refactor: Standardize error-causes destructuring pattern

Author: claude

lib/agents-md.js

@@ -3,15 +3,13 @@ import fs from "fs-extra";
 import { errorCauses, createError } from "error-causes";
 
 // Error causes for AGENTS.md operations
-const [agentsErrors] = errorCauses({
+const [{ AgentsFileError }] = errorCauses({
   AgentsFileError: {
     code: "AGENTS_FILE_ERROR",
     message: "AGENTS.md file operation failed",
   },
 });
 
-const { AgentsFileError } = agentsErrors;
-
 // The required directives that must be present in AGENTS.md
 // These are keyword patterns that indicate the directive is present
 const REQUIRED_DIRECTIVES = [