--- schema: 1 runtime_version: "0.1.0" base_url: "https://cdn.pagelet.link/v1/" capabilities: [markdown, mermaid, math, code, charts, theme, toolbar, toc] status: alpha --- # Pagelet runtime — v1 capabilities (alpha) > Served alongside the runtime. To learn what it can do right now, fetch this file and follow it. This is the authoritative menu (D15); the installed skill only teaches the protocol. Each capability is **lazy-loaded** — only the modules a page uses are fetched. ## The tag ```html ``` Add it to any HTML. The ~12 KB loader scans the DOM, lazy-loads the needed modules, enhances in place, and removes the offline banner on success. Self-host by pointing the tag at your own copy; pin a version with `/v1.x.y/`. ## markdown — *stable* `` → rendered (marked + sanitised) into `.pagelet-prose`. Source retained (hidden) for round-trip export. Indentation is auto-stripped. Fenced ` ```mermaid ` blocks become diagrams; ` ```lang ` blocks get highlighting; `$$…$$` / `\(…\)` / `\[…\]` get math. ## mermaid — *stable* A ` ```mermaid ` fenced block (inside markdown) or `
…
` → an SVG diagram with **pan / zoom / fullscreen**. ## math — *stable* KaTeX over the prose. Delimiters: `$$…$$` and `\[…\]` (display), `\(…\)` (inline). `$…$` inline is **off** by default (currency). Fonts load from a pinned CDN. ## code — *stable* ` ```lang ` fenced blocks (or `
`) → syntax highlighting + a copy button. Theme-aware.

## charts — *stable*

`` → a responsive ``, themed to the page.

## theme — *stable*

`` → compiled to `:root` / `[data-theme="dark"]` with shadcn variable names. `` forces dark.

## toolbar & toc — *stable*

Auto-mounted: a floating toolbar (theme toggle, print/PDF, PNG export, copy-as-Markdown round-trip), a scroll-progress bar, and — for documents with ≥3 headings — a sticky table of contents with scroll-spy. Disable the toolbar with ``.

## offline banner

Include this so a no-network open degrades gracefully; the runtime removes it on boot:

```html

⏳ This pagelet needs an internet connection to render its interactive parts.

```

## Coming next

Cloud publish (short `pagelet.link` URLs), cloud PDF, accounts, and private artifacts — feature-detected, so they light up here when shipped with no reinstall.