0xdarkmatter/claude-mods/data-processing

Claude Code and agent skill by 0xdarkmatter/claude-mods

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Process JSON with jq and YAML/TOML with yq. Filter, transform, query structured data efficiently. Triggers on: parse JSON, extract from YAML, query config, Docker Compose, K8s manifests, GitHub Actions workflows, package.json, filter data.

Install

npx vskill@latest install 0xdarkmatter/claude-mods/data-processing

SKILL.md

Data Processing

Query, filter, and transform structured data (JSON, YAML, TOML) efficiently from the command line.

Tools

ToolCommandUse For
jqjq '.key' file.jsonJSON processing
yqyq '.key' file.yamlYAML/TOML processing

jq Essentials

bash
# Extract single field
jq '.name' package.json
# Extract nested field
jq '.scripts.build' package.json
# Extract from array
jq '.dependencies[0]' package.json
# Extract multiple fields
jq '{name, version}' package.json
# Navigate deeply nested
jq '.data.users[0].profile.email' response.json
# Filter by condition
jq '.users[] | select(.active == true)' data.json
# Transform each element
jq '.users | map({id, name})' data.json
# Count elements
jq '.users | length' data.json
# Raw string output
jq -r '.name' package.json

yq Essentials

bash
# Extract field
yq '.name' config.yaml
# Extract nested
yq '.services.web.image' docker-compose.yml
# List all keys
yq 'keys' config.yaml
# List all service names (Docker Compose)
yq '.services | keys' docker-compose.yml
# Get container images (K8s)
yq '.spec.template.spec.containers[].image' deployment.yaml
# Update value (in-place)
yq -i '.version = "2.0.0"' config.yaml
# TOML to JSON
yq -p toml -o json '.' config.toml

Quick Reference

Taskjqyq
Get fieldjq '.key'yq '.key'
Array elementjq '.[0]'yq '.[0]'
Filter array`jq '.[] \select(.x)'``yq '.[] \select(.x)'`
Transformjq 'map(.x)'yq 'map(.x)'
Countjq 'length'yq 'length'
Keysjq 'keys'yq 'keys'
Pretty printjq '.'yq '.'
Compactjq -cyq -o json -I0
Raw outputjq -ryq -r
In-place edit-yq -i

When to Use

  • Reading package.json dependencies
  • Parsing Docker Compose configurations
  • Analyzing Kubernetes manifests
  • Processing GitHub Actions workflows
  • Extracting data from API responses
  • Filtering large JSON datasets
  • Config file manipulation
  • Data format conversion

Additional Resources

For complete pattern libraries, load:

  • ./references/jq-patterns.md - Arrays, filtering, transformation, aggregation, output formatting
  • ./references/yq-patterns.md - Docker Compose, K8s, GitHub Actions, TOML, YAML modification
  • ./references/config-files.md - package.json, tsconfig, eslint/prettier patterns

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

Quality evaluation

  • Task evaluationWarning, 88 of 100Marginal. 1 run. Evaluated 7 months ago.

Source

Popularity

Repository stars
51
Repository forks
7
7-day trend score
20

Stars and forks are for the whole GitHub repository, not this skill alone. Refreshed 4 Apr 2026, 6 months ago.

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