Greetings! 

After several months of development, I'm pleased to announce the immediate availability of Redcore Linux Hardened 2601 (codename Vulpecula) stable ISO. We strongly believe in consistency; therefore, while the distribution functions and looks the same on the surface, this cycle introduces extensive architectural improvements under the hood.

Note: The branch streamlining announced in January is now fully integrated into this release.

Changelog 

• Tree Resync: Fully synced with the Gentoo Linux testing tree as of 19.04.2026.
• Kernel: Linux kernel v6.19.13 is now the default. For those requiring older versions, v6.18, v6.15, v6.12, v6.6, v6.1, and v5.15 LTS remain available in the repositories.
• Toolchain: Updated to glibc v2.42, gcc v15.2.1, binutils v2.42, clang/llvm v21, and rust v1.93.1.
• Graphics: Features the latest Mesa, Xorg, XWayland, and Wayland implementation.
• Multimedia: FFmpeg v8 is now the default, replacing older versions.
• Desktop: While Gentoo has removed native Qt5 application integration from KDE Plasma 6, we have implemented a qt5ct-based integration by default to maintain UI consistency.

Sisyphus Improvements: 

New Feature - Superpose: Streamlines the installation of out-of-tree packages from 3rd party repositories.

Warning: Please use this feature responsibly. Installing 3rd-party packages can lead to system instability or breakage.

Usage example:

eselect repository enable librewolf

eselect repository enable another-brave-overlay

sisyphus superpose

sisyphus install librewolf-bin brave-browser --ebuild

A full list of over 400 available repositories can be viewed via:

eselect repository list

Under the Hood: The backend has been completely ported to Python, removing all legacy bash helper code. This results in significantly faster and more reliable database transactions.

Metadata: Package subslots are now visible in the database, bringing parity with Gentoo's metadata handling.

Security: Added GPG portage tree signature verification to ensure the integrity and authenticity of every tree sync.

First-run/Recovery Wizard: A new first-run/recovery wizard can reinstate system branches (such as the portage tree) if they are accidentally deleted.

Automation: Introduced the --ask/--no-ask flags to toggle manual confirmation for install, upgrade, remove, and cleanup operations (default --ask for backwards compatibility).

Parallel Searching: Sisyphus now supports multiple simultaneous binary searches with advanced filtering.

News Delivery: A built-in news system now delivers critical change alerts directly through the package manager, without the need of reading blogposts.

UI Enhancements: Implemented columnisation for package lists to improve readability during operations.

Known Issues 

Virtualization: Hardware acceleration must be enabled in virtual machine environments for the live session to function properly.

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