eclipse-platform · HannesWell · Aug 29, 2026 · Aug 29, 2026 · Aug 29, 2026
diff --git a/development/plans/eclipse_project_plan_4_42.xml b/development/plans/eclipse_project_plan_4_42.xml
diff --git a/development/porting/eclipse_4_42_porting_guide.html b/development/porting/eclipse_4_42_porting_guide.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html lang="en">
+<head>
+<meta name="copyright" content="Copyright (c) IBM Corporation and others 2026. This page is made available under license. For full details see the LEGAL in the documentation book that contains this page." >
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<meta http-equiv="Content-Style-Type" content="text/css">
+<link rel="STYLESHEET" href="../book.css" charset="ISO-8859-1" type="text/css">
+<title>Eclipse 2026-12 (4.42) Plug-in Migration Guide</title>
+</head>
+
+<body>
+
+<h1>Eclipse 2026-12 (4.42) Plug-in Migration Guide</h1>
+<p>This guide covers migrating Eclipse 4.41 plug-ins to Eclipse 4.42.</p>
+<p>One of the goals of Eclipse 4.42 was to move Eclipse forward while remaining compatible 
+  with previous versions to the greatest extent possible. That is, plug-ins written 
+  against the Eclipse 4.41 APIs should continue to work in 4.42 in spite of any API changes.</p>
+<p>The key kinds of compatibility are API contract compatibility and binary compatibility. 
+  API contract compatibility means that valid use of 4.41 APIs remains valid for 
+  4.42, so there is no need to revisit working code. Binary compatibility means 
+  that the API method signatures, etc. did not change in ways that would cause 
+  existing compiled (&quot;binary&quot;) code to no longer link and run with the 
+  new 4.42 libraries.</p>
+<p>While every effort was made to avoid breakage, there are a few areas of incompatibility or new
+  APIs that should be adopted by clients. 
+  These documents describe those areas and provide instructions for migrating 4.41 plug-ins to 
+  4.42.</p>
+<ul>
+  <li><a href="https://help.eclipse.org/2026-12/topic/org.eclipse.platform.doc.isv/porting/eclipse_4_42_porting_guide.html?cp=2_3_1_0">
+        Eclipse Platform 2026-12 (4.42) Plug-in Migration Guide</a></li>
+  <li><a href="https://help.eclipse.org/2026-12/topic/org.eclipse.platform.doc.isv/porting/removals.html?cp=2_3_0">
+        Deprecated API removals in Eclipse Platform</a></li>
+  <li><a href="https://help.eclipse.org/2026-12/topic/org.eclipse.jdt.doc.isv/porting/eclipse_4_42_porting_guide.html?cp=3_2_0_0">
+        Eclipse JDT 2026-12 (4.42) Plug-in Migration Guide</a></li>
+</ul>
+
+</body>
+</html>
diff --git a/development/readme_eclipse_4.42.html b/development/readme_eclipse_4.42.html
diff --git a/news/4.42/acknowledgements.md b/news/4.42/acknowledgements.md
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+## Eclipse 2026-12 Acknowledgements
+
+We would also like to thank the users and adopters who support our efforts through a range of activities, including early testing, being a Friend of Eclipse, contracting special work, or outright employment.
+
+A special thanks goes to [Holger Voormann](https://github.com/howlger) for his Eclipse IDE promotion videos.
+
+Another special thanks to other Eclipse projects we build upon: EMF and ECF, who also provide timely updates so we can release on time.
+We also thank the other Eclipse projects that make up part of the infrastructure we depend on: Tycho, Orbit, EGit, EMF, and ECF for providing fixes and steady improvements.
+
+## Eclipse Platform
+
+The Platform team would like to thank everyone who has helped us improve quality by testing and reporting bugs and enhancement requests.
+Special thanks to all code contributors (alphabetically):
+<!-- START: eclipse-platform contributors -->
+<!-- END:   eclipse-platform contributors -->
+
+## Java Development Tools
+
+The JDT team thanks everyone who filed good enhancement requests, helped improve quality by testing and filing bug reports, and provided answers on JDT forums/newsgroups.
+Special thanks to all code contributors (alphabetically):
+<!-- START: eclipse-jdt contributors -->
+<!-- END:   eclipse-jdt contributors -->
+
+## Plug-in Development Environment
+
+The Plug-in Development Environment team thanks numerous contributors who continue to improve the component every release.
+Special thanks to all code contributors (alphabetically):
+<!-- START: eclipse-pde contributors -->
+<!-- END:   eclipse-pde contributors -->
+
+## Equinox
+
+The Equinox team thanks all contributors who helped improve the project by filing bug reports and enhancement requests.
