devutils-mcp-server

Instructions

Implementation Reference

• src/tools/text.ts:116-183 (handler)

  Registration and implementation of the 'case_convert' MCP tool.

  server.tool(
    "case_convert",
    "Convert a string between different casing styles: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and more.",
    {
      input: z.string().describe("The string to convert"),
      to: z
        .enum([
          "camelCase",
          "PascalCase",
          "snake_case",
          "kebab-case",
          "CONSTANT_CASE",
          "Title Case",
          "lowercase",
          "UPPERCASE",
        ])
        .describe("Target case style"),
    },
    async ({ input, to }) => {
      // Tokenize: split on spaces, hyphens, underscores, and camelCase boundaries
      const words = input
        .replace(/([a-z])([A-Z])/g, "$1 $2")
        .replace(/[_\-]+/g, " ")
        .split(/\s+/)
        .filter((w) => w.length > 0)
        .map((w) => w.toLowerCase());
  
      let result: string;
      switch (to) {
        case "camelCase":
          result = words
            .map((w, i) =>
              i === 0 ? w : w.charAt(0).toUpperCase() + w.slice(1)
            )
            .join("");
          break;
        case "PascalCase":
          result = words
            .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
            .join("");
          break;
        case "snake_case":
          result = words.join("_");
          break;
        case "kebab-case":
          result = words.join("-");
          break;
        case "CONSTANT_CASE":
          result = words.join("_").toUpperCase();
          break;
        case "Title Case":
          result = words
            .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
            .join(" ");
          break;
        case "lowercase":
          result = words.join(" ");
          break;
        case "UPPERCASE":
          result = words.join(" ").toUpperCase();
          break;
        default:
          result = input;
      }
  
      return { content: [{ type: "text" as const, text: result }] };
    }
  );