# Upcoming topic-list changes - how to prepare themes and plugins

**URL:** https://meta.discourse.org/t/upcoming-topic-list-changes-how-to-prepare-themes-and-plugins/343404
**Category:** Development
**Tags:** dev-news
**Created:** [December 19, 2024, 5:43pm UTC](https://meta.discourse.org/t/upcoming-topic-list-changes-how-to-prepare-themes-and-plugins/343404 "2024-12-19T17:43:05Z")
**Posts on this page:** 1
**Showing post:** 29

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### Author: ![merefield](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/merefield/32/176214_2.png) [@merefield](https://meta.discourse.org/u/merefield)
#### Post date: [February 12, 2025, 10:21am UTC](https://meta.discourse.org/t/upcoming-topic-list-changes-how-to-prepare-themes-and-plugins/343404/29 "2025-02-12T10:21:34Z")

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David, not sure if you prefer this Topic or the other, but here goes:

My new compliant (I think) component is failing when Enable Glimmer Topic List is set to Auto …

> [@Topic List Previews (TLP)](https://meta.discourse.org/t/topic-list-previews-theme-component/209973/542):
>
> It is on auto flushed_face I’ll change it. edit o damn — it was that. So auto, that includes enabled, is not same as enabled. Is there some mechanism that need explicity tell glimmer is ok, unless it falls back to old system?

It suggests the new API is not being activated on Auto … is there something I need to do to sign-post the Theme Component so Discourse uses the new Glimmer API when on Auto?

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