//Corresponding task from "add a link": {T277356}//
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When we first deploy "add an image", we want to deploy it with a controlled experiment, somewhat similarly to "add a link". Here are the details:
* With the advent of the images experiment, we want to end the link experiment.
** Ending the link experiment means making it so that all legacy accounts with Growth features and all future accounts with Growth features have this situation:
*** Replace the unstructured link task with the structured one. It will no longer be possible to do the unstructured one, though it can remain configurable in community configuration, in case a wiki wants to switch back.
*** If a wiki never had the unstructured link task because they had no applicable templates, then they should still get the structured one added.
*** Legacy users difficulty filter settings should not be changed, but new accounts should get the easy tasks by default ("copyedit" and "add a link").
** We could either choose a date to end the link experiment across all wikis, before we start the image experiment. Or we could end the link experiment as part of turning on the images experiment wiki by wiki. This can be up to engineers.
* For the image experiment, these are the groups that should be applied for account creations after the experiment starts:
** Group A: these users have "add an image" on as the only default task. Even though it's a medium task, we're doing this so that we can do intensive learning on this task (40% of accounts).
** Group B: these users have the default suggested edits experience without "add an image", so it would include copyedit and "add a link".
** Group C: usual control group that doesn't have Growth features at all.
* For accounts created before the experiment starts, "add an image" should be added as a new medium task type, but not selected by default. The users should just keep their existing difficulty settings.