Data processing

Skill aiskillstore/marketplace/skills/0xdarkmatter/data-processing

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.From its SKILL.md

Install

npx -y skills add aiskillstore/marketplace --skill data-processing

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SKILL.md

2.8 KB, 710 tokens by cl100k_base, as published. Nobody here has run it

Data Processing

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

Tools

Tool	Command	Use For
jq	`jq '.key' file.json`	JSON processing
yq	`yq '.key' file.yaml`	YAML/TOML processing

jq Essentials

# 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

# 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

Task	jq	yq
Get field	`jq '.key'`	`yq '.key'`
Array element	`jq '.[0]'`	`yq '.[0]'`
Filter array	`jq '.[] \| select(.x)'`	`yq '.[] \| select(.x)'`
Transform	`jq 'map(.x)'`	`yq 'map(.x)'`
Count	`jq 'length'`	`yq 'length'`
Keys	`jq 'keys'`	`yq 'keys'`
Pretty print	`jq '.'`	`yq '.'`
Compact	`jq -c`	`yq -o json -I0`
Raw output	`jq -r`	`yq -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

What ships with it: 6 files

33.4 KB alongside SKILL.md

assets/

.gitkeep0 B

references/

scripts/

.gitkeep0 B

skill-report.json27.5 KB

Gives 0 of the 12 instructions most containers cloud skills give in 710 tokens

Counted across 607 of the 705 authors here whose files we hold, read 2026-09-06

Run as non-root userin 34 of 607, across 27 files
Use multi-stage buildsin 29 of 607
Set resource requests and limitsin 24 of 607, across 20 files
Configure liveness and readiness probesin 18 of 607, across 14 files
Use named volumes for persistent datain 14 of 607, across 9 files
Pin base image versionsin 14 of 607
Set up environment variablesin 14 of 607, across 10 files
Pin provider versionsin 14 of 607
Apply least privilege RBAC permissionsin 10 of 607, across 7 files
Create a dockerignore filein 10 of 607
Use remote state with lockingin 9 of 607
Pin base images by digestin 9 of 607, across 8 files

Said here and by no other author read

Query structured data efficiently

Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once. Length counted with cl100k_base; the agent that loads this file may tokenize it differently.