Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add f-labs-io/agent-html-skills/plugin install html-skillsWrote 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/f-labs-io/agent-html-skills/html-slideshow-deck)<a href="https://agentmods.dev/skills/f-labs-io/agent-html-skills/html-slideshow-deck"><img src="https://agentmods.dev/badge/skills/f-labs-io/agent-html-skills/html-slideshow-deck.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00109 | $0.02078 |
| Opus 5 | $0.00055 | $0.01039 |
| Sonnet 5 | $0.00022 | $0.00416 |
| Haiku 4.5 | $0.00011 | $0.00208 |
Grade A, and why
html-slideshow-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 3d 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 — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HTML Slideshow Decks
For presentations that need to be shared as a link, contain real code or live interactivity, or be quickly assembled from existing source material, an HTML deck beats PowerPoint. It opens in any browser, presents fullscreen, and embeds anything HTML embeds.
Pre-flight — run BEFORE writing the artifact
Invoke html-skills:html-skills-listen (Skill tool) first; it is idempotent. If it returns a URL, inject it verbatim as window.__CLAUDE_SUBMIT_URL__ in the HTML you are about to write, ?t= query string included (a local, single-session loopback handshake — not a credential). If it reported web/sandbox mode, leave that line out; submitToClaude then falls back to clipboard mode.
When to use this skill
- "Make me slides / a deck / a presentation for X"
- "Tech talk on X"
- "Brief leadership on Y"
- "Walking deck for new hires on Z"
- "Lightning talk / brown-bag on W"
- Whenever the deliverable is sequential and visual but the user wants a URL, not a file
For decks intended for corporate distribution (board meetings, customer pitches), still consider .pptx. For internal tech talks and async sharing, prefer HTML.
Output requirements
Keyboard-navigable: →/space for next, ← for previous, f for fullscreen, Esc to exit fullscreen. Fixed 16:9 slide aspect ratio (or 16:10), centered with letterboxing on wider/narrower screens.
Each slide is a <section> with class slide. The active slide is shown; others hidden. URL hash (#3) updates with slide number so direct linking works.
Include a thin progress bar or slide counter (e.g., "4 / 17") in a corner.
Core structure
- Title slide — title, subtitle, presenter, date
- Hook / motivation — why anyone should care
- Body slides — the substance
- Recap — the three things the audience should remember
- Q&A / closing — call to action, contact info
Don't pad. A 15-minute talk is ~12–15 slides for tech, fewer for narrative. More than 30 slides for a short talk usually means the speaker is reading, not presenting.
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.
- 3d ago Changed · +13 lines 322dbec367f3
- 7d ago First seen · 123 lines · 109 tokens per session scan A 2e60753777eb
html-slideshow-deck is a skill published in the GitHub repository f-labs-io/agent-html-skills (55 stars, last pushed 5d ago), licensed MIT. It adds 109 tokens to every session and 2,078 once invoked, about $0.0005 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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