+Special thanks to all code contributors (alphabetically):
+<!-- START: eclipse-equinox contributors -->
+<!-- END:   eclipse-equinox contributors -->
+
+## Eclipse Foundation
+
+The entire Eclipse Project team would like to thank the [Eclipse Foundation staff](https://www.eclipse.org/org/foundation/staff/) for their tireless efforts and especially
+[Frederic Gurr](https://github.com/fredg02), [Sébastien Heurtematte](https://github.com/heurtematte), and [Paweł Stankiewicz](https://github.com/pstankie) for not only keeping all that infrastructure going but also constantly improving it.
diff --git a/news/4.42/images/.gitkeep b/news/4.42/images/.gitkeep
diff --git a/news/4.42/index.html b/news/4.42/index.html
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+<!DOCTYPE html>
+<html>
+
+<head>
+	<script src="../../project.js"></script>
+</head>
+
+<body onload="redirect()"></body>
+
+</html>
diff --git a/news/4.42/index.md b/news/4.42/index.md
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+# Eclipse 4.42 - New and Noteworthy
+
+Welcome to the Eclipse SDK project!
+The Eclipse SDK project is part of the Eclipse 2026-12 simultaneous release.
+The Eclipse SDK and related resources can be downloaded from the [Eclipse Project downloads](https://download.eclipse.org/eclipse/downloads/) page.
+The Eclipse installer and other packages can be downloaded from the [IDE Downloads](https://www.eclipse.org/downloads/packages) page.
+
+Here are some of the more noteworthy items available in this release.
+
+- [New features in the Platform and Equinox](platform.md)
+- [New features for Java developers](jdt.md)
+- [New APIs in the Platform and Equinox](platform_isv.md)
+- [New features for plug-in developers](pde.md)
+
+A special thanks to [everyone who contributed](acknowledgements.md) to this Eclipse release!
diff --git a/news/4.42/jdt.html b/news/4.42/jdt.html
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+<!DOCTYPE html>
+<html>
+
+<head>
+	<script src="../../project.js"></script>
+</head>
+
+<body onload="redirect()"></body>
+
+</html>
diff --git a/news/4.42/jdt.md b/news/4.42/jdt.md
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+# Java Development Tools - 4.42
+
+A special thanks to everyone who [contributed to JDT](acknowledgements.md#java-development-tools) in this release!
+
+<!--
+---
+## Java&trade; XX Support 
+-->
+
+<!--
+---
+## JUnit
+-->
+
+<!--
+---
+## Java Editor
+-->
+
+<!--
+---
+## Java Views and Dialogs
+-->
+
+<!--
+---
+## Java Compiler
+-->
+
+<!--
+---
+## Java Formatter
+-->
+
+<!--
+---
+## Debug
+-->
+
+<!--
+### JDT Developers
+--> 
diff --git a/news/4.42/pde.html b/news/4.42/pde.html
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+<!DOCTYPE html>
+<html>
+
+<head>
+	<script src="../../project.js"></script>
+</head>
+
+<body onload="redirect()"></body>
+
+</html>
diff --git a/news/4.42/pde.md b/news/4.42/pde.md
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+# Plug-in Development Environment - 4.42
+
+A special thanks to everyone who [contributed to PDE](acknowledgements.md#plug-in-development-environment) in this release!
+
+<!--
+## Editors
+-->
+
+<!--
+## API Tools
+-->
+
+<!--
+---
+## PDE Compiler 
+-->
diff --git a/news/4.42/platform.html b/news/4.42/platform.html
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+<!DOCTYPE html>
+<html>
+
+<head>
+	<script src="../../project.js"></script>
+</head>
+
+<body onload="redirect()"></body>
+
+</html>
diff --git a/news/4.42/platform.md b/news/4.42/platform.md
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+# Platform and Equinox - 4.42 
+
+A special thanks to everyone who [contributed to Eclipse-Platform](acknowledgements.md#eclipse-platform) or [contributed to Equinox](acknowledgements.md#equinox) in this release!
+
+<!--
+---
+## Views, Dialogs and Toolbar
+-->
+
+<!--
+---
+## Text Editors
+-->
+
+<!--
+---
+## Preferences
+-->
+
+<!--
+---
+## Themes and Styling
+-->
+
+<!--
+---
+## Views, Dialogs and Toolbar
+-->
+
+<!--
+---
+## General Updates
+-->
diff --git a/news/4.42/platform_isv.html b/news/4.42/platform_isv.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+	<script src="../../project.js"></script>
+</head>
+
+<body onload="redirect()"></body>
+
+</html>
diff --git a/news/4.42/platform_isv.md b/news/4.42/platform_isv.md
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+# Platform and Equinox API - 4.42
+
+A special thanks to everyone who [contributed to Eclipse-Platform](acknowledgements.md#eclipse-platform) or [contributed to Equinox](acknowledgements.md#equinox) in this release!
+
+<!--
+---
+## Platform Changes
+-->
+
+<!--
+---
+## SWT Changes
+-->