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claude-code-best-practice/.claude/skills/presentation/presentation-structure/SKILL.md
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---
name: presentation-structure
description: Knowledge about the presentation slide format, weight system, navigation, and section structure
---
# Presentation Structure Skill
Knowledge about how the presentation at `presentation/index.html` is structured.
## File Location
`presentation/index.html` — a single-file HTML presentation with inline CSS and JS.
## Slide Format
Each slide is a div with `data-slide` (sequential number) and optional `data-level` (journey level at transition points):
```html
<!-- Regular slide — inherits level from previous data-level slide -->
<div class="slide" data-slide="12">
<h1>Slide Title</h1>
<!-- content -->
</div>
<!-- Level transition slide — sets new level for this slide and all following -->
<div class="slide section-slide" data-slide="10" data-level="low">
<h1>Section Name</h1>
<p class="section-desc">Level: Low — description of this section</p>
</div>
<!-- Title slide (centered) -->
<div class="slide title-slide" data-slide="1">
<h1>Presentation Title</h1>
<p class="subtitle">Subtitle text</p>
</div>
```
## Journey Bar Level System
The presentation uses a 4-level system instead of cumulative percentages:
- Levels are set via `data-level` attribute on key transition slides (section dividers)
- All slides after a `data-level` slide inherit that level until the next transition
- The journey bar fills to 25% / 50% / 75% / 100% for Low / Medium / High / Pro respectively
- The bar is hidden on slide 1 (title slide); from slide 2 onward the bar is shown
- Slides before the first `data-level` (slides 29) show an empty bar (no level yet set)
- A `.level-badge` is JS-injected on the `<h1>` of slides that carry `data-level` — do NOT hardcode in HTML
### Level Transitions by Section
| Section | Slide Range | data-level | Bar Height |
|---------|-------------|------------|------------|
| Part 0: Introduction | Slides 1-4 | (none) | hidden / empty |
| Part 1: Prerequisites | Slides 5-9 | (none) | empty |
| Part 2: Better Prompting | Slides 10-17 | `low` | 25% |
| Part 3: Project Memory | Slides 18-24 | `medium` | 50% |
| Part 4: Structured Workflows | Slides 25-28 | (inherits medium) | 50% |
| Part 5: Domain Knowledge | Slides 29-33 | `high` | 75% |
| Part 6: Agentic Engineering | Slides 34-46 | `high` | 75% |
| Appendix | Slides 47+ | (inherits high) | 75% |
## Navigation System
- `goToSlide(n)` — used in TOC links, must match actual `data-slide` numbers
- `totalSlides` is auto-computed from DOM (`document.querySelectorAll('[data-slide]').length`)
- Arrow keys, Space, and touch swipe for navigation
- Slide counter shows `current / total` at bottom-left
## Renumbering Rules
After adding, removing, or reordering slides:
1. Renumber ALL `data-slide` attributes sequentially starting from 1
2. Update all `goToSlide()` calls in the TOC/Journey Map slide
3. The JS `totalSlides` auto-computes — no manual update needed
4. Verify no gaps or duplicates exist
## Section Divider Format
Section dividers use the `section-slide` class. Level-transition section dividers carry `data-level` and show the level name in the description:
```html
<div class="slide section-slide" data-slide="10" data-level="low">
<p class="section-number">Part 2</p>
<h1>Better Prompting</h1>
<p class="section-desc">Level: Low — effective prompting for real results.</p>
</div>
```
The JS will inject a `.level-badge` (e.g., "→ Low") into the `<h1>` at runtime when the level transitions — do not add these manually in HTML.