Step 540: add Python/TypeScript constructive edit adapter

editor/src/PythonTypeScriptConstructiveEditAdapter.h

@@ -0,0 +1,84 @@
+#pragma once
+// Step 540: Python/TypeScript Constructive Edit Adapter
+
+#include <set>
+#include <string>
+#include <vector>
+
+struct PyTsConstructiveEditRequest {
+    std::string language;      // python/typescript
+    std::string constructKind; // function/class/import/signature/module_stmt
+    std::string operation;
+    bool moduleSideEffectRisk = false;
+};
+
+struct PyTsConstructiveEditResult {
+    bool supported = false;
+    bool allowed = false;
+    std::vector<std::string> legalOperations;
+    std::vector<std::string> diagnostics;
+};
+
+class PythonTypeScriptConstructiveEditAdapter {
+public:
+    static PyTsConstructiveEditResult evaluate(const PyTsConstructiveEditRequest& request) {
+        PyTsConstructiveEditResult result;
+        if (request.language != "python" && request.language != "typescript") {
+            result.diagnostics.push_back("unsupported_language");
+            return result;
+        }
+
+        result.supported = true;
+        result.legalOperations = legalOps(request.constructKind);
+        if (result.legalOperations.empty()) {
+            result.supported = false;
+            result.diagnostics.push_back("unsupported_construct");
+            return result;
+        }
+
+        if (!contains(result.legalOperations, request.operation)) {
+            result.diagnostics.push_back("operation_not_legal_for_construct");
+            return result;
+        }
+
+        auto sideEffect = sideEffectGuard(request);
+        if (!sideEffect.empty()) {
+            result.diagnostics.push_back(sideEffect);
+            return result;
+        }
+
+        result.allowed = true;
+        return result;
+    }
+
+private:
+    static std::vector<std::string> legalOps(const std::string& kind) {
+        if (kind == "function") return {"rename", "update", "extract", "inline"};
+        if (kind == "class") return {"rename", "update", "extract"};
+        if (kind == "import") return {"insert", "delete", "reorder"};
+        if (kind == "signature") return {"update", "extract"};
+        if (kind == "module_stmt") return {"update", "delete"};
+        return {};
+    }
+
+    static std::string sideEffectGuard(const PyTsConstructiveEditRequest& request) {
+        // Module-level side effects: block destructive/reorder ops when flagged risky.
+        if (!request.moduleSideEffectRisk) return "";
+
+        if (request.constructKind == "import" && request.operation == "reorder") {
+            return "module_side_effect_reorder_blocked";
+        }
+        if (request.constructKind == "module_stmt" && request.operation == "delete") {
+            return "module_side_effect_delete_blocked";
+        }
+        if (request.constructKind == "function" && request.operation == "inline") {
+            return "module_side_effect_inline_blocked";
+        }
+        return "";
+    }
+
+    static bool contains(const std::vector<std::string>& values,
+                         const std::string& value) {
+        return std::set<std::string>(values.begin(), values.end()).count(value) != 0;
+    }
+};