Use this skill when the task involves converting or reformatting structured data between file formats such as CSV, JSON, XML, or YAML. Suitable for tasks like "convert this CSV to JSON", "reformat my data file", or "change the file format of this dataset".
SkillScore83Maintained
Automatic
◆Data Engineer pack
Last verified 9/28/2026
What it changes
Passed 17 of 20 test cases with the skill, and 3 of 20 without it.
Without skill13%
With skill83%
Checks it passed that the model alone missed
Specifies --input logs.json
Specifies --output logs.csv
Specifies --input users.json
and 33 more in the full report
17 fixed3 passed either way4 still failing0 broke
Pass-rate lift
+71 pp
Tokens
-68%
Agent turns
0%
Response time
-71%
Model gemini-3.6-flashMeasured 9/28/2026v120 of 24 cases passed with skill · 20 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 17 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 17
Prompt
I have a data batch `sensor_data.csv` that needs to be converted into `sensor_data.json`. Please give me the python3 invocation for this task.
What was checked, without and with the skill
Checked
Without skill
With skill
Invokes scripts/csv_to_json.py
Missed
Passed
Specifies --input sensor_data.csv
Missed
Passed
Specifies --output sensor_data.json
Missed
Passed
case-12 · gemini-3.6-flash · 9/28/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md15 lines3 filesincludes scripts
Data Transform Skill
Converts structured data files between formats (CSV ↔ JSON ↔ XML ↔ YAML).
Available Scripts
scripts/csv_to_json.py — Convert a CSV file to JSON array format
scripts/json_to_csv.py — Flatten a JSON array into a CSV file