T243621 introduced a query string parameter that makes it possible for volunteers to try new [Talk pages project]() features on live talk pages prior to said "features" being made available within the Discussion tools beta feature.
This task is about making it possible for people using the ?dtenable=1 URL parameter try topic subscriptions (T263820) on any Wikimedia wiki.
- People who append `?dtenable=1 to the URL of any page where the Reply Tool is already available, will:
- 1) See [ subscribe ] affordances next to any ==H2== sections that appear on said page
- 2) Be able to click the [ subscribe ] affordance(s) mentioned in "1)"
- 3) Receive notification(s) when new comment(s) are posted in section to which they have subscribed
- 4) Be able to unsubscribe from conversations to which they have previously subscribed
- ===Requirements are met