Missing Notable Changes in 2026.1?

IntelliJ Platform
1

We’re told in “Keeping Plugins Compatible” to keep up to date with notable changes / breaking changes.

I can’t see 2026.x on either of the docs post (I can only post 2 links..):

`https://plugins.jetbrains.com/docs/intellij/``

  • /api-notable.html
  • /api-changes-list.html

There also isn’t tag/sources posted for the latest EAPs (https://github.com/JetBrains/intellij-community/tags) - this is painful, we have these tags for example for IDEA:

idea/2025.3-eap-1
idea/2025.3-eap-2
idea/2025.3-eap-3
idea/2025.3-eap-4
idea/2025.3-eap-5
idea/2025.3-eap-6
idea/2025.3-eap-7
idea/2025.3-eap-8
idea/2026.1-eap-1

Is this no longer going to be provided? It’s the best way to get sources at the specific EAP version, correct?

2

Tags are not published only temporary due to our ongoing infrastructure migration and we have no breaking changes in public APIs in 2026.1 EAP yet

3 Likes
3

Branch should be okay, right? e.g 261.19799?

(Thanks for replying on a weekend as well :heart_hands: )

4

no breaking changes in public APIs in 2026.1 EAP yet

We’ve seem to have found breaking changes in 2026.x/261/ (seems to be in 261.19799) in the intellij-elixir plugin (https://github.com/KronicDeth/intellij-elixir) plugin.

In platform/core-api/src/com/intellij/openapi/editor/FoldingGroup.java - intellij-community/platform/core-api/src/com/intellij/openapi/editor/FoldingGroup.java at 261.19799 · JetBrains/intellij-community · GitHub), this commit: cleanup foldings (part of IJPL-222955) · JetBrains/intellij-community@42ebb49 · GitHub made changes to newGroup - cleanup foldings (part of IJPL-222955) · JetBrains/intellij-community@42ebb49 · GitHub

, which seems to be a breaking change?

We’re getting a test failure here - Add support for 2026.1 EAP, 2025.3.2 version bumps · KronicDeth/intellij-elixir@3786bcd · GitHub) for it:

e: file:///home/runner/work/intellij-elixir/intellij-elixir/src/org/elixir_lang/folding/Builder.kt:260:75 Argument type mismatch: actual type is 'String?', but 'String' was expected.

Code: /src/org/elixir_lang/folding/Builder.kt#L257-L261 intellij-elixir/src/org/elixir_lang/folding/Builder.kt at 7cc76757e6e496dc220e9f50c1a9aec30c7c5952 · joshuataylor/intellij-elixir · GitHub

                                            val moduleAttributeName = atNonNumericOperation.moduleAttributeName()
                                            val foldingGroup =
                                                foldingGroupByModuleAttributeName.computeIfAbsent(moduleAttributeName) { debugName: String? ->
                                                    FoldingGroup.newGroup(debugName)
                                                }
                                            foldingDescriptorList.add(

(Again, as a new member I can’t post links, sorry for the weird link formatting, as I can’t post markdown links).

5

This commit adds @NotNull for result and parameter which is only source-incompatible with Kotlin code that passes null there, while fully binary-compatible and will not break existing plugin versions.

grafik
grafik1408×136 19.4 KB

Incompatible API Changes in the documentation is the last resort for us when we cannot avoid breaking binary compatibility.

6

While we are writing down more Notable API changes one can now track API changes of the platform in YouTrack: https://youtrack.jetbrains.com/issues?q=tag:%20ij-api%20project:%20IJPL