parquet-cli skill for coding agents

SKILL.md

name	description	license	compatibility	metadata
parquet-cli	Work with Parquet files - view schema, metadata, contents, and convert between formats	MIT	opencode	audience use-case developers data-files

What I do

This skill enables you to inspect, convert, and manipulate Parquet files using the parquet CLI tool.

Available commands

Command	Description
meta	Print Parquet file metadata (row groups, columns, compression)
schema	Print the Avro schema for a file
cat	Print the first N records from a file
head	Print the first N records from a file
scan	Scan all records from a file
pages	Print page summaries for a Parquet file
dictionary	Print dictionaries for a Parquet column
footer	Print Parquet file footer in JSON format
column-index	Print column and offset indexes
column-size	Print column sizes
bloom-filter	Check bloom filters for a Parquet column
check-stats	Check for corrupt page and column stats
convert	Create a Parquet file from a data file (CSV, JSON, etc.)
to-avro	Create an Avro file from a Parquet file
convert-csv	Create a Parquet file from CSV data
csv-schema	Build a schema from a CSV data sample
rewrite	Rewrite one or more Parquet files with new settings

Common examples

# View file metadata
parquet meta data.parquet

# View schema
parquet schema data.parquet

# View first 10 records
parquet head -n 10 data.parquet

# View all records (as JSON)
parquet cat data.parquet

# View footer in JSON format
parquet footer data.parquet

# Check column statistics
parquet check-stats data.parquet

# Convert CSV to Parquet
parquet convert-csv -s schema.avsc data.csv data.parquet

# Convert Parquet to Avro
parquet to-avro data.parquet output.avro

# Rewrite with different compression
parquet rewrite -c SNAPPY data.parquet output.parquet

# Print column dictionary values
parquet dictionary data.parquet column_name

When to use me

• Inspect Parquet file structure and schemas
• Debug Parquet file issues
• Convert between Parquet, CSV, Avro formats
• Extract sample data from large Parquet files
• Analyze column statistics and bloom filters