Function getChangedFiles

source code/utils/attachments.ts:2065–2163

(
  toolUseContext: ToolUseContext,
)

}

export async function getChangedFiles(
  toolUseContext: ToolUseContext,
): Promise<Attachment[]> {
  const filePaths = cacheKeys(toolUseContext.readFileState)
  if (filePaths.length === 0) return []

  const appState = toolUseContext.getAppState()
  const results = await Promise.all(
    filePaths.map(async filePath => {
      const fileState = toolUseContext.readFileState.get(filePath)
      if (!fileState) return null

      // TODO: Implement offset/limit support for changed files
      if (fileState.offset !== undefined || fileState.limit !== undefined) {
        return null
      }

      const normalizedPath = expandPath(filePath)

      // Check if file has a deny rule configured
      if (isFileReadDenied(normalizedPath, appState.toolPermissionContext)) {
        return null
      }

      try {
        const mtime = await getFileModificationTimeAsync(normalizedPath)
        if (mtime <= fileState.timestamp) {
          return null
        }

        const fileInput = { file_path: normalizedPath }

        // Validate file path is valid
        const isValid = await FileReadTool.validateInput(
          fileInput,
          toolUseContext,
        )
        if (!isValid.result) {
          return null
        }

        const result = await FileReadTool.call(fileInput, toolUseContext)
        // Extract only the changed section
        if (result.data.type === 'text') {
          const snippet = getSnippetForTwoFileDiff(
            fileState.content,
            result.data.file.content,
          )

          // File was touched but not modified
          if (snippet === '') {
            return null
          }

          return {
            type: 'edited_text_file' as const,
            filename: normalizedPath,
            snippet,