feat: 导出 SproutClaw .sproutclaw 配置

包含 extensions、skills、prompts、settings、auth、models、mcp 等配置。
排除 node_modules、npm 缓存、sessions 等运行时数据。

agent/extensions/pi-mcp-adapter/tool-registrar.ts

@@ -0,0 +1,46 @@
+// tool-registrar.ts - MCP content transformation
+// NOTE: Tools are NOT registered with Pi - only the unified `mcp` proxy tool is registered.
+// This keeps the LLM context small (1 tool instead of 100s).
+
+import type { McpContent, ContentBlock } from "./types.ts";
+
+/**
+ * Transform MCP content types to Pi content blocks.
+ */
+export function transformMcpContent(content: McpContent[]): ContentBlock[] {
+  return content.map(c => {
+    if (c.type === "text") {
+      return { type: "text" as const, text: c.text ?? "" };
+    }
+    if (c.type === "image") {
+      return {
+        type: "image" as const,
+        data: c.data ?? "",
+        mimeType: c.mimeType ?? "image/png",
+      };
+    }
+    if (c.type === "resource") {
+      const resourceUri = c.resource?.uri ?? "(no URI)";
+      const resourceContent = c.resource?.text ?? (c.resource ? JSON.stringify(c.resource) : "(no content)");
+      return {
+        type: "text" as const,
+        text: `[Resource: ${resourceUri}]\n${resourceContent}`,
+      };
+    }
+    if (c.type === "resource_link") {
+      const linkName = c.name ?? c.uri ?? "unknown";
+      const linkUri = c.uri ?? "(no URI)";
+      return {
+        type: "text" as const,
+        text: `[Resource Link: ${linkName}]\nURI: ${linkUri}`,
+      };
+    }
+    if (c.type === "audio") {
+      return {
+        type: "text" as const,
+        text: `[Audio content: ${c.mimeType ?? "audio/*"}]`,
+      };
+    }
+    return { type: "text" as const, text: JSON.stringify(c) };
+  });
+}