Add .claude/ config (settings, graft statusline and hooks helpers,
graft skill), .mcp.json and opencode.json MCP server entries, and
AGENTS.md with graft usage instructions. Add .ignore to re-admit
graft/ to ripgrep search while excluding its cache. Add /graft/ to
.gitignore since the graph is regenerable.
Split CMakeLists.txt into cmake/Plugin.cmake (production formats and
MinGW link flags) and cmake/Harness.cmake (console test harness with
CTest registration). Add SERUMALT_BUILD_PLUGIN and SERUMALT_BUILD_TESTS
options so production and harness builds are mutually exclusive and
each omits the other's targets.
Add build_linux.sh, build_macos.sh, and build_harness.sh with host
validation, env-overridable build dirs, and explicit option flags.
Rewrite build_windows.sh to use the checked-in mingw64-toolchain.cmake
instead of regenerating it, validate all required tools, and stage
with cmake -E copy_directory.
Broaden .gitignore to cover all build_*/ directories.
biggy