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TINYDOC-3570 - TinyMCE 8.9 Release Documentation and Community Changelog - #4305

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TINYDOC-3570 - TinyMCE 8.9 Release Documentation and Community Changelog#4305
kemister85 wants to merge 20 commits into
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@kemister85 kemister85 commented Aug 11, 2026

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Ticket: TINYDOC-3570

Site: Staging branch

Changes:

  • {productname} 8.9.0 Release documentation and community changelog.

This branch is the release container for {productname} 8.9.0. Individual release-content tickets are merged into it ahead of the release, and it merges to release/8.9.

Pre-checks:

  • Branch is correctly prefixed: feature/8.9/TINYDOC-3570
  • modules/ROOT/nav.adoc has been updated (if applicable).
  • Files have been included where required (if applicable).
  • Major or minor version changes have updated the supported-versions.adoc table.
  • Build passes without console errors, warnings, or issues.

Review:

  • Documentation Team Lead has reviewed.

@kemister85 kemister85 added this to the TinyMCE 8.9.0 milestone Aug 11, 2026
@kemister85 kemister85 added the upcoming release Documentation for features currently under development/QA label Aug 11, 2026
kemister85 and others added 17 commits August 26, 2026 10:43
…e default sources for chat conversations. (#4318)

* TINYDOC-3570 - Add the tinymceai_chat_default_sources option and its 8.9.0 release note

Documents the new TinyMCE AI chat option and adds the accompanying release
note entry for the 8.9.0 release.

Covers TINYDOC-3561 (option reference section) and TINYMCE-14703.

* TINYDOC-3570: The tinymceai_chat_fetch_sources option can now nominate default sources for chat conversations.

* Update modules/ROOT/partials/configuration/tinymceai_options.adoc

Co-authored-by: tiny-ben-tran <ben.tran@tiny.cloud>

* Update modules/ROOT/pages/8.9.0-release-notes.adoc

Co-authored-by: tiny-ben-tran <ben.tran@tiny.cloud>

* Update modules/ROOT/pages/8.9.0-release-notes.adoc

Co-authored-by: tiny-ben-tran <ben.tran@tiny.cloud>

* Update modules/ROOT/pages/8.9.0-release-notes.adoc

Co-authored-by: tiny-ben-tran <ben.tran@tiny.cloud>

* TINYDOC-3570: Align the option reference with the menu array structure.

* TINYDOC-3570: Fix template literal interpolation in the TinyMCE AI examples.

* TINYDOC-3570: Fix broken literal syntax issue causing rendering issues.

---------

Co-authored-by: tiny-ben-tran <ben.tran@tiny.cloud>
…ntation" instead of adding alt text when updated (#4313)
* Docs: TINYMCE-14506 - Tooltips could not be closed using `Esc`

* TINYDOC-3570: Remove the tooltip focus behavior sentence pending TINYMCE-14659.
…p comment highlights visible while the sidebar is closed. (#4308)

* Docs: TINYMCE-14726 - New option `tinycomments_always_show_highlights` to keep comment highlights visible while the sidebar is closed

* Docs: TINYMCE-14726 - Align user_id example value with the embedded mode setup example

* Docs: TINYMCE-14726 - Match the Comments option examples in the tinycomments_always_show_highlights example
…s the AI context limit (#4314)

* Docs: TINYMCE-13661 - Improved error message shown when a chat message exceeds the AI context limit

* Update modules/ROOT/pages/8.9.0-release-notes.adoc

Co-authored-by: Hamza Benkhaldoun <hamza0867@gmail.com>

---------

Co-authored-by: Hamza Benkhaldoun <hamza0867@gmail.com>
* Docs: TINYDOC-3570 - New options for configuring the width of resizable sidebars

* Docs: TINYMCE-14678 - Custom sidebars opt in to resizing with the new resizable property

Also covers TINYMCE-14527 (resize behaviour), TINYMCE-14683 (premium sidebars
resizable by default) and TINYMCE-14554 (persisting the sidebar width).

* Docs: TINYMCE-14529 - Add SidebarResizeStart and SidebarResized events

* Docs: TINYMCE-14527 - Sidebars can now be resized by dragging their edge

Adds release note entries for TINYMCE-14527, TINYMCE-14529, TINYMCE-14530,
TINYMCE-14678 and TINYMCE-14683 to the 8.9.0 release notes.

* Docs: TINYMCE-14678 - Use a version admonition for resizable sidebar availability

Adds the 8.9 requires-version admonition partial and links api.element() to
the sidebar API object reference.

* Docs: TINYMCE-14678 - Show the resizable property in the custom sidebar examples

* Docs: TINYMCE-14683 - Note the Comments sidebar width change and the floating AI sidebar exception
@kemister85
kemister85 marked this pull request as ready for review August 26, 2026 22:52
@kemister85
kemister85 requested review from a team and soritaheng as code owners August 26, 2026 22:52
== Overview

{productname} {release-version} was released for {enterpriseversion} and {cloudname} on <weekday>, <month> <DD>^<st|nd|rd|th>^, <YYYY>. These release notes provide an overview of the changes for {productname} {release-version}, including:
{productname} {release-version} was released for {enterpriseversion} and {cloudname} on Wednesday, August 27^th^, 2026. These release notes provide an overview of the changes for {productname} {release-version}, including:

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{productname} {release-version} was released for {enterpriseversion} and {cloudname} on Wednesday, August 27^th^, 2026. These release notes provide an overview of the changes for {productname} {release-version}, including:
{productname} {release-version} was released for {enterpriseversion} and {cloudname} on Thursday, August 27^th^, 2026. These release notes provide an overview of the changes for {productname} {release-version}, including:

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