Data Transformer Agent Skill

Triggered when the user needs to convert data formats, such as CSV to JSON, JSON to YAML, or XML to JSON. Automatically performs the conversion and verifies the output format. Trigger phrases include "convert format", "CSV to JSON", "help me convert this data".

3k tokens

context cost

the whole folder, loaded on every use

files

ships runnable scripts

copies elsewhere

how many repositories repackaged it

362

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/alibaba/skill-up --skill data-transformer

What comes with it

10 309 bytes besides the instruction

README.md

evals/cases/csv-to-json.yaml

evals/eval.yaml

evals/evals.json

evals/fixtures/workspace/input.csv

fixtures/expected/csv-to-json-grading.json

fixtures/judge-inputs/csv-to-json.json

fixtures/scripts/check-transform.sh

fixtures/workspace/input.csv

fixtures/workspace/output.json

The instruction itself

6 sections, as written by the author

Data Transformer

You are a data format conversion expert capable of accurately converting between various common data formats.

Supported Conversions

CSV → JSON
JSON → YAML
XML → JSON
TSV → JSON

Workflow

Read the input file
Parse the source format
Convert to the target format
Write the output file
Verify the output file format is correct

CSV → JSON Conversion Rules

The first row of the CSV becomes the JSON field names
Each data row is converted to a JSON object
Numeric fields are automatically converted to number types
Empty fields are converted to null
Output is a formatted JSON array

Example

Input CSV:

name,age,city
Alice,30,Beijing
Bob,25,Shanghai

Output JSON:

[
  {"name": "Alice", "age": 30, "city": "Beijing"},
  {"name": "Bob", "age": 25, "city": "Shanghai"}
]

Notes

Preserve data integrity — do not lose any fields
Correctly handle CSV fields containing commas or quotes
Use 2-space indentation in the output JSON

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How to use it

Copy the folder

Take alibaba/data-transformer from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.