Reference/Markdown directives
Directives reference
Every directive the Clayo docs renderer supports, with attributes, allowed values, and a live example of each. For the fence and attribute rules, see Directive syntax.
| Directive | Purpose | Attributes |
|---|---|---|
callout | Highlighted aside | type: info, warning, tip, danger (default info) |
video | Embedded video player | src: video URL (required) |
align | Content alignment | value: left, center, right (default left) |
tabs / tab | Tabbed content | tab takes label |
accordion / item | Collapsible sections | item takes title |
Callout
A highlighted block for asides that deserve attention. The type attribute picks the tone: info (default), tip, warning, or danger.
:::callout{type="warning"}
Changing your subdomain breaks existing links immediately.
:::
The four types rendered:
Info: neutral context worth knowing.
Tip: a better way to do something.
Warning: proceed with care.
Danger: destructive and irreversible.
Video
Embeds a responsive video player. The src attribute is required and accepts YouTube, Loom, and Vimeo URLs in their common shapes:
- YouTube: watch URLs, youtu.be short links, embed URLs, and Shorts
- Loom: share and embed URLs
- Vimeo: video page and player URLs
:::video{src="https://www.loom.com/share/your-video-id"}
:::
Paste the URL straight from your browser's address bar; Clayo converts it to the right embed form at render time. A URL from an unsupported provider renders as a clearly labeled unsupported-video block rather than breaking the page. More context in Embed videos.
Align
Aligns its content left, center, or right. Most useful for centering an image or a short closing line.
:::align{value="center"}

:::
This line is centered.
Tabs
A container for content that varies by platform, language, or tool. tabs is the four-colon container; each three-colon tab takes a label.
::::tabs
:::tab{label="npm"}
npm install clayo
:::
:::tab{label="pnpm"}
pnpm add clayo
:::
::::
Rendered:
Run npm install clayo.
Run pnpm add clayo.
Keep labels short: one or two words. Tab content can hold anything markdown can, including code blocks and callouts.
Accordion
Collapsible sections, ideal for FAQs and optional detail that would otherwise bloat a page. accordion is the four-colon container; each item takes a title.
::::accordion
:::item{title="Can I export my content?"}
Yes. Every article is markdown, and your agent can read all of it.
:::
:::item{title="Is there a free plan?"}
Clayo is free to use. You bring your own OpenAI key for AI answers.
:::
::::
Rendered:
Yes. Every article is markdown, and your agent can read all of it.
Clayo is free to use. You bring your own OpenAI key for AI answers.
Related: image captions
Captions are not a directive, but they fit the same "richer than plain markdown" family. Give an image a title in quotes and it renders as a visible caption under the figure:

Details in Add images and captions.
Your agent can fetch this whole registry programmatically with the get_directives tool, so you can just ask for "a tabbed install section" and let it write valid syntax.
