/api/v1/recipes/{id}/comments/seen

The recipe page calls this when the reader first opens its comments tab, with the highest comment id it loaded. Comments above it stay new. The editor, cook mode and MCP reads do not call it. It needs only recipes:read on purpose: it moves the caller's own unread marker and changes nothing anybody else sees, so a read-only client that shows comments can clear them.

curl -X PUT "https://example.com/api/v1/recipes/string/comments/seen" \  -H "Content-Type: application/json" \  -d '{    "upTo": 0  }'