feat(cursor): Add cursor Provider

open-sse/translator/request/openai-to-cursor.js

@@ -0,0 +1,96 @@
+/**
+ * OpenAI to Cursor Request Translator
+ * Converts OpenAI messages to Cursor simple format
+ */
+import { register } from "../index.js";
+import { FORMATS } from "../formats.js";
+
+/**
+ * Convert OpenAI messages to Cursor simple format
+ * - system → user with [System Instructions] prefix
+ * - tool → user with [Tool Result: name] prefix
+ * - assistant with tool_calls → append [Calling tool: name with args: {...}] to content
+ */
+function convertMessages(messages) {
+  const result = [];
+
+  for (const msg of messages) {
+    if (msg.role === "system") {
+      result.push({
+        role: "user",
+        content: `[System Instructions]\n${msg.content}`
+      });
+      continue;
+    }
+
+    if (msg.role === "tool") {
+      let toolContent = "";
+      if (typeof msg.content === "string") {
+        toolContent = msg.content;
+      } else if (Array.isArray(msg.content)) {
+        for (const part of msg.content) {
+          if (part.type === "text") {
+            toolContent += part.text;
+          }
+        }
+      }
+      
+      const toolName = msg.name || "tool";
+      result.push({
+        role: "user",
+        content: `[Tool Result: ${toolName}]\n${toolContent}`
+      });
+      continue;
+    }
+
+    if (msg.role === "user" || msg.role === "assistant") {
+      let content = "";
+
+      if (typeof msg.content === "string") {
+        content = msg.content;
+      } else if (Array.isArray(msg.content)) {
+        for (const part of msg.content) {
+          if (part.type === "text") {
+            content += part.text;
+          }
+        }
+      }
+
+      if (msg.role === "assistant" && msg.tool_calls && msg.tool_calls.length > 0) {
+        if (content) {
+          result.push({ role: "assistant", content });
+        }
+        
+        const toolCallsText = msg.tool_calls.map(tc => {
+          const funcName = tc.function?.name || "unknown";
+          const funcArgs = tc.function?.arguments || "{}";
+          return `[Calling tool: ${funcName} with args: ${funcArgs}]`;
+        }).join("\n");
+        
+        result.push({
+          role: "assistant",
+          content: toolCallsText
+        });
+      } else if (content) {
+        result.push({ role: msg.role, content });
+      }
+    }
+  }
+
+  return result;
+}
+
+/**
+ * Transform OpenAI request to Cursor format
+ * Returns modified body with converted messages
+ */
+export function buildCursorRequest(model, body, stream, credentials) {
+  const messages = convertMessages(body.messages || []);
+  
+  return {
+    ...body,
+    messages
+  };
+}
+
+register(FORMATS.OPENAI, FORMATS.CURSOR, buildCursorRequest, null);