Klaviyo Contact List CSV Preflight

    1

    **LOCAL PYTHON DOWNLOAD:** A downloadable local Python tool with Agent Skill instructions, not a standalone desktop app or hosted service.

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    Klaviyo Contact List CSV Preflight

    Example session with this skill installed

    Synthetic seller example: the supplied finding is "The CSV is missing its required Email header.". Explain the next step using this Skill. Do not claim you ran a check, change files, connect to accounts or publish anything.

    • Read your context and instructions
    • Compiled the klaviyo contact list
    • Generated the data export

    Synthetic seller example

    This illustrates a complete explanation of a supplied finding. It is not a claimed CLI run or target-platform test.

    Review decision

    Review the supplied finding before the manual platform workflow. No import, upload, remote action or correction has been performed.

    Supplied findingNext action
    The CSV is missing its required Email header.Correct the header in a working copy and rerun; confirm consent separately before any manual import.

    Deliverable

    Preserve the original input and its version. Keep the local issue receipt with the reviewed working copy. After correcting the finding in a separate working copy, rerun the exact documented command; an agent must not claim execution merely from this example.

    Scope

    Check a local Klaviyo list CSV for identifier-first header, missing or repeated email/phone identifiers, malformed rows and size/encoding problems before a manual import. Offline, read-only and no contact values in the report.

    Buyer responsibility

    Use the shipped README for installation, supported operating systems, dependencies, input limits and commands. The output covers the documented subset only. Complete the target platform's own review afterwards; a local receipt is not a guarantee of acceptance.

    klaviyo-contact-list-csv-preflight.csv

    CSV · data export

    Generated

    Example file from a real run - the skill writes it into your workspace.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    LOCAL PYTHON DOWNLOAD: A downloadable local Python tool with Agent Skill instructions, not a standalone desktop app or hosted service. Python3.11+ is required. Follow the included README for exact supported operating systems, installation dependencies and limits. Optional local MCP needs a compatible host and SDK; the CLI works independently.

    Short description: Check a local Klaviyo list CSV for identifier-first header, missing or repeated email/phone identifiers, malformed rows and size/encoding problems before a manual import. Offline, read-only and no contact values in the report.

    Buyer receives: Python 3.11+ CLI, optional local MCP adapter, Agent Skill instructions, sample CSV and guide. JSON receipt has codes/row numbers and SHA-256.

    Limits: 50 MB/200,000 rows; at most 256 columns per record, 65,536 header characters and 1,000,000 characters per data record. Does not verify inboxes, actual marketing consent, account flows, deliverability or Klaviyo acceptance. The built-in Klaviyo import is free; integration tools are alternatives.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

      Free skills download straight away. Paid skills unlock right after purchase.

    2. 2

      Unzip into your skills folder

      Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.

    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

    Skills folder by agent

    Click the path to copy it. Create the folder if it does not exist yet.

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    Trust & safety

    Security scanned

    Verified clean 2 days ago

    • Passed all security checks, Safe to install

    Needs access to

    Klaviyo

    Listed2 days ago

    What's inside

    Frequently Asked Questions