Convert File

What it does

When your agent uses it

• The user says convert to parquet
• Make this a CSV
• Turn into parquet
• Any variation of format-to-format conversion for data files

Example prompts

• “convert to parquet”
• “save as xlsx”
• “export as JSON”
• “/convert-file”

Requirements

• Pre-approved tools (allowed-tools): Bash

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Resolve input and output
2. 2Convert
3. 3Report

What it can do on your machine

Read from SKILL.md and the folder at commit 7feda8e. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Bash

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • duckdb

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Convert File loads about 720 tokens when it runs. Until then it costs about 101 tokens; SKILL.md has 305 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~101

When it runs · the whole SKILL.md, loaded when a task matches

~720

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from duckdb/duckdb-skills at commit 7feda8e, republished under its MIT licence (© duckdb). 305 words, ~720 tokens.

name

convert-file

description

Convert any data file to another format: CSV, Parquet, JSON, Excel, GeoJSON, and more. Use when the user says "convert to parquet", "save as xlsx", "export as JSON", "make this a CSV", "turn into parquet", or any variation of format-to-format conversion for data files. Also triggers when the user wants to write Parquet, Excel, or other binary formats that Claude cannot produce natively.

allowed-tools

Bash

argument-hint

<input-file> [output-file]

duckdb -c "
<EXTENSION_LOADS>
COPY (FROM '<INPUT_PATH>') TO '<OUTPUT_PATH>' <FORMAT_CLAUSE>;
"

© duckdb, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/convert-file of duckdb/duckdb-skills.

Open the folder on GitHubat commit 7feda8e

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in duckdb/duckdb-skills, which our catalogue first saw on October 7, 2026.

• ipea/geocodebr.claude/skills/convert-file