---

description: Convert long-form markdown (specs, RFCs, reports, plans, explainers) into a single-file interactive HTML document. Runs the md-document pipeline (parser → renderer → injector) with the user's design-system tokens. Sticky TOC, search filter, code-copy buttons, scrollspy, WCAG-AA palette. Refuses input < 100 lines (Shihipar) or unfinished onboarding. Output is a single .html file (Google Fonts + Prism.js CDN as the only externals). argument-hint: " [--out ] [--features search,copycode,smoothscroll,scrollspy]"

/cs:md-document — Long-form markdown → HTML

Convert the markdown at $ARGUMENTS into a single-file interactive HTML document.

Pre-flight gates (refuse, never override)

1. Input < 100 lines → refuse (markdown wins below the threshold per Shihipar). wc -l <path> to confirm.
2. Design-system not onboarded → refuse, surface /cs:design-system.
3. Output directory unwritable → refuse, ask user for an alternate via --out.

Pipeline

# 1. Classify (if not already routed by orchestrator)
python3 markdown-html/skills/markdown-html-orchestrator/scripts/doctype_classifier.py \
    --input "<path>.md" --output json \
  | python3 markdown-html/skills/markdown-html-orchestrator/scripts/route_explainer.py

# 2. Resolve the output path
python3 markdown-html/skills/markdown-html-orchestrator/scripts/output_path_resolver.py \
    --input "<path>.md" --doctype document

# 3. Parse → render → inject
python3 markdown-html/skills/md-document/scripts/markdown_parser.py \
    --input "<path>.md" --output /tmp/sections.json
python3 markdown-html/skills/md-document/scripts/html_renderer.py \
    --sections /tmp/sections.json --output <resolved-out>.html
python3 markdown-html/skills/md-document/scripts/interactivity_injector.py \
    --file <resolved-out>.html \
    --features search,copycode,smoothscroll,scrollspy

What ships in the HTML

• Sticky-sidebar TOC (default; configurable via toc.behavior in design-system)
• Scrollspy: aria-current="location" on the TOC entry for the section in view
• Search bar (Esc clears): filters which H2 sections are visible
• Code-copy buttons on every <pre> (vanilla navigator.clipboard with execCommand fallback)
• Smooth-scroll on TOC link clicks
• Prism.js syntax highlighting (autoloader fetches only the languages this doc uses)
• 12 brand CSS custom properties from the design-system's derived_palette
• @media (prefers-reduced-motion: reduce) honored
• Print-friendly via the browser's native print stylesheet (no @page overrides needed for documents)

Hard rules

• Output is one .html file. No multi-file output, no extracted CSS/JS, no asset folders.
• External CDN: fonts.googleapis.com + cdn.jsdelivr.net (Prism). Nothing else.
• No JS framework runtime. Vanilla JS + IntersectionObserver only.
• Re-running on the same input writes doc-{slug}-2.html etc. (collision suffix).

Output

Returns: input lines, output path, design style applied, top 3 features used, one forcing question.

References

See markdown-html/skills/md-document/references/:

• information_density_patterns.md — Shihipar + Tufte + Wattenberger
• toc_and_nav_ux.md — NN/g + WCAG + ARIA
• single_file_html_discipline.md — Single-file artifact rationale