Expose structured gameplay build diagnostics

include/faset/editor/build_diagnostics.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <faset/core/json.hpp>
+#include <filesystem>
+#include <string_view>
+
+namespace faset::editor {
+
+// Parse compiler, MSVC/clang-cl and Lua output into bounded Editor-facing rows.
+// Only sources under the current project's Scripts directory receive a file
+// key, so clients cannot offer navigation to unrelated filesystem paths.
+Json parse_build_diagnostics(std::string_view raw_log, std::string_view phase,
+                             const std::filesystem::path& project_root);
+
+} // namespace faset::editor