Function areFileEditsInputsEquivalent

src/tools/FileEditTool/utils.ts:732–775

(
  input1: {
    file_path: string
    edits: FileEdit[]
  },
  input2: {
    file_path: string
    edits: FileEdit[]
  },
)

 * Handles file edits (FileEditTool).
 */
export function areFileEditsInputsEquivalent(
  input1: {
    file_path: string
    edits: FileEdit[]
  },
  input2: {
    file_path: string
    edits: FileEdit[]
  },
): boolean {
  // Fast path: different files
  if (input1.file_path !== input2.file_path) {
    return false
  }

  // Fast path: literal equality
  if (
    input1.edits.length === input2.edits.length &&
    input1.edits.every((edit1, index) => {
      const edit2 = input2.edits[index]
      return (
        edit2 !== undefined &&
        edit1.old_string === edit2.old_string &&
        edit1.new_string === edit2.new_string &&
        edit1.replace_all === edit2.replace_all
      )
    })
  ) {
    return true
  }

  // Semantic comparison (requires file read). If the file doesn't exist,
  // compare against empty content (no TOCTOU pre-check).
  let fileContent = ''
  try {
    fileContent = readFileSyncCached(input1.file_path)
  } catch (error) {
    if (!isENOENT(error)) {
      throw error
    }
  }

  return areFileEditsEquivalent(input1.edits, input2.edits, fileContent)
}