CLion’s Classic Engine Unbundled: What’s Next - The JetBrains Blog

CLion has advanced its transition to the Nova engine as the default for C and C++ development, with the Classic engine now available only as an optional plugin in the CLion 2026.2 release. Users who have already made the switch to Nova need not take any action, while those still relying on the Classic engine can access it via the C/C++ Language Support plugin from the JetBrains Marketplace. The transition timeline indicates that the last stable release of the Classic engine will be compatible with CLion 2026.3 in November 2026, with updates ceasing afterward. Users needing assistance transitioning to Nova can reach out to their customer success engineer, account manager, or use the enterprise customer contact form for support.

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