Browsing a long thread - you sometimes forget who was the original topic starter - especially if you return to the topic days after last time you read it and jump into the discussion…
Therefore I request a solution that let you easily see who was the original Thread starter or topic starter…
Eg a icon or something that visualize who did original start this topic…
Update saw this: Make posts in a topic by topic starter recognizable
Might the post avatar already have a class attribute value indicating its a post made by the topic starter? If so a simple CSS declaration with the right selector could do something like add a border radius. It might be more trouble if the change took up too many more pixels of screen real estate. I think that anything that didn’t exceed what the flairs do should be OK.
What does the HTML for a post avatar of the OP look like in your dev tools inspect?
Yes, the CSS selector for this already exists in the markup, so you can style it as you see fit.