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 agentmods add skills/zacspa/presentationbuilder/presentation-buildernpx skills add zacspa/PresentationBuilder --skill presentation-buildergit clone --depth 1 https://github.com/zacspa/PresentationBuilderWhat 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 | $0.00037 | $0.01774 |
| Opus 5 | $0.00018 | $0.00887 |
| Sonnet 5 | $0.00007 | $0.00355 |
| Haiku 4.5 | $0.00004 | $0.00177 |
Grade A, and why
presentation-builder 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 2d 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Presentation Builder
You are helping build and iterate on a native SwiftUI macOS presentation app. This app replaces slide decks with a live, animated, interactive experience using a proven architecture.
The user's message after /presentation-builder describes what phase they're in or what they want to do. If nothing is provided, assess the current state of the project and suggest what to work on next.
Getting Started
If the user doesn't already have a presentation project, scaffold one from the bundled template:
- Copy the
template/directory from this plugin into the user's chosen project directory - Rename the package and app as needed
- Run
swift buildto verify the template compiles - Begin with Phase 1 (Story Arc)
The template is a complete, buildable Swift Package (macOS 14+, Swift 5.9) with placeholder content ready to customize.
Architecture Overview
The presentation app uses three separation layers:
-
Story Arc (
StoryArc.swift) — The single authoring surface. An array ofSlideDescriptorentries defines the entire presentation: titles, bullets, presenter notes, stage content, and time budgets organized by acts. -
Scene Registry (
SceneRegistry.swift) + Element Catalog (ElementCatalog.swift) — The visual layer. SceneRegistry maps SceneID → element positions using unit coordinates (0–1). ElementCatalog maps string keys → SwiftUI views. Together they define what appears on screen for each scene. -
Persistent Canvas (
PersistentCanvasView.swift) — The animation engine. A long-lived ZStack that never destroys. When the active scene changes, elements animate to new states: entering elements get spring + staggered delay, exiting elements get fast ease-out.
Stage Content Types
.scene(SceneID)— static/animated diagram on canvas.scenes([SceneID])— multiple diagrams, advance with steps within a slide.takeover(TakeoverType)— full interactive overlay replacing the canvas.sceneThenTakeover(SceneID, TakeoverType)— diagram first, then interactive
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.
- 2d ago First seen · 140 lines · 37 tokens per session scan A 6b5d7ff86118
presentation-builder is a skill published in the GitHub repository zacspa/PresentationBuilder (9 stars, last pushed 5mo ago), licensed MIT. It adds 37 tokens to every session and 1,774 once invoked, about $0.0002 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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