v11.9.0 Changelog by changelog-automation-docs[bot] · Pull Request #9053 · mattermost/docs

changelog-automation-docs · 2026-06-17T10:44:39Z

Auto-generated changelog for milestone v11.9.0 from mattermost/mattermost,mattermost/enterprise.

mattermost-build · 2026-06-17T10:44:43Z

Hello @changelog-automation-docs[bot],

Thanks for your pull request! A Core Committer will review your pull request soon. For code contributions, you can learn more about the review process here.

github-actions · 2026-06-17T10:48:13Z

Newest code from mattermost has been published to preview environment for Git SHA 7453853

github-actions · 2026-06-17T11:03:10Z

Newest code from mattermost has been published to preview environment for Git SHA 7453853

github-actions · 2026-06-17T11:08:19Z

Newest code from mattermost has been published to preview environment for Git SHA 7e16f14

github-actions · 2026-06-17T11:53:24Z

Newest code from mattermost has been published to preview environment for Git SHA 7a1f4c2

github-actions · 2026-06-17T12:04:12Z

Newest code from mattermost has been published to preview environment for Git SHA f892e7d

github-actions · 2026-06-17T12:06:55Z

Newest code from mattermost has been published to preview environment for Git SHA 7dacdc6

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Newest code from mattermost has been published to preview environment for Git SHA 974d613

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github-actions · 2026-06-23T06:37:18Z

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github-actions · 2026-06-23T07:35:24Z

Newest code from mattermost has been published to preview environment for Git SHA fe4b53b

hanzei

Thanks Amy!

github-actions · 2026-06-23T08:18:13Z

Newest code from mattermost has been published to preview environment for Git SHA 3c57475

agarciamontoro

Just one suggestion in the Azure Blob Storage support feature

github-actions · 2026-06-23T09:07:41Z

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github-actions · 2026-06-23T09:11:11Z

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github-actions · 2026-06-23T09:52:56Z

Newest code from mattermost has been published to preview environment for Git SHA e540e9e

agarciamontoro

Thank you!

cpoile · 2026-06-23T18:53:55Z

+  - Threads started by a webhook are no longer highlighted for the user who owns the webhook.
+  - Added user setting "Auto-follow threads on channel-wide mentions" (Settings → Notifications). When disabled, @channel/@all/@here mentions no longer force thread membership; users still receive mention notifications but must manually follow the thread.
+  - Added a webapp hook ``registerChannelTypeOption``.
+  - Added a ``MessagesWillBeConsumedWithContext`` plugin hook.


These two should be be in the Plugins/Integrations section below

cpoile · 2026-06-23T18:59:56Z

+  - Plugin registry's ``registerRightHandSidebarComponent`` now accepts an optional ``showPopout`` boolean (default ``true``) to hide the "Open in new window" button from the plugin right-hand side header.
+


Can we add:

Suggested change

- Plugin registry's ``registerRightHandSidebarComponent`` now accepts an optional ``showPopout`` boolean (default ``true``) to hide the "Open in new window" button from the plugin right-hand side header.

- Added a ``ChannelWillBeUpdated`` plugin hook.

- Added a ``ChannelWillBeRestored`` plugin hook.

- Added a ``ScheduledPostWillBeCreated`` plugin hook.

- Added a ``DraftWillBeUpserted`` plugin hook.

- Added a webapp hook ``registerChannelIconOverride``.

- Added a webapp hook ``registerChannelComposerBannerComponent``.

- Added a webapp hook ``registerPostHeaderComponent``.

- Added a webapp hook ``registerComposerPlaceholder``.

- Added a webapp hook ``registerProductSwitcherMenuItem``.

docs: add changelog for v11.9.0

7453853

mattermost-build added the Contributor label Jun 17, 2026

amyblais added this to the v11.9.0 milestone Jun 17, 2026

amyblais added the Work In Progress Not yet ready for review label Jun 17, 2026

amyblais self-assigned this Jun 17, 2026

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amyblais added 2 commits June 17, 2026 15:00

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amyblais added 2 commits June 18, 2026 16:38

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Merge branch 'master' into changelog/v11.9.0

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amyblais changed the base branch from master to v11.9-documentation June 18, 2026 13:38

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davidkrauser approved these changes Jun 22, 2026

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amyblais added 3 commits June 23, 2026 09:33

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amyblais requested a review from hanzei June 23, 2026 08:15

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agarciamontoro approved these changes Jun 23, 2026

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cpoile requested changes Jun 23, 2026

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		- Plugin registry's ``registerRightHandSidebarComponent`` now accepts an optional ``showPopout`` boolean (default ``true``) to hide the "Open in new window" button from the plugin right-hand side header.

-  - Plugin registry's ``registerRightHandSidebarComponent`` now accepts an optional ``showPopout`` boolean (default ``true``) to hide the "Open in new window" button from the plugin right-hand side header.
+  - Added a ``ChannelWillBeUpdated`` plugin hook.
+  - Added a ``ChannelWillBeRestored`` plugin hook.
+  - Added a ``ScheduledPostWillBeCreated`` plugin hook.
+  - Added a ``DraftWillBeUpserted`` plugin hook.
+  - Added a webapp hook ``registerChannelIconOverride``.
+  - Added a webapp hook ``registerChannelComposerBannerComponent``.
+  - Added a webapp hook ``registerPostHeaderComponent``.
+  - Added a webapp hook ``registerComposerPlaceholder``.
+  - Added a webapp hook ``registerProductSwitcherMenuItem``.

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