Another topic worth to be discussed - 'View history':

User talk page will have different History pages due to opt-in/opt-out - because those are, in fact, different pages. Even the titles differ: Revision history of User talk:ET23 vs User talk:ET23 (after opt-in)

• it's confusing for a user to think about two different histories for the same page
• some History entires after opt-in are redundant and give no helpful info

• all info about a "related" Flow User talk will be stored in 'View logs for this page' on 'Revision history of User talk'

About the two histories: that's actually not much different from page moves, or wikitext cut-and-paste archives. I think this is actually more clear, because we're presenting these as two different pages.

I agree that Flow history pages need a lot more work, but that's a bigger problem than this ticket.

Yup, there is a log entry for the page itself, but it's not entirely clear in the history page.
E.g. I opted-in and then opted-out:
Log: http://en.wikipedia.beta.wmflabs.org/w/index.php?title=Special:Log&page=User+talk%3ATestingabanana
History: http://en.wikipedia.beta.wmflabs.org/w/index.php?title=User_talk:Testingabanana&action=history

We probably need to

• add a template to the un-archived wikitext page: http://en.wikipedia.beta.wmflabs.org/wiki/User_talk:Testingabanana
• add a template to the archived Flow page: http://en.wikipedia.beta.wmflabs.org/wiki/User_talk:Testingabanana/Flow_Archive_1
• tweak the edit summary the Flow talk page manager leaves, from Restore archived wikitext page to Archive flow page to <foo> and restore archived wikitext page

(Flow talk page manager moved page User talk:Testingabanana/Archive 1 to User talk:Testingabanana without leaving a redirect: Archive flow page to User talk:Testingabanana/Flow Archive 1 and restore archived wikitext page)

is 224, including the filled in variables.

I updated this ticket, and now it's just about adding the template. If we want to also change the edit summary for Flow talk page manager, that should be a different ticket. Do we want to do that?

Change 246858 had a related patch set uploaded (by Sbisson):
[WIP] Add templates to talkpage and Flow board during opt-out

https://gerrit.wikimedia.org/r/246858

Change 246858 merged by jenkins-bot:
Add templates to talkpage and Flow board during opt-out

https://gerrit.wikimedia.org/r/246858

Checked in betalabs

After opt-out

1. wikitext User talk page displays a link to archived Flow board:

e.g. Previous discussion was archived at User talk:ET12/Flow Archive 1 on 2015-10-28.

2. Archived User talk:ET12/Flow Archive 1 displays the following added to a Board description:

{{Archive for converted wikitext talk page|from=User talk:ET12|date=2015-10-28}}<br>
<br>
<br><br><br><br>
<!--?xml encoding="utf-8"?-->