Oh My PPT is a local-first desktop application that uses AI to create, edit, present, and export editable HTML-based slide presentations. It is for people making presentations, lessons, stories, reports, or pitches who want to describe their content and then adjust the resulting pages, visuals, animations, and layouts.
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.
npx skills add arcsin1/oh-my-ppt --skill vertical-3-4-layout-skillgit clone --depth 1 https://github.com/arcsin1/oh-my-pptWrote 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.
[](https://agentmods.dev/skills/arcsin1/oh-my-ppt/vertical-3-4-layout-skill)<a href="https://agentmods.dev/skills/arcsin1/oh-my-ppt/vertical-3-4-layout-skill"><img src="https://agentmods.dev/badge/skills/arcsin1/oh-my-ppt/vertical-3-4-layout-skill/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.
<a href="https://agentmods.dev/skills/arcsin1/oh-my-ppt/vertical-3-4-layout-skill"><img src="https://agentmods.dev/badge/skills/arcsin1/oh-my-ppt/vertical-3-4-layout-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00070 | $0.01507 |
| Opus 5 | $0.00035 | $0.00754 |
| Sonnet 5 | $0.00014 | $0.00301 |
| Haiku 4.5 | $0.00007 | $0.00151 |
Grade A, and why
vertical-3-4-layout-skill 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.
How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Vertical 3:4 Layout Skill
This skill is the layout source of truth for vertical-3-4 pages, usually 1200x1600.
A 3:4 page is a vertical poster-card canvas. It has enough width for rich information cards and compact two-column pockets, but its reading path is still vertical. The layout should feel like a poster with one strong anchor and grouped evidence, not a long feed of equal blocks.
This canvas is a poster card, not a compressed slide. When the source content is dense or "needs to be summarized", summarize or regroup it for this reading format instead of cramming a 16:9 deck's worth of outline into one page.
Deep details live in the references:
references/catalog.md- named poster-card patterns and 1200x1600 zone skeletons.references/checklist.md- P0/P1/P2 structural self-check for delivery.
Preflight
Before writing HTML, decide:
- Message - the one sentence this card should make the viewer remember.
- Focal anchor - title block, hero metric, chart, image/diagram, framework, or conclusion.
- Support groups - start with 3-4 support bands (or 5-6 compact rows/chips for grouped facts), then regroup or choose a denser pattern when the content genuinely needs it; do not squeeze extra material in by making it unreadable.
- Reading path - top claim -> main proof/value -> bottom synthesis/source.
- Density - low-medium for poster claims, medium for most information cards, high only for compact lists or matrices. Never use "high density" as a reason to exceed the 4-band cap.
- Pattern - use a structure from
references/catalog.mdas a starting point when it helps the reading path; it is not a closed template menu, and a fresh composition is welcome when it serves the page thesis. - Budget - estimate hero zone, main proof zone, bottom synthesis, gaps, and reserve.
Use the canvas dimensions from the prompt. If custom dimensions are supplied, preserve the same vertical poster relationships.
Canvas Grammar
What ships with it
3 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.
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.
- 5d ago Changed 00be40463506
- 10d ago First seen · 80 lines · 70 tokens per session scan A c76caa76406c
vertical-3-4-layout-skill is a skill published in the GitHub repository arcsin1/oh-my-ppt (1,943 stars, last pushed 5d ago), licensed Apache-2.0. It adds 70 tokens to every session and 1,507 once invoked, about $0.0003 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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