Function walk

examples/pdf-server/server.ts:1316–1341

(dir: string, depth: number)

      const WALK_MAX_FILES = 500;
      let truncated = false;
      const walk = async (dir: string, depth: number): Promise<void> => {
        if (depth > WALK_MAX_DEPTH || localFiles.length >= WALK_MAX_FILES) {
          truncated ||= localFiles.length >= WALK_MAX_FILES;
          return;
        }
        let entries;
        try {
          entries = await fs.promises.readdir(dir, { withFileTypes: true });
        } catch {
          return; // unreadable — skip silently
        }
        for (const e of entries) {
          if (localFiles.length >= WALK_MAX_FILES) {
            truncated = true;
            return;
          }
          // Skip dotfiles/dirs and common noise
          if (e.name.startsWith(".") || e.name === "node_modules") continue;
          const full = path.join(dir, e.name);
          if (e.isDirectory()) {
            await walk(full, depth + 1);
          } else if (e.isFile() && /\.pdf$/i.test(e.name)) {
            addLocal(full);
          }
        }
      };
      for (const dir of allowedLocalDirs) await walk(dir, 0);

      // Build text