dsh-deck-builder 📽️

> A DeepSeek Harness tool plugin: convert Markdown into a self-contained HTML presentation (slides) — themes, keyboard navigation, zero dependencies, zero core changes.

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A DeepSeek Harness (DSH) pure tool plugin that registers the deck_build tool, letting the agent turn any Markdown (research reports, meeting notes, course outlines…) into a single-file HTML deck the user opens directly in a browser — ←/→ to navigate, f for fullscreen, one slide per page when printing. All generation logic is zero-dependency pure functions, and the output is fully self-contained (inline CSS/JS, no external assets, no network).

✨ Features

• deck_build tool: markdown → HTML slides, returns output path / slide count / bytes.
• Three themes: deepseek / light / dark, CSS variables inlined.
• Smart splitting: splits on --- / *** / ___ rules, falling back to H1/H2 headings when no rules exist.
• Full Markdown rendering: headings, paragraphs, ordered/unordered lists, code blocks, blockquotes, bold/italic, inline code, links, images.
• Zero dependencies, zero core changes: pure ctx.tools.register, no client bundle, no network, no external assets.
• Pure-function tested: splitting / rendering / escaping / self-containment all covered by unit tests.

📦 Install

Prereqs: DSH (dsh web works), Node ≥ 22.19, pnpm.

# From GitHub (prebuilt lib/ committed)
dsh plugin --profile web add "github:Blaczz/dsh-deck-builder#main"

# Local directory
cd dsh-deck-builder && npm install --legacy-peer-deps && npm run build
dsh plugin --profile web add ./dsh-deck-builder

Restart dsh web after install, then ask the agent to "turn this into slides" or have it call deck_build directly.

🎬 Usage

In a conversation, ask the agent to build a deck:

Turn this research report into slides using the deepseek theme:
<markdown content>

The agent calls deck_build, producing deck-<title>.html. Open it and use ←/→ or space to navigate, f for fullscreen, and print/export to PDF for one-slide-per-page.

Or call the tool manually:

{
  "markdown": "# Title\nbody\n\n---\n\n# Slide 2\nmore",
  "title": "My Deck",
  "theme": "deepseek",
  "outputPath": "slides/my-deck.html"
}

🛠️ Development

npm install --legacy-peer-deps
$env:DSH_NODE_MODULES = "$env:USERPROFILE\.dsh\profiles\node_modules"
npm run setup:dsh-workspace
npm run verify                          # ★ one-shot gate: clean + typecheck + test + build
npm test                                # vitest (19 tests: splitting / rendering / self-containment / themes / escaping)

Layout

dsh-deck-builder/
├── package.json            # dsh.bundle.patch (pure tool plugin, no client half)
├── cordis.patch.yml        # bundle patch layer
├── scripts/                # build (tsc only) / clean / setup-dsh-workspace / verify
├── src/
│   ├── deck.ts             # ★ pure generation: splitSlides / renderBlocks / renderDeck
│   ├── theme.ts            # theme tokens (light/dark/deepseek)
│   └── index.ts            # host half: registers the deck_build tool
└── tests/                  # deck generation + manifest contract

🧩 Ecosystem positioning

• Fills a gap: the DSH Slides/PPT category previously had only dsh-openmaic (teaching) and dsh-k12-lesson-builder; a general "Markdown → presentation" tool was missing, even though mdPresenter proved the demand.
• Technical route: pure tool plugin (ctx.tools.register + defineTool), reusing the self-contained-HTML artifact shape of hccccc01333/dsh-report-html.
• Zero core changes: single-file output + zero-dependency pure functions + ctx.effect registration.

⚖️ License

MIT © 2026 Blaczz. An independent community plugin, not affiliated with DeepSeek Harness.