Add additional tools

mcp/files.ts

@@ -0,0 +1,43 @@
+import { execSync } from "node:child_process";
+import { type } from "arktype";
+import { contextualize, tool } from "./shared.ts";
+
+export const ListFiles = type({
+  path: type.string
+    .describe("The path to list files from (defaults to current directory)")
+    .default("."),
+});
+
+export const ListFilesTool = tool({
+  name: "list_files",
+  description:
+    "List files in the repository using git ls-files. Useful for discovering the file structure and locating files.",
+  parameters: ListFiles,
+  execute: contextualize(async ({ path }) => {
+    try {
+      // Use git ls-files to list tracked files
+      // This respects .gitignore and gives a clean list of source files
+      const command = path === "." ? "git ls-files" : `git ls-files ${path}`;
+      const output = execSync(command, { encoding: "utf-8" });
+      const files = output.split("\n").filter((f) => f.trim() !== "");
+
+      if (files.length === 0) {
+        // Fallback for non-git environments or untracked files
+        const findCmd = `find ${path} -maxdepth 3 -not -path '*/.*' -type f`;
+        const findOutput = execSync(findCmd, { encoding: "utf-8" });
+        return {
+          files: findOutput.split("\n").filter((f) => f.trim() !== ""),
+          method: "find",
+        };
+      }
+
+      return { files, method: "git" };
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      return {
+        error: `Failed to list files: ${errorMessage}`,
+        hint: "Try using a specific path if the repository root is not the current directory.",
+      };
+    }
+  }),
+});