Rich chat replies

The Shmastra widget renders markdown and iframes. That means an agent can return a link to a generated HTML file and the chat will show the live page inline — charts, dashboards, landing pages, even little interactive demos.

Example prompts

When I ask for a chart, generate an HTML file with Chart.js and show it inline.

Visualise this data as a bar chart.

Draft a one-page landing page for this product idea.

Turn these numbers into a pie chart I can screenshot.

What happens

The agent uses a small tool the widget provides: it writes an HTML file into files/, then replies with a markdown link whose target is an HTML file. The widget recognises the content type and renders the page in an iframe inside the message bubble.

When to use this vs a full web app

Use rich replies when	Use a web app when
It's a one-off visual.	You want a standalone surface you'll open again later.
You want it in the conversation.	You want it embeddable in other sites.
No backend logic needed.	You want custom routes, forms, auth.

Tips

• Charts. Ask for Chart.js specifically — it's small, well-known, and works in a plain HTML file with a CDN script tag.
• Screenshots. The headless browser can open a generated page and save a PNG; return both the PNG and the live HTML if you want printable assets too.
• Long-lived links. Files under files/ stay on disk until you remove them — but the public URL is scoped to the running dev server. For real sharing, publish to a proper host.