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JetbrainsVaclav PechAnnouncement
MPS 2026.2 Release Candidate Available
Summary
JetBrains has released the MPS 2026.2 Release Candidate, a language workbench for creating domain-specific languages, with several key improvements over the previous EAP1 build. The RC adds Linux ARM64 support with a bundled JetBrains Java Runtime and the ability to build standalone MPS-based applications for that architecture. Build Language now supports importing files from TAR archives, preserving symbolic links and file permissions, which is useful for packaging platform-specific plugins and native libraries. The Projectional Agent Toolkit receives a major performance boost with token usage reductions exceeding 50% in tests using Claude Code, plus new MCP tools for typesystem debugging, intentions, and quick-fixes. Archive packaging preserves symbolic links and uses .tar.gz for macOS to avoid duplicate native libraries, while the Import dialog now respects user selections and the Diff dialog has visual improvements.
Context
JetBrains MPS is a language workbench for creating domain-specific languages. This release candidate follows the EAP1 build and includes new features and bug fixes.
Takeaways
MPS 2026.2 RC adds Linux ARM64 support with a bundled JetBrains Java Runtime and the ability to build standalone MPS-based applications for that architecture.
The Projectional Agent Toolkit’s MCP API has been reworked to reduce token usage by over 50% in tests, with new tools for typesystem operations, intentions, quick-fixes, and log reading.
Archive packaging now preserves symbolic links and uses .tar.gz for macOS distributions to avoid duplicate copies of native libraries.
FAQ
What new platform support does MPS 2026.2 RC add?
It adds Linux ARM64 support, including a bundled JetBrains Java Runtime and the ability to build standalone MPS-based applications (RCPs) for that architecture.
How does the Projectional Agent Toolkit performance improve?
Token usage on common tasks like DSL modeling is reduced by over 50% in tests using Claude Code, due to a rework of the MPS MCP API with consistent parameter naming, bulk operations, and one-shot model validation.
What changes were made to archive packaging?
MPS 2026.2 preserves symbolic links and file permissions when packaging platform-specific plugins, and macOS archive distributions now use .tar.gz instead of .zip to preserve symbolic links.
Source and freshness
- Source
- blog.jetbrains.com
- Published
- Added to Yomu
Summaries are generated from the original by a language model. Check the original before relying on it.
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