Add extracted source directory and README navigation

extracted-source/node_modules/@anthropic-ai/sdk/lib/tools/ToolError.mjs

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+/**
+ * An error that can be thrown from a tool's `run` method to return structured
+ * content blocks as the error result, rather than just a string message.
+ *
+ * When the ToolRunner catches this error, it will use the `content` property
+ * as the tool result with `is_error: true`.
+ *
+ * @example
+ * ```ts
+ * const tool = {
+ *   name: 'my_tool',
+ *   run: async (input) => {
+ *     if (somethingWentWrong) {
+ *       throw new ToolError([
+ *         { type: 'text', text: 'Error details here' },
+ *         { type: 'image', source: { type: 'base64', data: '...', media_type: 'image/png' } },
+ *       ]);
+ *     }
+ *     return 'success';
+ *   },
+ * };
+ * ```
+ */
+export class ToolError extends Error {
+    constructor(content) {
+        const message = typeof content === 'string' ? content : (content
+            .map((block) => {
+            if (block.type === 'text')
+                return block.text;
+            return `[${block.type}]`;
+        })
+            .join(' '));
+        super(message);
+        this.name = 'ToolError';
+        this.content = content;
+    }
+}
+//# sourceMappingURL=ToolError.mjs.map