Step 648: phase 39a integration

editor/src/Phase39aIntegration.h

@@ -0,0 +1,49 @@
+#pragma once
+// Step 648: Phase 39a integration
+
+#include "InEditorTestRunnerModel.h"
+#include "ProjectAstCMakeGenerator.h"
+#include "SelfHostingProjectConfig.h"
+#include "SelfModificationSafetyGuard.h"
+
+struct Phase39aIntegrationResult {
+    bool configLoaded = false;
+    bool cmakeGenerated = false;
+    bool testRunTriggered = false;
+    bool testRunComplete = false;
+    bool mutationBlocked = false;
+    bool safetyReasonPresent = false;
+    bool selfHostingReady = false;
+    bool integrationReady = false;
+};
+
+class Phase39aIntegration {
+public:
+    static Phase39aIntegrationResult run() {
+        Phase39aIntegrationResult out;
+
+        SelfHostingProjectConfig cfg{"whetstone_DSL", "/workspace", {"editor/src"}, {"step648_test"}, true};
+        auto j = SelfHostingProjectConfigModel::toJson(cfg);
+        SelfHostingProjectConfig parsed;
+        std::string err;
+        out.configLoaded = SelfHostingProjectConfigModel::fromJson(j, &parsed, &err);
+        out.selfHostingReady = SelfHostingProjectConfigModel::canSelfHost(parsed);
+
+        ProjectAstDescription ast{"whetstone_editor", {"src/main.cpp"}, {"step648_test"}, {"nlohmann_json"}, true};
+        std::string cmake = ProjectAstCMakeGenerator::generate(ast);
+        out.cmakeGenerated = cmake.find("add_executable(whetstone_editor") != std::string::npos;
+
+        auto testSummary = InEditorTestRunnerModel::run({"step648_test"});
+        out.testRunTriggered = !testSummary.items.empty();
+        out.testRunComplete = testSummary.complete;
+
+        std::string reason;
+        out.mutationBlocked = !SelfModificationSafetyGuard::allowMutation("editor/src/main.cpp", {"editor/src"}, &reason);
+        out.safetyReasonPresent = !reason.empty();
+
+        out.integrationReady = out.configLoaded && out.cmakeGenerated && out.testRunTriggered &&
+                               out.testRunComplete && out.mutationBlocked && out.safetyReasonPresent &&
+                               out.selfHostingReady;
+        return out;
+    }
+};