Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.293,
Internal ChangesSection of the release
What
An @-mention is when you type @ to point Claude at an agent or an MCP resource, which is something provided by an outside service. Claude Code used to send a usage report for every such mention, whether it worked or failed. It now reports only the first several mentions in a message one by one. Any beyond that are rolled into a single report with a count.
Why
The amount of usage reporting from one message now has a ceiling, however many @-mentions it contains.
