yq - YAML, JSON & XML Processor

The yq module is a versatile tool for handling structured data formats, primarily YAML. The x-cmd version adds an interactive REPL powered by FZF to make browsing complex configuration files intuitive.

When to Activate

• When the user needs to query or modify YAML configuration files.
• When converting between YAML, JSON, and other formats.
• When interactively exploring nested YAML structures with live feedback.
• When extracting specific values from deeply nested keys.

Core Principles & Rules

• Interactive Exploration: Use the repl (or r) subcommand for a searchable TUI to browse YAML data.
• Multiformat: Supports YAML, JSON, XML, and properties files as output or input formats.
• In-place Edits: Support for modifying files directly via the -i flag.

Patterns & Examples

Interactively Explore Config

# Browse a complex configuration file with FZF
x yq r config.yml

Extract Value

# Get a specific nested value from a YAML file
x yq '.database.host' config.yml

Convert Formats

# Output a YAML file as JSON
x yq -o json config.yml

Checklist

• Confirm if the target file is YAML, JSON, or XML.
• Verify if an interactive view or a specific extraction is needed.
• Check if the file should be modified in-place (-i).