CHANGELOG 0.2.2.md — Notepad

Added

• A new subsystems/ tree with subsystems/posix as the OS's first explicit subsystem, separating kernel, userland and sdk under a single ownership.

Changed

• The POSIX syscall entry and dispatcher move under subsystems/posix/kernel, while kernel/ keeps the scheduler, base processes, VM, VFS, drivers and the other generic mechanisms.
• The canonical SDK v1 moves to subsystems/posix/sdk/v1; the main build, tools/build-user.ps1 and the VS Code extension now consume that path as the POSIX subsystem's public reference.
• The internal userland moves to subsystems/posix/userland and builds against the SDK's shared canonical runtime, removing internal duplicates and leaving top-level sdk/ as the root for examples and ports.
• The public definition of the visible ABI is unified in subsystems/posix/sdk/v1/include/savanxp/syscall.h, with no parallel copy in include/shared.
• The system reports itself as v0.2.2 in the kernel, the shell, uname, sysinfo and the components consuming the shared version.
• The migration re-validates the persistent image flow: .\sdk\doomgeneric\build.ps1 and .\build.ps1 build still keep doomgeneric and doom1.wad in build/disk.img without recreating the image under normal operation.