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    "name": "Alicloud Storage Oss Ossutil",
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    "sections": [
      {
        "title": "Validation",
        "body": "python skills/storage/oss/alicloud-storage-oss-ossutil/scripts/check_ossutil.py --output output/alicloud-storage-oss-ossutil/validate.txt\n\nPass criteria: command exits 0 and output/alicloud-storage-oss-ossutil/validate.txt is generated."
      },
      {
        "title": "Output And Evidence",
        "body": "Save command outputs, object listings, and sync logs under output/alicloud-storage-oss-ossutil/.\nKeep at least one upload or listing result as evidence."
      },
      {
        "title": "Goals",
        "body": "Use ossutil 2.0 to manage OSS: upload, download, sync, and resource management.\nProvide a unified CLI flow for install, config, credentials, and region/endpoint handling."
      },
      {
        "title": "Quick Start Flow",
        "body": "Install ossutil 2.0.\nConfigure AK/SK and default region (ossutil config or config file).\nRun ossutil ls to list buckets, then list objects using the bucket region.\nExecute upload/download/sync or API-level commands."
      },
      {
        "title": "Install ossutil 2.0",
        "body": "See references/install.md for platform-specific install steps."
      },
      {
        "title": "Configure ossutil",
        "body": "Interactive configuration:\n\nossutil config\n\nDefault config file paths:\n\nLinux/macOS：~/.ossutilconfig\nWindows：C:\\Users\\issuser\\.ossutilconfig\n\nMain configuration fields include:\n\nAccessKey ID\nAccessKey Secret\nRegion（example default cn-hangzhou; ask the user if the best region is unclear）\nEndpoint（optional; auto-derived from region if omitted）"
      },
      {
        "title": "AccessKey configuration notes",
        "body": "Use RAM users/roles with least privilege and avoid passing AK in plain text on command line.\n\nRecommended method (environment variables):\n\nexport ALICLOUD_ACCESS_KEY_ID=\"<your-ak>\"\nexport ALICLOUD_ACCESS_KEY_SECRET=\"<your-sk>\"\nexport ALICLOUD_REGION_ID=\"cn-beijing\"\n\nALICLOUD_REGION_ID can be used as default region; if unset choose the most reasonable region, ask user if unclear.\n\nOr use the standard shared credentials file:\n\n~/.alibabacloud/credentials\n\n[default]\ntype = access_key\naccess_key_id = <your-ak>\naccess_key_secret = <your-sk>"
      },
      {
        "title": "Command structure (2.0)",
        "body": "High-level command example:ossutil config\nAPI-level command example:ossutil api put-bucket-acl"
      },
      {
        "title": "Common command examples",
        "body": "ossutil ls\nossutil ls oss://your-bucket -r --short-format --region cn-shanghai -e https://oss-cn-shanghai.aliyuncs.com\nossutil cp ./local.txt oss://your-bucket/path/local.txt\nossutil cp oss://your-bucket/path/remote.txt ./remote.txt\nossutil sync ./local-dir oss://your-bucket/path/ --delete"
      },
      {
        "title": "Recommended execution flow (list buckets first, then objects)",
        "body": "List all buckets\n\nossutil ls\n\nGet target bucket region from output (e.g. oss-cn-shanghai) and convert it to --region format (cn-shanghai).\n\n\nWhen listing objects, explicitly set --region and -e to avoid cross-region signature/endpoint errors.\n\nossutil ls oss://your-bucket \\\n  -r --short-format \\\n  --region cn-shanghai \\\n  -e https://oss-cn-shanghai.aliyuncs.com\n\nFor very large buckets, limit output size first.\n\nossutil ls oss://your-bucket --limited-num 100\nossutil ls oss://your-bucket/some-prefix/ -r --short-format --region cn-shanghai -e https://oss-cn-shanghai.aliyuncs.com"
      },
      {
        "title": "Common errors and handling",
        "body": "Error: region must be set in sign version 4.\n\nCause: missing region configuration.\nFix: add region in config file, or pass --region cn-xxx.\n\n\n\nThe bucket you are attempting to access must be addressed using the specified endpoint\n\nCause: request endpoint does not match bucket region.\nFix: use endpoint of the bucket region, e.g. -e https://oss-cn-hongkong.aliyuncs.com.\n\n\n\nInvalid signing region in Authorization header\n\nCause: signature region does not match bucket region.\nFix: correct both --region and -e; both must match bucket region."
      },
      {
        "title": "Credential and security guidance",
        "body": "Prefer RAM user AK for access control.\nCLI options can override config file, but passing secrets on command line has leakage risk.\nIn production, manage secrets via config files or environment variables."
      },
      {
        "title": "Clarifying questions (ask when uncertain)",
        "body": "Is your target a Bucket or an Object?\nDo you need upload/download/sync, or management actions like ACL/lifecycle/CORS?\nWhat are the target region and endpoint?\nAre you accessing OSS from ECS in the same region (intranet endpoint may be preferred)?"
      },
      {
        "title": "References",
        "body": "OSSUTIL 2.0 overview and install/config:\n\nhttps://help.aliyun.com/zh/oss/developer-reference/ossutil-overview\n\n\n\nOfficial source list:references/sources.md"
      },
      {
        "title": "Prerequisites",
        "body": "Configure least-privilege Alibaba Cloud credentials before execution.\nPrefer environment variables: ALICLOUD_ACCESS_KEY_ID, ALICLOUD_ACCESS_KEY_SECRET, optional ALICLOUD_REGION_ID.\nIf region is unclear, ask the user before running mutating operations."
