ragmacs-mcp

Instructions

Implementation Reference

• src/tools.ts:59-64 (handler)

  The actual implementation of checkFeature function that evaluates Elisp to check if a feature is loaded using featurep. Takes a feature name string and returns the feature name if loaded or 'nil' if not.

  export async function checkFeature(feature: string): Promise<string> {
    const result = await emacsEval(
      `(format "%s" (if (featurep (intern-soft ${quoteString(feature)})) ${quoteString(feature)} "nil"))`
    );
    return stripQuotes(result);
  }

• src/index.ts:23-23 (registration)

  Tool registration in the MCP server's ListToolsRequestSchema handler, defining the check_feature tool with its description and input schema.

  { name: "check_feature", description: "Check whether a specific feature is loaded or available.", inputSchema: { type: "object", properties: { feature: { type: "string", description: "Feature name to check." } }, required: ["feature"] } },

• src/index.ts:58-59 (registration)

  The switch case handler that routes check_feature tool calls to the tools.checkFeature function, extracting the feature argument and returning the result as text.

  case "check_feature":
    return text(await tools.checkFeature(args.feature as string));

• dist/tools.d.ts:8-8 (schema)

  TypeScript type declaration for the checkFeature function, specifying it takes a feature string parameter and returns a Promise<string>.

  export declare function checkFeature(feature: string): Promise<string>;

• src/elisp.ts:1-6 (helper)

  The quoteString helper function used by checkFeature to safely escape strings for use in Elisp expressions.

  export function quoteString(s: string): string {
    const escaped = s
      .replace(/\\/g, "\\\\")
      .replace(/"/g, '\\"')
      .replace(/\n/g, "\\n");
    return `"${escaped}"`;