In T247513#6000704, @ppelberg wrote:

In T247513#5999418, @matmarex wrote:

Particularly, I thought that it's possible we would display three at once (CAPTCHA, red error at the top, yellow anon warning underneath), but I tried it for a bit and that's actually not possible – you can't get an error message and the CAPTCHA at the same time. So maybe it's alright as it is?

@matmarex, assuming F31699571 is what people will end up seeing then, +1 to what you and @iamjessklein came to: the current treatment looks good to me for a first iteration with the follow caveats:

• 1. Are you able to deactivate the "Reply" button, as we've done in T246058, until after the person successfully completes the captcha? I wonder whether the current treatment will cause people to assume the captcha is optional and attempt to publish their comment without having completed it and become confused when they cannot.
• 2. Are you able to change the captcha error message to "To publish your comment, please enter the words that appear in the box below (more info):" When possible, I would like for us to adapt generic copy to the talk pages context so as to reinforce the distinction in peoples' minds between talk pages and content pages.

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@iamjessklein are you able to describe the refinements you and Bartosz discussed making in a future iteration in this ticket: T248594?

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EDIT: filed shell ticket for design refinements.

2. Configuring the message is non-trivial. Although we only use the distorted text mode on Wikimedia wikis, the captcha extension (called ConfirmEdit) actually provides multiple modes, for example MathCaptcha ("12+7 = ?"), so each mode can have a different message. Currently each mode only provides messages for creating or editing a page. One option is to add messages to ConfirmEdit for other types of contribution (reply/new topic) that are agnostic of the specific tool being used (e.g. they could be re-used by Flow).

In T248594#6093202, @Esanders wrote:

2. Configuring the message is non-trivial.

@Esanders able you to share a link to documentation where the cases in which people will be prompted to complete a CAPTCHA when using the Reply tool?

ConfirmEdit (thank you posting this) seems to describe how to implement CAPTCHAS, but not the scenarios in which people can experience them.

I ask the above in response to the feedback @Kaartic shared here:

When I try to post a reply after a few minutes, I got a request to complete CAPTCHA. The comment got posted after I completed the CAPTCHA but it's not clear why the CAPTCHA was necessary. It would be nice if the reason is mentioned somewhere.

In T248594#6233882, @ppelberg wrote:

able you to share a link to documentation where the cases in which people will be prompted to complete a CAPTCHA when using the Reply tool?

I think the following reason mentioned in T247513 applies in my case:

When a non-logged-in or new users makes an edit that adds new external links, they are required to fill in a captcha

I'm likely to be treated as a new user in enwiki beta instance and I did try posting external links. I'm not sure if I was shown a CAPTCHA only when trying to post an external link though. I'm also not sure in what other cases CAPTCHA would be shown.