v0.2.0 — Cross-platform

Added

• Cross-platform support (Windows / Linux / macOS) via VCK::Window + VCKCrossplatform facade over GLFW. VCK_PLATFORM_WINDOWS/LINUX/MACOS macros gate platform includes.
• example/build.sh — Linux + macOS builder with the same [1]-[9] / [A] / [0] menu as build.bat; auto-detects OS, uses pkg-config for Vulkan + GLFW.
• Live resize as first-class — VCK::HandleLiveResize(window, dev, sc, fb, pipe[, depth]) handles any OS resize (720p ↔ 4K) in one call per frame. Timeline-aware overloads in layers/execution/ emit a DebugTimeline CPU span (rule 12).
• Anti-aliasing framework — VCK::AATechnique enum (Auto, Off, MSAA, MSAA_A2C, SampleRate, FXAA, SMAA_1x, SMAA_T2x, TAA, TAAU). cfg.aa.technique = AATechnique::Auto runs a 5-step decision tree at VulkanSwapchain::Initialize. Sample-based techniques implemented pipeline-side; post-process names returned via swapchain.GetAATechnique() for renderer to implement (rules 15/16).
• VCK::VCKLog structured logger — Info (debug-gated) / Notice / Warn / Error. Console-spam dedup of identical consecutive (tag, body) lines. Classify helper parses legacy LogVk("[Tag] body") into the new levels.
• cfg.debug flag (default false) — VulkanContext::Initialize wires it into VCKLog::SetDebug().
• cfg.pipeline.alphaToCoverage — flips alphaToCoverageEnable in pipeline multisample state.
• cfg.pipeline.sampleRateShading + minSampleShading — enables per-sample shading.
• Repo reorganisation: layers/{core,expansion,execution,vmm}/ + vendor/{vulkan_headers,glfw,vma}/. VCK.h at root is the single source of truth for API documentation.
• Wiki — Hello-VCK.md (per-line walkthrough targeting 1-hour onboarding budget), _Sidebar.md (navigation).
• LICENSE, CHANGELOG.md, CONTRIBUTING.md, .editorconfig, .gitignore at repo root.

Changed

• VK_CHECK now routes failures directly to VCKLog::Error(…) instead of the debug-gated LogVk(…) — fail loud regardless of cfg.debug (rule 14 fix).
• VulkanContext::Initialize takes VCK::Window& (was HWND on Windows only); raw-handle overload preserved as escape hatch (rule 9).
• <windows.h> / <vulkan_win32.h> guarded behind VCK_PLATFORM_WINDOWS in VulkanHelpers.h and VCK.h — no more platform leakage in the public surface.
• docs/Design.md rule 4 allow-list updated to include VulkanSwapchain::Recreate and HandleLiveResize vkDeviceWaitIdle calls.
• Examples 1-9 ported to VCK::Window + VCK::HandleLiveResize — dropped raw GLFWwindow*, HWND, g_Resized, g_Minimized, OnFramebufferResize.

Removed

• core/VulkanHelpers.cpp (empty shell).
• core/ at repo root (moved to layers/core/).
• VMM/ at repo root (moved to layers/vmm/).
• BuildRequiredExtensions helper in VulkanContext.cpp (dead code from pre-crossplatform era, no matching header decl).