design-simple-deck

design-simple-deck is a skill for Claude Code, Codex from the-sid-dani/second-brain-os. It costs 74 tokens per session (1,011 once invoked), scanned A, original, MIT.

A single-file HTML presentation made of horizontal, swipeable slides. It uses prepared slide layouts for pitch decks, product overviews, and study material.

In plain words
What is it for?
Use it to create browser-based decks, product presentations, pitch materials, or study slides. It supports composing slides from the provided layouts and viewing them with horizontal navigation.
Why use it?
It provides a defined presentation structure without requiring a separate slide application or build setup. The included navigation handles movement between slides in an embedded page.

Skill for Claude CodeCodex

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/the-sid-dani/second-brain-os/design-simple-deck
Any agent
npx skills add the-sid-dani/second-brain-os --skill design-simple-deck
Clone the repo
git clone --depth 1 https://github.com/the-sid-dani/second-brain-os

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 design-simple-deck

README.md
[![agentmods](https://agentmods.dev/badge/skills/the-sid-dani/second-brain-os/design-simple-deck.svg)](https://agentmods.dev/skills/the-sid-dani/second-brain-os/design-simple-deck)
Your own site
<a href="https://agentmods.dev/skills/the-sid-dani/second-brain-os/design-simple-deck"><img src="https://agentmods.dev/badge/skills/the-sid-dani/second-brain-os/design-simple-deck.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,011 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 $0.00074 $0.01011
Opus 5 $0.00037 $0.00505
Sonnet 5 $0.00015 $0.00202
Haiku 4.5 $0.00007 $0.00101

Measured 5d ago against content hash fba62f048843, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

design-simple-deck 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 5d 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.

.claude/skills/design-simple-deck/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Simple Deck Skill

Produce a single-file horizontal-swipe HTML deck using the seed and layout library.

Resource map

simple-deck/
├── SKILL.md                ← you're reading this
├── assets/
│   └── template.html       ← seed: tokens + slide primitives + proven nav script (READ FIRST)
└── references/
    ├── layouts.md          ← 8 paste-ready slide layouts + theme-rhythm rules
    └── checklist.md        ← P0/P1/P2 self-review (rhythm spot-check at bottom)

Workflow

Step 0 — Pre-flight

  1. Read assets/template.html end-to-end through the <style> block AND the <script> block. The script solves five iframe-specific bugs (real scroller detection, dual capture-phase listeners, auto-focus, no scrollIntoView, position persistence) — do not rewrite it.
  2. Read references/layouts.md so you know the 8 layouts. Pay special attention to the "Theme rhythm" section — it's the rule that prevents the deck from feeling sleepy.
  3. Read the active DESIGN.md — map its tokens to the six :root variables in the seed.

Step 1 — Copy the seed

Copy assets/template.html to the project root as index.html. Replace the six :root variables with the active design system's tokens. Replace the page <title>.

Step 2 — Decide slide count + theme rhythm BEFORE writing any slide

Default: 6 slides unless the brief says otherwise.

Audience / format Slides
Product overview / lightning talk (5–10 min) 6
Pitch deck (15 min) 8–10
Investor update / longer talk (20–30 min) 12–18

Then write out the rhythm before any HTML — for example, 8 slides:

01  hero light center  Cover
02  light              Problem
03  hero dark center   Big stat
04  light              Three points
05  dark               Pipeline
06  hero light center  Quote
07  light              Before / after
08  hero dark center   Ask

A healthy sequence has:

  • No 3+ same theme in a row
  • ≥ 1 hero dark AND ≥ 1 hero light (for 8+ slides)
  • Alternating breath every 3–4 slides

Read the full file on GitHub · 100 lines

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. 5d ago First seen · 100 lines · 74 tokens per session scan A fba62f048843

Subscribe to this mod's changes

design-simple-deck is a skill published in the GitHub repository the-sid-dani/second-brain-os (2 stars, last pushed 29d ago), licensed MIT. It adds 74 tokens to every session and 1,011 once invoked, about $0.0004 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.

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