Method diffContent

packages/shell/src/filesystem.ts:1390–1402

(path: string, newContent: string)

  }

  async diffContent(path: string, newContent: string): Promise<string> {
    const existing = await this.readFile(path);
    if (existing === null) throw new Error(`ENOENT: no such file: ${path}`);
    const linesA = existing.split("\n").length;
    const linesB = newContent.split("\n").length;
    if (linesA > MAX_DIFF_LINES || linesB > MAX_DIFF_LINES) {
      throw new Error(
        `EFBIG: content too large for diff (max ${MAX_DIFF_LINES} lines)`
      );
    }
    const normalized = normalizePath(path);
    return unifiedDiff(existing, newContent, normalized, normalized);
  }

  // ── Info ────────────────────────────────────────────────────────