data-transformer

A tool for converting data between common formats such as CSV, JSON, YAML, XML, and TSV. CSV and TSV are table-like text files, while JSON and YAML store structured data.

In plain words
What is it for?
Use it to convert CSV or TSV tables to JSON, JSON to YAML, or XML to JSON. It can handle quoted fields, numeric values, and empty fields according to its conversion rules.
Why use it?
It removes the need to write one-off conversion scripts and helps preserve fields and data types during the conversion. It also verifies that the resulting format is valid.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/alibaba/skill-up/script-judge-eval
Any agent
npx skills add alibaba/skill-up --skill script-judge-eval
Clone the repo
git clone --depth 1 https://github.com/alibaba/skill-up

Made for: Claude Code, Codex.

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 325 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00058 $0.00325
Opus 5 $0.00029 $0.00162
Sonnet 5 $0.00012 $0.00065
Haiku 4.5 $0.00006 $0.00032

Measured 3d ago against content hash 388a0957e789, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

data-transformer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (fixtures/scripts/check-transform.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

e2e/testdata/script-judge-eval/SKILL.md · 55 lines

What it actually says

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

  1. Read the input file
  2. Parse the source format
  3. Convert to the target format
  4. Write the output file
  5. 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
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 55 lines · 58 tokens per session scan A 388a0957e789

Subscribe to this mod's changes

data-transformer is a skill published in the GitHub repository alibaba/skill-up (757 stars, last pushed 7d ago), licensed Apache-2.0. It adds 58 tokens to every session and 325 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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