      },
      {
        "title": "Workflow",
        "body": "Confirm user intent, region, identifiers, and whether the operation is read-only or mutating.\nRun one minimal read-only query first to verify connectivity and permissions.\nExecute the target operation with explicit parameters and bounded scope.\nVerify results and save output/evidence files."
      }
    ],
    "body": "Category: tool\n\nOSS (ossutil 2.0) CLI Skill\nValidation\npython skills/storage/oss/alicloud-storage-oss-ossutil/scripts/check_ossutil.py --output output/alicloud-storage-oss-ossutil/validate.txt\n\n\nPass criteria: command exits 0 and output/alicloud-storage-oss-ossutil/validate.txt is generated.\n\nOutput And Evidence\nSave command outputs, object listings, and sync logs under output/alicloud-storage-oss-ossutil/.\nKeep at least one upload or listing result as evidence.\nGoals\nUse ossutil 2.0 to manage OSS: upload, download, sync, and resource management.\nProvide a unified CLI flow for install, config, credentials, and region/endpoint handling.\nQuick Start Flow\nInstall ossutil 2.0.\nConfigure AK/SK and default region (ossutil config or config file).\nRun ossutil ls to list buckets, then list objects using the bucket region.\nExecute upload/download/sync or API-level commands.\nInstall ossutil 2.0\nSee references/install.md for platform-specific install steps.\nConfigure ossutil\nInteractive configuration:\nossutil config\n\nDefault config file paths:\nLinux/macOS：~/.ossutilconfig\nWindows：C:\\Users\\issuser\\.ossutilconfig\n\nMain configuration fields include:\n\nAccessKey ID\nAccessKey Secret\nRegion（example default cn-hangzhou; ask the user if the best region is unclear）\nEndpoint（optional; auto-derived from region if omitted）\nAccessKey configuration notes\n\nUse RAM users/roles with least privilege and avoid passing AK in plain text on command line.\n\nRecommended method (environment variables):\n\nexport ALICLOUD_ACCESS_KEY_ID=\"<your-ak>\"\nexport ALICLOUD_ACCESS_KEY_SECRET=\"<your-sk>\"\nexport ALICLOUD_REGION_ID=\"cn-beijing\"\n\n\nALICLOUD_REGION_ID can be used as default region; if unset choose the most reasonable region, ask user if unclear.\n\nOr use the standard shared credentials file:\n\n~/.alibabacloud/credentials\n\n[default]\ntype = access_key\naccess_key_id = <your-ak>\naccess_key_secret = <your-sk>\n\nCommand structure (2.0)\nHigh-level command example:ossutil config\nAPI-level command example:ossutil api put-bucket-acl\nCommon command examples\nossutil ls\nossutil ls oss://your-bucket -r --short-format --region cn-shanghai -e https://oss-cn-shanghai.aliyuncs.com\nossutil cp ./local.txt oss://your-bucket/path/local.txt\nossutil cp oss://your-bucket/path/remote.txt ./remote.txt\nossutil sync ./local-dir oss://your-bucket/path/ --delete\n\nRecommended execution flow (list buckets first, then objects)\nList all buckets\nossutil ls\n\n\nGet target bucket region from output (e.g. oss-cn-shanghai) and convert it to --region format (cn-shanghai).\n\nWhen listing objects, explicitly set --region and -e to avoid cross-region signature/endpoint errors.\n\nossutil ls oss://your-bucket \\\n  -r --short-format \\\n  --region cn-shanghai \\\n  -e https://oss-cn-shanghai.aliyuncs.com\n\nFor very large buckets, limit output size first.\nossutil ls oss://your-bucket --limited-num 100\nossutil ls oss://your-bucket/some-prefix/ -r --short-format --region cn-shanghai -e https://oss-cn-shanghai.aliyuncs.com\n\nCommon errors and handling\n\nError: region must be set in sign version 4.\n\nCause: missing region configuration.\nFix: add region in config file, or pass --region cn-xxx.\n\nThe bucket you are attempting to access must be addressed using the specified endpoint\n\nCause: request endpoint does not match bucket region.\nFix: use endpoint of the bucket region, e.g. -e https://oss-cn-hongkong.aliyuncs.com.\n\nInvalid signing region in Authorization header\n\nCause: signature region does not match bucket region.\nFix: correct both --region and -e; both must match bucket region.\nCredential and security guidance\nPrefer RAM user AK for access control.\nCLI options can override config file, but passing secrets on command line has leakage risk.\nIn production, manage secrets via config files or environment variables.\nClarifying questions (ask when uncertain)\nIs your target a Bucket or an Object?\nDo you need upload/download/sync, or management actions like ACL/lifecycle/CORS?\nWhat are the target region and endpoint?\nAre you accessing OSS from ECS in the same region (intranet endpoint may be preferred)?\nReferences\n\nOSSUTIL 2.0 overview and install/config:\n\nhttps://help.aliyun.com/zh/oss/developer-reference/ossutil-overview\n\nOfficial source list:references/sources.md\n\nPrerequisites\nConfigure least-privilege Alibaba Cloud credentials before execution.\nPrefer environment variables: ALICLOUD_ACCESS_KEY_ID, ALICLOUD_ACCESS_KEY_SECRET, optional ALICLOUD_REGION_ID.\nIf region is unclear, ask the user before running mutating operations.\nWorkflow\nConfirm user intent, region, identifiers, and whether the operation is read-only or mutating.\nRun one minimal read-only query first to verify connectivity and permissions.\nExecute the target operation with explicit parameters and bounded scope.\nVerify results and save output/evidence files."
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