Codex.

Or install html-presentations, the plugin that ships this one along with the rest of its 1 skill.

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,886 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00023 $0.01886
Opus 5 $0.00012 $0.00943
Sonnet 5 $0.00005 $0.00377
Haiku 4.5 $0.00002 $0.00189

Measured 3d ago against content hash 3eb5ca0a5d28, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

html-presentations 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/create_standalone.sh), 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.

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.

plugins/html-presentations/skills/html-presentations/SKILL.md · 228 lines

How it starts

The opening of the file, as written. The whole thing — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.

HTML Presentations

Convert a markdown spec file into an HTML presentation using the Poimandres-themed template.

Files

  • Template: {SKILLBASE}/template/index.html
  • Example spec: {SKILLBASE}/examples/spec.md
  • Build script: {SKILLBASE}/scripts/create_standalone.sh

Instructions

  1. Read the spec markdown file (e.g., spec.md)

  2. Read the template at {SKILLBASE}/template/index.html

  3. Parse the spec file:

    • Split on * * * to get individual slides
    • # Title = title slide (use <h1>)
    • ## Heading = slide heading (use <h2>)
    • - item = bullet list (use <ul><li>)
    • **bold** = emphasis (use <span class="accent"> or <span class="green">)
    • > quote = blockquote (use <blockquote class="quote">)
    • <img src="..."> = image (keep as-is, add class="shadow" if appropriate)
    • ```mermaid ``` = mermaid diagram (wrap in <div class="mermaid-wrapper"><pre class="mermaid">)
    • <!-- image gallery - VERTICAL --> = split images into separate slides (one per slide)
    • <!-- comment --> = other layout hints (e.g., <!-- big quote -->)

  4. Generate HTML slides:

    • Each slide is a <section class="slide"> (add centered class for title/image slides)
    • Preserve the template's head section (styles, scripts, mermaid config)
    • Preserve the navigation and script at the bottom

  5. Write output to index.html in the same directory as the spec, offer to open it using Bash for the user

  6. OPTIONAL Create standalone shareable HTML:

    • Run the build script to embed all PNG images as base64 data URIs
    • Output: FOLDERNAME-standalone.html (e.g., 2026-01-05-luciq-presentation-standalone.html)
    • Creates a single self-contained file (~2-3MB) that opens in any browser
    {SKILLBASE}/scripts/create_standalone.sh /path/to/presentation/folder

Slide Type Examples

Title Slide

<section class="slide centered">
  <h1>Presentation Title</h1>
  <p class="subtitle">Subtitle here</p>
</section>

Read the full file on GitHub · 228 lines

Files

What ships with it

12 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. 3d ago First seen · 228 lines · 23 tokens per session scan A 3eb5ca0a5d28

Subscribe to this mod's changes

html-presentations is a skill published in the GitHub repository dexhorthy/slopfiles (48 stars, last pushed 5mo ago), licensed MIT. It adds 23 tokens to every session and 1,886 once invoked, about $0.0001 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.

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