Tuesday, 6pm: sessions triple. Thursday, someone finally figures out it was a TikTok. By the next spike, nobody remembers which one.

Marks have annotated Tell timelines since day one — releases, incidents, news. Now they carry the actual thing that happened.

Paste a link, keep the story

Drop a URL into a mark and Tell fetches what it is.

A TikTok, a YouTube video or Short, a post on X — resolves to its title, author, and thumbnail, and the mark auto-categorizes as a post
A GitHub repo or release — pulls the release name and details, no token needed
Any other page — falls back to the page's own preview data, and a page with none becomes a clean bare link. Pasting never fails
Your own image — override the thumbnail with any image URL when the auto-fetched one isn't the story

See it on the charts

Marks draw directly on your line charts as color-coded vertical lines — release, incident, news, and post each in their own color, labeled, in light and dark theme.

The thumbnail comes along — link marks render with their preview, so the viral video sits on the spike it caused
Filter per chart — showing only incidents on the error chart and only posts on the signup chart takes one click
Edit in place — fix a title, nudge a timestamp, recategorize, or swap the link without recreating the mark

Fetched safely

The fetch runs on your server, so it's built like it.

It can't be pointed inward — every fetch is validated against private and reserved addresses, doesn't follow redirects, and carries size and time caps. A blocked fetch quietly degrades to a bare link
Rate-limited per user — a runaway script can't turn the preview endpoint into a crawler
Audited — every preview fetch lands in the audit log, including blocked ones

Everything from the original marks release still works — create from the CLI, your CI/CD, or plugins, filter by category, keep private drafts.